United States Department of Agriculture

Animal and Plant Health Inspection Service

Plant Protection and Quarantine



## Amend PPQ Treatment Manual to Add a Methyl

Bromide Treatment for Cotton s eed (Gossypium spp.)

Treatment Evaluation Document (TED )

Date : April 12

, 2012

Treatments, Pests, Commodities and Countries

New Treatment/

Revision/Deletion Treatment Type Target Pests Commodity

Applicable Country(ies) of

origin

New Treatment MB Treatment Fusarium

oxysporum f. sp.

vasinfectum Cotton s eed All

Objective: To provide supporting information and justification for changes being

proposed to phytosanitary treatments in the PPQ Treatment Manual. The change, which

will facilitate trade of cottonseed for food or feed from countries/areas infested with

Fusarium oxy sporum f. sp. vasinfectum (FOV) , is being made because new data

demonstrate the efficacy of the treatment against Fusarium oxysporum f. sp. vasinfectum

(FOV) strains VCG 01111 and VCG 01112 on cottonseed

.

Overview: Currently APHIS uses methyl bromide ( MB ) fumigation as a phy to sanitary

treatment for pink bollworm ( Pectinophora spp. ) in cottonseed (bulk, sacked, or

packaged ) as well as other cotton commodities

. Australia is seeking market access for

their cottonseed and has submitted research information in support of methyl bromide

treatment for this commodity ( Horitos, 2001 and 2002 ).

Evaluation: APHIS evaluated these data and has recommended regulatory approval of a

new treatment based on the data. The evaluation and recommendation for a pproval is as

follows.

Addition of a methyl bromide treatment for cottonseed for Fusarium oxysporum f. sp.

vasinfectum (FOV) strains VCG 01111 and 01112.2 Based on the data submitted by Haritos ( 200 1, 2002 ) on cottonseed , we accept and

propose the following treatment schedule to treat cotton seed for FOV ( Fusarium

oxysporum f. sp. vasinfectum ) strains 01111 and 01112 when imported to the U.S. from

Australia :

• 7 lbs. per 1000 cubic feet at 40 degrees Fahrenheit or above fo r 24 hours , or

• 5 lbs. per 1000 cubic feet at 40 degrees Fahrenheit or above for 48 hours.

Temperature Dosage Rate

(lb s. /1,000

ft 3 ) Minimum Concentration Readings

(ounces) at :

2 hr s 4 hrs 6 hrs 12 hrs 24 hrs 36

hrs 48

hrs

40 o F or above 7 lbs 60 50 50 35 20

5 lbs 20 20 20 15 15 15

The proposed treatment s listed above are similar to those of T301

- a

- 2 , which is an

APHIS approved treatment against Pink Bollworm ( Pectinophora spp. ) for cottonseed

and other cotton commodities . The proposed treatment will employ a longer duration

than T301

- a

- 2 in order to control FOV strains 01111 and 01112

.

Other conditions as described in 7CFR305. 5 also apply.

Decision: Amend PPQ Treatment Manual to add the above proposed treatment for

c otton seed for FOV ( Fusarium oxysporum f. sp. vasinfectum ) strains 01111 and 01112

.

Author:

Marc Phillips

Import Specialist

USDA APHIS PPQ PHP

References:

Haritos, V. 2001. Assessment of methyl bromide efficacy towards Fusarium oxysporum

in fuzzy cottonseed. Globex International/Grainco Australia Ltd. Queensland, Australia.

34 pp

.

Haritos, V., Bentley, S., Dojchinov, G., Gulino, L., O’Neill, W., Pattermore, J., and

Summerell, B. 2002. Laboratory Investigation of the Efficacy of Methyl Br omide against

Fusarium spp. Infecting Cottonseed. CSIRO Entomology, Canberra, Australia. 34 pp.