DEAS  753: 2021  
ICS 65.020.20  
 
© EAC 2022                                                                                                                              First Edition 2022  
 EAST AFRICAN STANDARD  
Seed p otato— Requirements for certification   
 
 
 
 
 
 
 
 DEAS 753 : 2022 
ii © EAC 2022 – All rights re served  
 Copyright notice  
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Reproduction for sales purposes may be subject to royalty payments or a licensing agreement.  
Violators may be prosecuted . DEAS 753 : 2022 
© EAC 2022 – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  1 
4 Requirements  ................................ ................................ ............................. Error! Bookmark not defined.  
4.1 Eligible varieties  ................................ ................................ ........................ Error! Bookmark not defined.  
4.2 Application for certification  ................................ ................................ ......Error! Bookmark not defined.  
4.3 Field inspection  ................................ ................................ ......................... Error! Bookmark not defined.  
4.4 Specific field requirements  ................................ ................................ ......Error! Bookmark not defined.  
4.4.1  Clones  ................................ ................................ ................................ ......... Error! Bookmark not defined.  
5 Clone specifications  ................................ ................................ .................. Error! Bo okmark not defined.  
4.3 Land requirements  ................................ ................................ .................... Error! Bookmark not defined.  
4.4 Rotation  ................................ ................................ ................................ ......Error! Bookmark not defined.  
4.5 Spacing  ................................ ................................ ................................ .......Error! Bookmark not defined.  
5 Certificates  ................................ ................................ ................................ .Error! Bookmark not defined.  
6 Packaging  ................................ ................................ ................................ ...Error! Bookmark not defined.  
7 Labelling  ................................ ................................ ................................ .....Error! Bookmark not defined.  
10 Methods of sampling and testing  ................................ ............................ Error! Bookmark not defined.  
Annex  A (normative)  Scope of application of standard  ................................ ....Error! Bookmark not defined.  
Annex  B (informative)  Seed crop declaration form  ................................ ........... Error! Bookma rk not defined.  
Annex C  (Normative)  Seed test certificate  ................................ ......................... Error! Bookmark not defined.  
Bibliography  ................................ ................................ ................................ ................................ ......................  17 
 DEAS 753 : 2022 
iv © EAC 2022 – All rights re served  
 Foreword  
Development of the East African Standards has been necessitated by the need for harmonizing requirements 
governing quality of products and services in the East African Community. It is envisaged that through 
harmonized standardization, trade barriers that are encountered when goods and s ervices are exchanged 
within the Community will be removed.  
The Community has established an East African Standards Committee  (EASC)  mandated to develop and 
issue East African Standards  (EAS) . The Committee is composed of representatives of the National 
Standards Bodies in Partner States, together with the representatives from the public and private sector 
organizations  in the community .  
East African Standards are developed through  Technical Committees that are representative of key 
stakeholders including  government, academia, consumer groups, private sector and other interested parties. 
Draft East African Standards are circulated to stakeholders through the National Standards Bodies in the 
Partner States. The comments received are discussed and incorporat ed before finalization of standards, in 
accordance with the Principles and procedures for development of East African Standards. XXXXXX.  
East African Standards are subject to review, to keep pace with technological advances. Users of the East 
African Stand ards are therefore expected to ensure that they always have the latest versions of the standards 
they are implementing .  
The committee responsible  for this document is Technical Committee EASC /TC 012, Seed and propagation 
materials . 
Attention is drawn to t he possibility that some of the elements of this document may be subject of patent 
rights. EAC shall not be held responsible for identifying any or all such patent rights.  
 DRAFT EAST AFRICAN STANDARD  DEAS 756 : 2022 
 
