Thrips, spider mite and seed bug control with insecticides Justin - - PowerPoint PPT Presentation

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Feb 16, 2024 35 likes •230 views

Thrips, spider mite and seed bug control with insecticides Justin Renkema Small Fruit Entomology Gulf Coast Research and Education Center Presentation available at: https://jmrlab.wordpress.com Recent Presentations Flower thrips (

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Thrips, spider mite and seed bug control with insecticides

Justin Renkema Small Fruit Entomology

Gulf Coast Research and Education Center

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Presentation available at:

https://jmrlab.wordpress.com

Recent Presentations

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Chilli thrips (Scirtothrips dorsalis) Flower thrips (Frankliniella spp.)

Invasive
Early-season, warm temperatures
Foliar damage
Fruit damage
Two species:
F. bispinosa (Florida flower thrips)
Common, native, less damage
F. occidentalis (Western flower thrips)
Uncommon, invasive, more damage
Throughout the season
Flower damage
Fruit damage

Management of Radiant SC (spinetoram)

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Spray date Rotation 1 Rotation 2 Rotation 3 Rotation 4 Insecticide 5 Insecticide 6 Rotation 7 Insecticide 8 Insecticide 9 Insecticide 10 Rotation 11 Control 17-Nov Voliam flexi Voliam flexi Voliam flexi 2-Dec Radiant Radiant Radiant Radiant Apta Exirel Grandevo Minecto Pro Radiant Closer Radiant water 5-Dec Rimon 20-Dec Assail Assail Sivanto Assail Apta Exirel Radiant Minecto Pro Radiant Closer Closer water 8-Feb Radiant Radiant Assail Trilogy Apta Exirel Grandevo Minecto Pro Radiant Closer Radiant water 16-Feb Rimon Trilogy 24-Feb Assail Beleaf Malathion Trilogy Apta Exirel Radiant Minecto Pro Radiant Closer Closer water 10-Mar Radiant Sivanto Actara Radiant Apta Exirel Venerate Minecto Pro Radiant Closer Radiant water

Radiant – low rate, 6 fl oz/A Radiant – high rate, 10 fl oz/A Induce – non-ionic surfactant (0.25% v/v) used with all products & control except Grandevo, Venerate, Trilogy

How effective are unregistered insecticides? What are the most effective rotations of insecticides?

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Data:

thrips on leaves
aphids on leaves
thrips in flowers
thrips in green fruit
seed bug on plants (Feb-Mar)
leaf damage ratings
marketable yield
% damaged berries

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Data:

thrips on leaves
aphids on leaves
thrips in flowers
thrips in green fruit
seed bug on plants (Feb-Mar)
leaf damage ratings
marketable yield
% damaged berries

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18% 10% 35% 37%

1-Dec

54% 23% 1% 22%

16-Dec Chilli thrips Thrips larvae Florida flower thrips Bean thrips

93% 4% 0%3%

19-Jan

Thrips species distribution on leaves

Caliothrips fasciatus – American bean thrips

Found on strawberry in Brazil (one adult on a leaf in one location) (Pinent et al. 2011)
A pest of citrus in S. California – moves from weeds in fall, concern on exported navel oranges

94 thrips 347 thrips 142 thrips

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5 10 15 20 25

10-Nov 17-Nov 24-Nov 1-Dec 8-Dec 16-Dec 27-Dec 3-Jan 19-Jan

Number of all thrips per 10 trifoliates

Control Grandevo-Radiant Radiant-Assail Radiant-Closer VF-Radiant-Assail VF-Radiant-Rimon-Assail VF-Radiant-Sivanto VF 17-Nov All plots 2-Dec Rimon 5-Dec All plots 20-Dec

Voliam flexi (thiamethoxam + cholorantraniliprole) may slow the rate of thrips increase
Rimon (novaluron) + Radiant (spinetoram) has little added value over Radiant alone
Grandevo (1 app.) is not highly effective
Radiant low rate almost equally effective as Radiant high rate
Sivanto is equally effective as Assail (acetamiprid) as a second option

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5 10 15 20 25

10-Nov 17-Nov 24-Nov 1-Dec 8-Dec 16-Dec 27-Dec 3-Jan 19-Jan

Number of all thrips per 10 trifoliates

Control Closer Radiant Apta Exirel Minecto Pro 2-Dec 20-Dec

Closer (sulfoxaflor) is less effective than other tested products
Exirel (cyantraniliprole) & Apta (tolfenpyrad) & Minecto Pro (cyantraniliprole +

abamectin) are almost as effective as Radiant

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Thrips species distribution on leaves

