Q&A「Insect-resistant orange sheet 」
High-speed Roll-up Door

Manufacturers improve the performance of insectresistant sheets for High-speed Roll-up Doors. The mostpopular type is “Insect-resistant orange sheet”. Do you
know the familiar orange sheet is having highperformance and reliability in comparison to another?
We collaborate with Dainihon Jochugiku Co., Ltd who isthe major company of insecticide manufacturer and wellknown for familiar KINCHO brand to summarize theinformation in common question-and-answer format.

Cooperative company︓Dainihon Jochugiku Co., Ltd.

UNIFLOW INTERNATIONAL PTE. LTD.

Is it true that insects are drawn to yellow and orange?
Q1 オレンジとグリーンの防虫シートがありますが、どちQ3らの効果が高いのですか︖
is a common theory, however the examination results showed noA1 Thissignificant difference between orange and green even though green isA3 well known for having higher insect-proof performance. Regarding theattractant effects on insects, it differs depending on the kind of insects
and environmental condition. Therefore, there are some points which
are not clearly known.

Comparison results of flying insects attracted by reflected light（When light shines on a sheet in a day time）*To which color of sheet more insects are attracted? → No. of individuals attracted is less＝Higher insect-proof performance.

Flies
Family chiroromidae
Family psychodidae
Fruit flyHemiptera
Lepidoptera
Hymenoptera
Total :

1st time
OrangeGreen
91253
95627310103825

2nd time
Orange
Green
20
10
551
3
2025
00
6035
33

The state of practical examination (outside)

Results︓No significant difference was seen.

（Examination method）Hanged a lantern at the center part, lined up 2 sheets each at the same height. Set up these at 3locations where were at 1.7m(high)、1.0m(medium) and 0.3m(low). Checked the kinds and the numbers of insects
trapped after an entire day and night.

Cooperative company︓Dainihon Jochugiku Co., Ltd.

There is no significant difference compared with green and orange doesn’t
easily draw insects!!

Q2 In the first place, how the insect-resistant sheet prevents from insects?
A2

It prevents insects from coming flying by intercepting a wavelength that
only insects can see with utilizing the habit of insects swarming around alight (UV light).

Flying insects doesn’t have high visual acuity, however they recognize UV light that people cannot
see and act relying on it. The reason why insects swarming around a lamp at night is that they
react to the UV light of lamp. An insect-resistant sheet prevents insects from intercepting awavelength of light which is close to UV light and insects like and makes the light invisible forinsects. There is no significant difference of functions compared with orange and green.
Transmittance of insect-resistant sheet at respective wavelength―Visual acuity of insects

Transmittance (%)―Transparent―Insect-resistant orange―Insect-resistant dark green―Insect-resistant green（Examined by JAPAN UNIFLOW）

Wavelength (nm)

*It provides more effective insect-resistant performance where the area overlapping with the visual-acuity
line of insects is smaller.

It prevents insects from coming flying by making the light invisible for insects
through a sheet.
Wavelength (mm)

There are 2 colors of insect-resistant sheets which are orange and green.

Q3 Which color of sheet provide more effective insect-proofing effect?

A3 As a result of examination, we confirmed that the orange sheet can provide

more insect-proofing effect compared with green. It is especially effective inthe night and characteristic that it is hard to bring flies close.

The result of comparative study assuming attractant situation
on insects performed by KINCHO showed that orange sheet
was harder to bring flies close than green sheet which meansorange sheet can provide more insect-proofing effect.
Especially in the transmitted light (especially the light leaking
from buildings in the night), the result turned out to be*The situation that insects are attracted by a sheet shutter

something to support that orange is harder than green to bring (Left : Reflected light, Right : Transmitted light)

Reflected light : Light reflecting in a sheet in a day timeflies close. Significant difference was seen against flies at food Transmitted light : Light leaking from buildings in the nightand pharmaceutical factories.