© EAC 2022 – All rights reserved  1 
 Seed p otato — Requirements for certification  
1 Scope   
This Draft East African Stan dard specifies the certification requirements for pre -basic, basic and certified seed 
potato (Solanum tuberosum ). It includes requirements for eligible varieties, application for certification, field 
requirements, field inspection, storage inspection, sizi ng and grading, packaging and labelling.  
2 Normative references   
The following documents are referred to in the text in such a way that some or all of their content constitutes 
requirements of this document.  For dated references, only the edition cited a pplies. For undated references, 
the latest edition of the referenced document (including any amendments) applies.  
3 Terms and definitions   
For the purposes of this standard, the terms and definitions given in UPOV  apply.  
ISO and IEC maintain terminologica l databases for use in standardization at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp  
3.1 
seed test certificate  
legal document issued by the national seed certificatio n authority, which states that a seed lot has met the 
requirements set in this standard  
3.2 
distinctness  
variety is deemed to be distinct if it is clearly distinguishable in at least one character from any other variety 
whose existence is a matter of commo n knowledge at the time of filing the application for registration  
3.3 
field 
defined and identifiable area of land or facility that is used to produce a seed crop under the Seed Certification 
Scheme  
3.4 
field inspection  
inspection of a field and or seed cr op, by an inspector to check if the minimum requirements for seed 
certification have been satisfied  
3.5 
field number  
number assigned to the field by the national seed certification authority, when the application form for 
certification is submitted   
2 © EAC 2022 – All rights re served  
 3.6 
germination  
emergence and development of a seedling to a stage where the aspect of its essential structures indicates 
whether or not it is able to develop further into a satisfactory plant under favourable conditions in the field  
3.7 
seed producer  
person or e ntity registered to produce seed  
3.8 
inert matter  
seed units and all other matter and structures not defined as pure seed or other seeds  
3.9 
isolation  
minimum distance or time between two crops of peas that is required to prevent contamination either 
mecha nically or by cross pollination  
3.10 
inspector  
authorized official or accredited entity responsible for carrying out seed certification activities  
3.11 
International Seed Testing Association (ISTA) rules  
rules for seed testing published by the Internationa l Seed Testing Association  
3.12 
label  
tag or other device that is attached to or written, stamped, or printed on any container of seed or that 
accompanies any lot of bulk seed and which describes the kind of seed and any other information required by 
relev ant regulation  
3.13 
previous cropping  
minimum period (seasons or years) that elapse between the production of a crop of the same species in the 
same  field as the one entered in the certification scheme  
3.14 
maintainer  
person or organisation responsible for  the production or maintenance of a bred variety included in a national 
list of varieties/variety catalogue eligible for certification, and ensure that the variety remains true to type 
throughout its full life -span and in the case of hybrid varieties, that  the formula for hybridisation is followed  
3.15 
national designated seed certification authority  
organization, or agency empowered by national legislation to administer the certification of seed potato under 
this Standard  
3.16 
noxious weed  
weed species, th e seed of which is difficult to separate during processing or has undesirable effects on the 
crop produced, for example by possible genetic contamination  
3.17 
off-type 
plant of the same species which does not exhibit the recognised and accepted habit and c haracteristics of the 
variety being grown   
© EAC 2022 – All rights reserved  3 
 3.18 
other seeds  
seeds of any plant species other than that of the crop sample that is being tested. They consist of weed seeds 
and other crop seeds  
3.19 
parental material  
population or lines used by a breeder to m aintain a variety  
3.20 
person  
natural person or legal entity  
3.21 
post -control plot  
small plot where a representative sample of a seed lot is grown to determine the identity and purity of the 
variety and to check if the seed certification system is operati ng satisfactorily  
3.22 
pure seed  
species stated by an applicant, or found to predominate in a test, and includes all botanical varieties and 
cultivars of that species, including intact seeds and pieces of seed units larger than one -half their original size  
3.23 
variety registration  
recording of a new variety in a national variety list/catalogue when it has been tested and satisfied the 
requirements for distinctness, uniformity, stability, and has value for cultivation and use  
3.24 
rogueing  
removal of off -types and diseased plants or any other unwanted plant from a seed crop if they may reduce the 
quality of the harvested crop  
3.25 
seed certification  
process by which the quality and identity of a seed lot is assured  
3.26 
seed lot  
defined quantity of seed bear ing the same reference number and for which the origin, production history and 
identity is known  
3.27 
stability  
condition of a variety distinguishing characteristics to remain unchanged after repeated growing cycles  
3.28 
uniformity  
variety is deemed to be uniform if, subject to the variation that may be expected from the particular features of 
its propagation, it is sufficiently uniform in its relevant characteristics  
3.29 
variety  
assemblage of cultivated plants which is clearly distinguished by any charact ers (morphological, physiological, 
cytological, chemical or others) and which, when reproduced, (sexually or asexually) retains its distinguishing  
characters   
4 © EAC 2022 – All rights re served  
 3.30 
variety catalogue/national list varieties  
list of varieties that have been registered by a na tional authority and can be produced and marketed as 
certified seed  
3.32 
pre-basic seed  
seed that is derived from breeder seed and is used to produce basic seed through one cycle of multiplication  
3.34 
seed  
planting materials used for generative propagatio n of plants  
3.35 
basic seed  
seed that has been produced from breeder or pre -basic seed and is used for the production of certified seed  
3.36 
certified seed  
seed that is produced from basic seed through one or two generations of multiplication  
3.36.1  
certif ied seed 1st generation  
first generation of seed derived from basic seed  
3.36.2  
certified seed 2nd generation  
certified seed 2nd generation which is multiplied once and from certified seed 1st generation  
3.36.3  
breeder  
person who breeds or discovers and de velops a seed variety  
4 Seed classes  
For the purpose of this standard, the following classes of seed shall apply:  
a) Pre-basic seed;  
b) Basic seed; and  
c) Certified seed:  
1) 1st generation (C1); and  
2) 2nd generation (C2).  
 
