MANAGING THRIPS ON VEGETABLE CROPS

Dakshina R. Seal (DAK)

University of Florida-IFAS, Tropical Research and

Education Center, Homestead, FL

Melon thrips and its hosts

Solanaceae: Eggplants, pepper, potato, tobacco, ground cherry.

Cucurbitaceae: Cucumber, watermelon, muskmelon, cantaloupe, pumpkin, bitter melon, squash, hairy gourd. Leguminoceae: Kidney bean, broad bean, cowpea, soybean, etc.

Melon thrips damage

Melon thrips adults Melon thrips larvae Eggplant

Cucumber Squash Bean

Seasonal abundance of T. palmi in ‘Pod Squad’ beans during 1994 – 2014

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2012

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Melon thrips control

Various studies were conducted at TREC research plots using: Bean Squash Cucumber Tomato

Melon thrips control on tomato using various insecticide treatments at TREC, UF-IFAS, 2014

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Prespray

Post spray

Applied two times on the foliage at 7 d intervals. Samples were collected 48h after each application. Evaluation was made by counting larvae on randomly selected 10 flowers/plot. Durivo: Thiamethoxam+Chlorantraniliprole; A21390: Abamectin+Cyantraniliprole

Treatments Rate [oz.]/acre

Control

A21390a 8

A21390b 8

A21390c 8

Radiant 8

Durivo 13

Exirel 13.5

Melon thrips control using various insecticide treatments in a commercial tomato field, 2014

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14

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Prespray

Postspray

Applied four times on the foliage at 7 d intervals. Samples were collected 48h after each application. Evaluation was made by counting larvae on randomly selected 10 flowers/plot (Brigadier: Befenthrin + imidacloprid; Beleaf: Flonicamid; Belay: Clothianidin)

Treatments Rate [oz]/acre

Exirel 21.4

Radiant 8

Brigadier 5

Venom + Radiant 5.0 + 8.0

Assail + Lorsban 6.0 + 16.0

Beleaf 4

Movento + Radiant 5.0 + 8.0 Belay + Malathion 6.0 + 32.0

Lorsban 16

Agrimek 16

Brigade 2.5

Control

Melon thrips control using various insecticide treatments at a commercial tomato field, 2014

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Percent reduction

Treatments Rate [oz]/acre

Exirel 21.4

Radiant 8

Brigadier 5

Venom + Radiant 5.0 + 8.0

Assail + Lorsban 6.0 + 16.0

Beleaf 4

Movento + Radiant 5.0 + 8.0

Belay + Malathion 6.0 + 32.0

Lorsban 16

Agrimek 16

Brigade 2.5

Control

Melon thrips control on squash using various insecticide treatments at TREC field, 2014

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Applied four times on the foliage at 7 d intervals. Samples were collected 48 h after each application. Evaluation was made by counting larvae on randomly selected 10 leaves/plot. (Sulfoxaflor: Trade name Closure; IRAC: 4C)

Treatments Rate[oz]/a

Sulfoxaflor 4.50

Sulfoxaflor

Movento

3.50

5.00

Sulfoxaflor

Radiant

3.50

8.00

Sulfoxaflor

Radiant

Belay

3.50

8.00

6.00

Sulfoxaflor

Tolfenpyrad

3.50

21.00

Sulfoxaflor

Lannate

Cyazypyr

3.50

24.00

20.50

Control

Mean no. of larvae

1995

2008

2012

2014

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Radiant Lan-

Guth

Agrimek Control

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f thrip

s

F=25.4; df=3,15; P > 0.05

Effectiveness of various insecticides in controlling melon thrips on squash, 1995 to 2014.

45.25

25.5

2.40

0.92

Applied four times on the foliage at 7 d intervals. Samples were collected 48h after each application. Evaluation was made by counting larvae on randomly selected 10 leaves/plot.

Treatments Rate [oz]/acre

Radiant 6.0 - 8.0 Lannate 16

Guthion 16 Agrimek 16

Control

Effectiveness of Torac and Belay in

controlling T. palmi in cucumber, 2013

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Applied four times on the foliage at 7 d intervals Samples were collected 48h after each application Evaluation was made by counting larvae on randomly selected 10 leaves/plot. (Torac: Tolfenpyrad; IRAC: 21A)

Treatments Rate [oz]/acre

Control

Belay 6

Belay 8

Torac 21

Radiant 8

Percent mortality of melon thrips in a leaf disc bioassay in a laboratory condition

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Sivanto Belay Torac Control

% la

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ity

10 mature melon thrips larvae were used in each replication. Each treatment was replicated four times. (Sivanto: Flupyradifurone; Butenolide group; IRAC 4D)

Treatments Rate [oz]/acre

Sivanto 21

Belay 8

Torac 21

Control

Management of Frankliniella thrips, vectors of tospoviruses, GRSV and TCSV, in tomatoes

using various insecticides

COMMON BLOSSOM THRIPS

F. schultzei F. fusca

F. occidentalis T. palmi

WESTERN FLOWER THRIPS

About 2.0 mm in length 150-300 eggs Egg – adult: 13 days Female longevity: 45 days

http://www.sardi.sa.gov.au TSWV

Common blossom thrips control using various insecticide treatments at TREC tomato field,

2014

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Prespray

Post spray

Applied two times on the foliage at 7 d intervals Samples were collected 48h after each application Evaluation was made by counting larvae on randomly selected 10 flowers/plot.