The number of flying insects attracted to light were compared. (To which sheet more
insects drawn and trapped)
Comparison of the numbers of individuals of flying insects attracted to transmitted light

Common house mosquito
Asian tiger mosquito
House flyVinegar fly
Drosophila hydei
Phorid fly
Family psychodidae

Average
Judgment result
Average of Day 1 Entrainment ratio Average of Day 2 Entrainment ratio
G/Oof entrainment ratio
Number captured
Number captured
Orange(O) Green(G)(G/O)
Orange(O) Green(G)(G/O)(Entrainment ratio) (Insect-proofing effect)
2153
2.5
1335
2.7
2.6
Orange is higher
20
191
1118
1.6
1.3
Draw2372
3.1
1395
7.3
5.2
Orange is much higher
3051
1.74225.5
3.6
Orange is higher
11121.1
3103.3
2.2
Orange is higher
10131.3
24
1.3
Draw1000-Comparison of the numbers of individuals of flying insects attracted to reflected light

Average of Day 1 Entrainment ratio Average of Day 2 Entrainment ratio
Judgment result
Average
Number captured
Number capturedof entrainment ratio
G/O
Orange(O) Green(G)(G/O)
Orange(O) Green(G)(G/O)(Entrainment ratio) (Insect-proofing effect)
Green is higher
Common house mosquito
4326
0.6
32
230.7
0.7
Green is higher
Asian tiger mosquito
63
13100.80.7
Orange is higher
House fly
3362
1.92137
1.81.8Draw
Vinegar fly
21100.5
16231.4
1
Orange is higher
Drosophila hydei
356101.7
1.7
Draw
Phorid fly
1260.5917
1.9
1.2
Family psychodidae
1232-

Result︓
Large number of insect was trapped in transmitted light.
There was no clear difference in reflected light.
Entrainment ratio(Comparison between green and orange)＝The number of insects trappedby Green sheet ÷The number of insects trapped by orange sheet.
※Entrainment ratio…Less than 1:Attracted to orange, Less than 1〜1.5:No clear difference,Less than 1.5〜5:Attracted to green, More than 5:Strongly attracted to green
The data was excluded when both of the number of insects trapped was less than 10.

Collected trial sheets（Transmitted light）
Left : Green Right : Orange（Cooperative company︓Dainihon Jochugiku Co., Ltd.）The orange sheet is harder to bring insects close than green and canprovide more insect-proofing effect compared with green!!!

I saw a product that is capable of drawing back the insects intruded
Q4 indoors
using yellow sheet which insects like. Is it possible?
According to the test result、the attracting effect of fluorescent lamp is

A4 superior to yellow color in a factory（More insects swarm）. This method ishardly realized because the difference of light source or surrounding
environment has a significant influence to the attracting effect.

Comparison between ordinary fluorescent lamp
and various colors of sheets

Comparison between UV ray cut fluorescentlamp and various colors of sheets

Phorid fly

Phorid fly

DrosophilaHydeiDrosophila
Hydei

Vinegar fly

Vinegar fly

WhiteYellow

House fly
Asian tiger
mosquito
CommonhousemosquitHouse fly

BlackBlack

Asian tiger
mosquito

UV ray cut
fluorescentlamp

UV ray cut
fluorescentlamp

Commonhouse

WhiteYellow

mosquitoMore insects swarmed around a fluorescent lamp than yellow

After all, insects swarmed around a fluorescent lamp andsheet, and more insects were drawn to black than yellow.

more insects were drawn to black than yellow.

The test was performed in conditions that is assumed to be in a factory tocompare the insect attractiveness between the fluorescent lamps (ordinarytype and UV ray cut-type) and the 3 colors of sheets (white・yellow・black).
As a result, insects swarmed around both types of fluorescent lamps morethan any color of sheet. And, more insects were drawn to white and black
compared with yellow.
Therefore, (large number of insects can be recognized) drawing back insects
intruded indoors with yellow sheet may not be true. There is a high possibility
that they are strongly attracted to the colors in the surroundings if there wassomething white or black around yellow object.

Fluorescent lamp

①Ordinary-type②UV ray cut-type【Evaluation method】

Adhesive spray coated wrap is attached to the light source and the sheet were set up in the laboratory as
shown in Fig 1. Further, all the windows inside were covered with aluminum foil which hardly receives

Fig 1.Locations where the test samples
were set in the laboratory.

（Cooperative company︓Dainihon Jochugiku Co., Ltd.）effect of sunlight or fluorescent lamp outside. The number of insects attracted and trapped were counted
after turned on the light in the room after test insects were released and left there for one night.

Is it difficult to attract insects with yellow sheet because insects swarm around afluorescent lamp or other colors?
【Summary】
Insect-resistant orange sheet does not draw insects, it is harder than green sheet to bring flies
close, especially effective in the night and against flies!
It can provide more insect-proofing effect than green.
You can be assured that this product is reliable to adopt.

UNIFLOW INTERNATIONAL PTE. LTD.
81, Ubi Avenue 4, #07-07 UB. One, Singapore 408830
TEL: (65) 6536 3239
(Japanese) https://www.uniflow.co.jp/(English) https://www.uniflow.co.jp/en/

Issued in October, 2016