5. General requirements  
5.1 Seed potato shall b e free from pests of quarantine importance and regulated non quarantine pests with 
zero tolerance and meet the thresholds stated in this standard in regard to the regulated non -quarantine 
pests, injurious diseases and pests and from any defects likely to i mpair their quality as seed.  
5.2 Seed potato shall be substantially dry outside and, in general, of normal shape for the variety.   
© EAC 2022 – All rights reserved  5 
 5.3 Seed potato or growing crops of potato shall not be treated with sprout inhibitors without permission from 
the national d esignated seed certification authority.   
6 Eligible varieties  
6.1 Varieties eligible for seed certification shall be those registered in the national list of varieties/variety 
catalogue.  
6.2 The national designated seed certification authority shall keep the official descriptor of the varieties in 
hard and electronic copies.  
7 Application requirements for certification  
7.1 The minimum application of certification of a seed crop shall include the following:  
a) name, address and contact details of the seed grow er; 
b) crop and variety to be sawn;  
c) physical location;  
d) area and reference number of the field and  cropping history for the past two cropping seasons ; 
e) class of seed to be produced; and  
f) registration number of the seed grower.  
7.2 Information and crops related t o the previous cropping history, origin of seed planted and field 
inspection shall be kept and used for certification to ensure full traceability of quality genetic identity and purity 
of the seed harvested.  
7.3 Seed producer of pre -basic, basic and certif ied seeds shall apply for certification of a seed crop not 
later than thirty (30) days after plantin g by filling the form in Annex A.  
8 Field inspection  
8.1 The national seed certification authority shall prepare the inspections’ schedule for the inspector s, 
based on all necessary information on the application form, to ensure that the timing of inspections allows the 
standards in Table 1 to be properly assessed.  
8.2 A minimum of two field inspections shall be made during the growing season, the first inspe ction at 
flowering/canopy cover for non -flowering varieties / tuber initiation stage and the second inspection at tuber 
development stage.  
8.3 Seed potato shall be free from pests of quarantine importance and regulated non quarantine pests with 
zero tolera nce and meet the thresholds stated in this standard in regard to the regulated non -quarantine 
pests, injurious diseases and pests and from any defects likely to impair their quality as seed.  
 
8.4 At the time of the first inspection, the inspector shall con firm with the grower the previous cropping of 
the field, checking on isolation, and the proof of origin/authentication of the variety planted by using the labels.    
6 © EAC 2022 – All rights re served  
 8.5 The inspector shall inspect the field in accordance with the procedure provided in Annex  C to check  the 
requirements in Table 1.  
8.6 The field inspection report shall indicate the field status and comments for any corrective actions 
required such as re -inspection to confirm the field standards.  All field inspection reports shall be provided to 
the grower and applicant  after each inspection in a timely manner. The fi eld inspection report in Annex D  shall 
be signed by both the inspector and the grower or the grower’s representative.  
9 Field requirements  
9.1 Pre basic seed shall be produced unde r the responsibility of the breeder/maintainer.  
9.2 Basic seed shall be produced under responsibility of licensed seed producer(s).  
9.3 Certified seed shall be produced in t wo generations.  
9.4 A field producing a seed crop of irish potato shall be approved  for certification if it complies with the 
requirements in Table 1  
Table 1 — Field and storage requirements for seed crops  
S/N  Variable  Pre basic seed  Basic seed  Certified seeds 
(C1, C2)  
Field  
i.  Previous cropping 
requirements , seasons, min.  5 4 3 
ii.  Isolation, m, min .  10 10 5 
iii.  Maximum Off -types %, max .  1 2 3 
Diseases and Pests  
iv.  Mycoplasma , %, max . 0 0.1 0.1 
v.  PVY, PVX, PVM, PLRV, PVS, 
PVA, %, max . 0 0 0.1 
vi.  SMV, %, max . 0 0 1 
vii.  Fusarium wilt, %, max . 0 0 0.2 
viii.  Verticilium wilt, %, max .  0 0.2 
ix.  Ralstonia solanacearum, 
%, max.  0 0 0.1 
x.  Nematode, number o 
infected plants %, max.  0 0 0.2 
 