Treatments Rate [oz.]/acre Control

A21390a 8 A21390b 8 A21390c 8

Radiant 8 Durivo 13

Exirel 13.5

Western flower thrips control using various insecticide treatments at TREC tomato field,

2014

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0.05

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0.15

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0.25

0.3

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Prespray

Post spray

Applied two times on the foliage at 7 d intervals Samples were collected 48h after each application Evaluation was made by counting larvae on randomly selected 10 flowers/plot. (A21390: abamectin + cyantraniliprole)

Treatments Rate [oz.]/acre Control

A21390a 8 A21390b 8 A21390c 8

Radiant 8 Durivo 13

Exirel 13.5

Common blossom thrips control using various insecticide treatments at a commercial tomato field, 2014

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1

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1.4 Prespray Postspray

Applied two times on the foliage at 7 d intervals Samples were collected 48h after each application Evaluation was made by counting larvae on randomly selected 10 flowers/plot.

Treatments Rate [oz]/acre

Exirel 21.4

Radiant 8

Brigadier 5

Venom + Radiant 5.0 + 8.0 Assail + Lorsban 6.0 + 16.0

Beleaf 4

Movento + Radiant 5.0 + 8.0 Belay + Malathion 6.0 + 32.0

Lorsban 16

Agrimek 16

Brigade 2.5

Control

Mean no. of CBT adults

Western flower thrips control using various insecticide treatments in a commercial tomato field, 2014

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0.8 Prespray Postspray

Applied two times on the foliage at 7 d intervals. Samples were collected 48h after each application. Evaluation was made by counting larvae on randomly selected 10 flowers/plot.

Treatments Rate [oz]/acre

Exirel 21.4

Radiant 8

Brigadier 5

Venom + Radiant 5.0 + 8.0

Assail + Lorsban 6.0 + 16.0

Beleaf 4

Movento + Radiant 5.0 + 8.0 Belay + Malathion 6.0 + 32.0

Lorsban 16

Agrimek 16

Brigade 2.5

Control

Mean no. of WFT adults

Control of Common blossom thrips (Frankliniella shultzei) and Flower thrips (F. occidentalis) in tomato by applying DPX-HGW86 20SC as a soil drench

Treatments Rate [oz]/A Method of application

1. DPX-HGW86 20SC 13.5 At plant

2. Admire Pro DPX-HGW86 20SC 3. Admire Pro

10.5 10.3 10.5

At plant Drip at 14 & 28 DAP At plant

4. DPX-HGW86 20SC 10.3 On foliage

5. Untreated check

DPX-HGW86 20SC = Cyazypyr (Verimark and Exirel)

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DPX soil

Admire soil

Combine

DPX foliar

Control

Control of F. schultzei in tomatoes using DPX and Admire Pro as a soil drench

DPX applied on foliage provided better reduction of F. schultzei than other treatments

F. Schultzei was not recorded on the combination treatment for the first 20 d

Foliage

soil

combination

Mean no. of common blossom thrips adults

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DPX soil

Admire soil

Combine

DPx foliar

Control

Control of F. occidentalis in tomatoes using DPX and Admire Pro as a soil drench

soil

Foliage combination

DPX applied on foliage provided better reduction of F. occidentalis than other

treatments, but did not differ from the combination treatment.

F. occidentalis was not recorded on the DPX treatments for the first 10 d

Mean no. of western flower thrips adults

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DPX soil

Admire soil

combine

Dpx foliar

Control

Control of GSRV in tomatoes using DPX and Admire Pro as a soil drench

DPX applied on foliage did not differ from DPX applied in soil in reducing GRSV.

Admire in soil followed by DPX on foliage was significantly better than all other treatments in

reducing GRSV incidence.

combination

Foliage soil

Mean no. of plants with GRSV incidence

Evaluation of premixed products in controlling pests of tomato: all treatments were applied once at plant as a soil drench

Treatments Rate/acre Active ingredients

A16901 WG 131.0 oz wt Thiamethoxam + an experimental product

A16971 WG 65.4 oz wt An experimenal product

Durivo SC 123.0 fl oz Thiamethoxam + chlorantraniliprole

Platinum SG 34.2 oz wt Thiamethoxam

Venom SG 6.0 oz wt Dinotefuran

Check

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A16901B

A16971B

Durivo

Platinum

Venom

Control

Management of GRSV applying premixed insecticides, TREC, 2012

Durivo, Venom, and Platinum did not significantly reduce GRSV affected plants

when compared with the nontreated control

Mean no. of plants with GRSV incidence

Disclaimer

• The above information on the efficacy of insecticides in controlling thrips were generated based on our various research studies. This information should not be used as a recommendation by the University of Florida for controlling any specific pest. Use of an insecticide must be based on the label of that insecticide.

• .

Mohammed Razzak Ph. D. Student