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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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100
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300
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600
Mea
n n
um
ber
of.
hri
ps
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600
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600
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600
2008
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2002 2004 2006
2010
1998 1996 1994
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2012
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600
2014
Months
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
0
1
2
3
4
5
6
7
8
Mea
n n
o. m
elo
n t
hri
ps
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
0
2
4
6
8
10
12
14
Me
an n
o. m
elo
n t
hri
ps
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
0
20
40
60
80
100
120
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
0
10
20
30
40
50
60
70
80
90
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
0
100
200
300
Radiant Lan-
Guth
Agrimek Control
Mea
n n
um
ber o
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
0
10
20
30
40
Mea
n n
o. la
rva
e
a
b
c c c
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
0
10
20
30
40
50
60
70
80
Sivanto Belay Torac Control
% la
rval
mo
rtal
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
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
Mea
n n
o. a
du
lts
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
0
0.05
0.1
0.15
0.2
0.25
0.3
Mea
n n
o. a
du
lts
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
0
0.2
0.4
0.6
0.8
1
1.2
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
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
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)
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
5 10 15 20 25 30 35 40
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
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
5 10 15 20 25 30 35 40
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
0
5
10
15
20
25
30
5 10 15 20 25 30 35 40
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
0
2
4
6
8
10
12
14
16
18
5 10 15 20 25 30 35
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
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