 
10 Storage inspection  
10.1 The harvested tubers  from the field approved for certification shall be kept as an identified seed lot . The 
seed lot shall be sampled and  inspected to check if the seed tubers conform to the requirements specified in 
table 3.   
© EAC 2022 – All rights reserved  7 
 10.2 The maximum size of a seed lot for certification purposes is 30 000 kg; lots larger than this shall be 
divided and given separate lot numbers.  
10.3 Seed potato s hall be substantially dry outside and, in general, of normal shape for the variety.  
Table 3 — Seed lot inspection  requirements  
S/N  Variable  
tubers per 50 kg bag  Pre basic seed  Basic seed  Certified seeds 
(C1, C2)  
Pests and diseases  
i.  Scab (Common, Powd ery) 
max   
Common potato scab  
(Streptomyces scabiei )   
Powdery scab  (Spongospora 
subterranea ) 25 25 50 
ii.  Black curl ( Rhizoctonia 
solani )¸max  10 10 30 
iii.  Pink rot ( Phytophthora 
erythroseptica ), max   0 0 1 
iv.  Soft rot ( Erwinia carotovora ), 
max    0 0 1 
v.  Severe tuber moth, max.  2 2 5 
Defects  
vi.  Presence of earth and 
extraneous matter (%by 
weight)   1 2 3 
vii.  Dry and wet rot  0 1 2 
viii.  External defects (e.g. 
malformed  or damaged 
tubers)  0 0 5 
ix.  Shrivelled tubers which have 
become excessively 
dehydrated and wrin kled, % 
by weight  0 1 2 
 
11 Size grading requirements  
11.1 Pre-basic seeds are exempted from size requirements  
11.2 The size of the tuber for basic, and certified shall be between 2 5 mm  and 55mm . 
The following size range shall apply  
a) Small 25 -35 mm  
b) Medium 36 -45 mm  
c) Big 46 -55  
8 © EAC 2022 – All rights re served  
 11.3 Basic, and certified seeds shall not contain more than 5 tubers per 25kg not falling within the declared 
size range   
12 Labelling  
12.1 All categories of seed that have been certified shall be packaged to safeguard the quality of the seed 
and shall have the official label of the national designated seed certification authority.  
12.2 The labels for each category shall be identified by the following colours:  
a) Pre-basic seed: Violet band on white;  
b) Basic seed: White;  
c) Certified seed 1: Blue;  
d) Certified seed 2: Red;  
 
12.3 The labels shall be prominent, indelible and legible, and issued by a national designated seed 
certification authority. The following information shall be included on the official labels:  
a) name of the crop , “cassava stem cutting”;  
b) species (Latin name);  
c) variety denomination;  
d) seed lot number;  
e) number of cuttings per package;  
f)  harvest date.  
g) logo of the national designated seed certification authority ;  
h) name and address of national designated seed certifica tion authority ;  
i) seed c lass; and  
j) season and country of production.  
It is recommended that the harvesting of the cutting be done in the presence of inspector and the seed dealer. 
In this case, the package should be legibly and indelibly labelled with the following information:  
h) inspector name/code;  
i) harvest  date; and  
j) certificate number.   
© EAC 2022 – All rights reserved  9 
 12.4 Chemical treatment  
The nature of the active substance of any chemical treatment of the seed potato shall be indicated either on 
the outside of the unit of p resentation, on the official label or a label provided by the supplier, or printed on the 
unit of presentation. This information may also appear inside the unit of presentation.  
12.5 Re -inspection and re -labelling  
If re-inspection is conducted, the authori ty which carried out the re -inspection shall be stated on the new label, 
as well as the date of the re -sealing.  Re -labelling shall be done under the supervision of 12.4 Chemical 
treatment . 
The nature of the active substance of any chemical treatment of  the seed potato shall be indicated either on 
the outside of the unit of presentation, on the official label or a label provided by the supplier, or printed on the 
unit of presentation. This information may also appear inside the unit of presentation.  
12.5  Re-inspection and re -labelling  
If re-inspection is conducted, the authority which carried out the re -inspection shall be stated on the new label, 
as well as the date of the re -sealing.  Re -labelling shall be done under the supervision of the NDA. The new  
label shall show the particulars which appeared on the old label. If a new label is necessary, this shall show 
the particulars, which appeared on the old label, the date of the re -closing and the authority concerned. NDA/ 
certification authority. The new label shall show the particulars which appeared on the old label. If a new label 
is necessary, this shall show the particulars, which appeared on the old label, the date of the re -closing and 
the authority concerned.  
13 Post control test  
The Post control t ests shall be carried out in accordance with OECD Schemes for Varietal Certification or the 
Control of Seed Moving in the International Trade .  
10 © EAC 2022 – All rights re served  
 Annex A  
(Informative ) 
FORM ................  
 
Grower No…………………….  
  
 
 
APPLICATION FOR FIELD INSPECTION OF A SEED CROP  
 
1. Full name of grower ________________________ Physical location/GPS coordinates__________ Postal 
Address ___________ Tel. No. ________________________  
2. Farm on which the seed crop is being grown _______________________ L/R. No. ______________ ___  
3. Details of crop (Every crop regardless of size must be mentioned separately. a crop is field planted 
within 5 days).  
 
    Crop         
 
Field 
crop 
No. Species  Variety
  Lot No. of 
seeds used  
 Class of seed 
used  Ha Date 
planted  Approx’ 
date of 
harvest Previous 
cropping history  
         
         
         
         
         
         
         
 
 
 
4. Seed rate per hectare ______________________________________ kg  
 
 
 
5. I have enclosed _______________________ as proof of origin.  
 
6. The person w ho will daily be in charge of this seed crop is  (name/telephone number)  
______________________________  
   
© EAC 2022 – All rights reserved  11 
  
 
9. Declaration:  
I hereby declare that all information provided here is true to the best of my knowledge and belief and I shall 
always observe all conditions governing Seeds production as provided in the Seeds Act and Regulations.  
 
 
Date ……………………….. Signature of applicant………………………………………………………..  
 
Stamp of seed dealer ……………………………………………………………..  
 
  
12 © EAC 2022 – All rights re served  
 Annex B  
 
FORM ………             
Date………  
G/No…… … 
FIELD  INSPECTION REPORT  
 
Growers Name ___________________________________Species ________________________  
Variety ______________________Field No. (s) Name___________________________________  
Crop No.(s) _____________________________Hectares_______________ ___ Class  ____________  
         1st                                        2nd                              3rd………………………………………….. Inspection 
(tick)  
ITEMS:  
1. is the crop true to type?              Yes                       No                           Doubtful  
Remarks……………………………………………………………………………………………..  
2. Isolation in distance/time           satisfactory                             Not Satisfactory  
Remarks……………………………………………………………………………………………..  
3. Off -type(s) (describe)………………………………………………………………………… ……….  
Remarks……………………………………………………………………………………………..  
4. Noxious Weeds (Specify) …………………………………………………………………………….  
Total found………………………………………………………………………………………….  
5. Other Crop Species (specify)………………………………………………………………………….  
6. Health (Diseases)…………………………………………………… …………………………………  
7. Crop Stand               Good           Satisfactory                 Not satisfactory  
Remarks……………………………………………………………………………………………..  
8. Estimated yield at final inspection…………………………………………………………………….  
No of counts made……………………………… Average c ount………………………………………  
No of plants counted………………………………………tassels/selfing plant found……………..%  
CROP RESULT                     Pending                Approved               rejected because of …………………  
If to be re -inspected within ……………………………………………………………………… .. days  
Further remarks …………………………………………………………………………………………  
………………………………………………………………………………………………………Bags/ha  
Copy to: _________________________________________________  
 
Seed Inspector(s) Name……………………………………Signature……………….  
     
© EAC 2022 – All rights reserved  13 
   
14 © EAC 2022 – All rights re served  
 Annex C 
Inspection procedure  
C.1 Purpose  
This procedure is intended to provide guidelines for the  Seed Inspector. They are intended to  address the  methods 
used to determine seed potato as provided in the relevant standards.  
C.2 Scope  
This procedure covers inspection of the general status  of the seed crop, identification of the source of the  seed, 
isolation, previous cropping, genetic purity and health status of the seed crop.  
C.3 Definition of terms  
For the purpose of this procedure the terms a nd definitions provided in seed potato standa rd shall apply.  
C.4 Equipment and tools  
Inspector shall be equipped with the following:  
a) current seed law, regulations and relevant standards,  
b) seed crop declaration form,  
c) variety descriptors,  
d) seed inspector service card or letter of introduction , 
e) tally counter,  
f) support literature,  
g) measuring wheel/GPS,  
h) protective clothing,  
i) report book, and  
j) calculator.   
© EAC 2022 – All rights reserved  15 
 C.5 Procedure details  
C.5.1  Stage 1: Source of seeds  
C.5.1.1 In order to authenticate the identity of the seed planted, seed produ cer retains at least one 
label  from each seed lot used to plant the crop . 
C.5.1.2 The inspector checks the details provided on the label against those on the seed crop declaration  form 
and confirms the identity of the variety.  
C.5.1.3 The inspector proceed s to next stage if the declared information correspond to those on the label  
otherwise the field is automatically rejected.  
C.5.2 Stage 2: C onfirmation of field size and previous cropping  
C.5.2.1 The seed inspector interviews the seed producer on details o f previous cropping seasons of  the field.  
C.5.2.2 In case the previous cropping requirements are met, inspector proceeds to the next stage.  
C.5.2.3 The seed inspector, by using GPS or measuring wheel, calculates the area of the field to confirm  to 
the decl ared area.  
C.5.3 Stage 3: Checking isolation distance  
The inspector checks isolation of the seed crop whilst walking around its perimeter. If the required  distance is not 
met, the inspector evaluates any risk of physical mixture and seed born disease conta mination  and makes relevant 
decision/recommendation.  
C.5.4 Stage 4: Checking the general status of the field  
C.5.4.1 The inspector assesses the general status of the field and determines whether it is in satisfactory  
conditions to permit the detailed exami nation of plants for varietal purity.  
C.5.4.2 Seed crop which is highly infested with weeds, stunted or poorly grown because of disease, pests  or 
other causes and which cannot be assessed for other parameters is rejected.  
C.5.5 Stage 5: Detailed examinatio n of off -types and diseases  
The final stage in inspection is the assessment of varietal purity and health status of the seed crop. This is  done 
when the crop location, source of seeds, varietal identity, isolation and crop condition are all satisfactory.  To do this, 
it is necessary to follow a sampling procedure which focuses attention on small areas of the seed  crop for detailed 
examination.   
16 © EAC 2022 – All rights re served  
 C.6 Sampling  
C.6.1 General  
C.6.1.1 The inspector does the counts following a walking pattern that enables him/her to  extrapolate the  
whole field while sampling  
C.6.1.2 The number of counts (samples) depends on the size of the field, 5 counts for a field up to 2 ha  and 
an increase of 1 count for each increase of 2 ha.  
C.6.1.3 The sample corresponds to a count of 100 plan ts 
NOTE one plant corresponds to all progenies deriving from one seed (cutting).  
C.6.2 Examination of off -types  
By using the descriptor of the variety, the inspector evaluates the key characteristics of the variety, including  but not 
limited to leaf shape,  leaf and stem colour; in each count and the number of offtypes is recorded and  the percentage 
is calculated after examining all counts.  
C.6.3 Examination of diseases  
C.6.3.1 The inspector uses clear symptom description and chart (photo) to recognise a dis eased plant.  
C.6.3.2 In each count, the inspector checks infected plant with the disease s mentioned in Table 1 and  takes 
record for each of them.  
C.6.3.3 The inspector calculates the percentage of infected plant after examining all samples.  
C.6.3.4 In case  there is confusion in symptoms, the inspector may recommend laboratory testing.  
C.6.4 Examination of pests  
The inspector examines for the presence of pests , determines their  percentage and provides appropriate 
recommendation.  
C.6.5 Decision taking  
C.6.5.1  The inspector compares the calculated percentage for each parameter with acceptable limits  provided 
in the standard . 
C.6.5.2 Based on the results of the comparison, the inspector may accept, downgrade to lower category  or 
reject the seed crop (part or who le) 
C.6.5.2.1 The seed crop is accepted when it complies with the requirements specified in the standard.  
C.6.5.2.2  The seed crop is downgraded to lower category when it does not meet the requirements of the  
declared category but meeting those of any lower  category , otherwise the crop is rejected.  
C.6.6 Reporting  
The report is done as by filling in the form provided in Annex A.  
© EAC 2022 – All rights reserved  17 
 Bibliography  
 WD/TC/018/006 : 2020    
 
© EAC 2020 – All rights reserved