46% 48% 4% 2%

9-Mar

16% 53% 29% 1% 0% 1%

24-Mar

52% 42% 5% 0% 1% 0%

16-Mar Chilli thrips Thrips larvae Florida flower thrips Western flower thrips Bean thrips Sixspotted thrips 153 thrips 230 thrips 115 thrips

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5 10 15 20 25

8-Feb 14-Feb 22-Feb 2-Mar 9-Mar 16-Mar 24-Mar

Number of all thrips per 10 trifoliates

Control Grandevo-Radiant-Venerate Trilogy-Trilogy-Trilogy-Radiant Radiant-Closer-Radiant Radiant-Beleaf-Sivanto Radiant-Rimon-Assail-Radiant Assail-Malathion-Actara All plots 8-Feb All plots 24-Feb Rimon & Trilogy 16-Feb All plots 10-Mar

Rotations without Radiant have higher thrips numbers than rotations with Radiant
Beleaf, Sivanto, (& Closer) are as effective as Assail as second options
Trilogy is moderately effective
Venerate suppresses thrips after a Radiant application

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5 10 15 20 25

8-Feb 14-Feb 22-Feb 2-Mar 9-Mar 16-Mar 24-Mar

Number of all thrips per 10 trifoliates

Control Closer Radiant Apta Exirel Minecto Pro 8-Feb 24-Feb 10-Mar

Closer (sulfoxaflor) alone is not effective
Exirel (cyantraniliprole) & Apta (tolfenpyrad) are almost as effective as Radiant
Minecto Pro (cyantraniliprole + abamectin) is as effective as Radiant

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0% 10% 20% 30% 40% 50% 60% 70% 80%

17-Feb 21-Feb 27-Feb 2-Mar 9-Mar 13-Mar 16-Mar 21-Mar Cracked & bronzed strawberries Radiant-Rimon-Assail-Radiant Radiant-Beleaf-Sivanto Assail-Malathion-Actara Trilogy-Trilogy-Trilogy-Radiant Apta Exirel Grandevo-Radiant-Venerate Minecto Pro Radiant Closer Radiant-Closer-Radiant Control All plots 8-Feb All plots 24-Feb Rimon & Trilogy 16-Feb All plots 10-Mar

High rates of damage: control & Closer (3 apps.)
Moderate rates of damage: Trilogy (3 apps.) + Radiant, Assail-Malathion-Actara
Low rates of damage: Apta (3 apps.), Exirel (3 apps)

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Dec. 28
Jan. 11
Jan. 11

Active on plastic, underneath leaves Adult: 1/8 – 3/16”

Pamera seed bug

(Neopamera bilobata)

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Compare mortality of seed bug exposed to insecticides on ripening fruit in the laboratory

Product active ingredient IRAC-MOA Rate % ai Surfactant (0.25%) Radiant SC spinetoram 5 6 oz/A 11.7 Induce Radiant SC spinetoram 5 10 oz/A 11.7 Induce Sivanto 200 SL flupyradifurone 4D 14 oz/A 17.1 Induce Beleaf 50 SG flonicamid 9C 2.8 oz/A 50.0 Induce Trilogy neem oil 256 oz/A (2%) 70.0 (none) Grandevo Chromobacterium subtsugae 3 lbs/A 30.0 (none) Venerate XC Burkholderia spp. 256 oz/A 94.5 (none) Control water

Induce

Control water

(none)

Washed, semi-ripe strawberries dipped for 15 s in insecticide solutions and dried before being placed with seed bug adults

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0% 20% 40% 60% 80% 100% 24h 48h 72h

Percent mortality

Radiant-high rate Radiant-low rate Trilogy Sivanto Beleaf Venerate Grandevo Control + Induce Control

a a a ab bc bc c c c

High mortality Moderate mortality No mortality Low mortality

Results

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Compare formulations of the active ingredient bifenazate for control of twospotted spider mite Products applied 17 February to small plots (10 m x 1 row) with a CO2 pressurized sprayer at 100 gal/A Spider mite motiles and eggs counted weekly from 10 trifoliates per plot

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10 20 30 40 50

16-Feb 24-Feb 3-Mar 10-Mar

UTC PortalXLO Banter50WDG Banter4SC Acramite50WS

Eggs per leaf

a b c c c a ab ab b b

2 4 6 8

16-Feb 24-Feb 3-Mar 10-Mar Pre-spray

UTC PortalXLO Banter50WDG Banter4SC Acramite50WS

Motiles per leaf

0% 10% 20% 30% 40% 50%

16-Feb 24-Feb 3-Mar 10-Mar

UTC PortalXLO Banter50WDG Banter4SC Acramite50WS

Leaves with eggs

a ab c abc bc a ab ab ab b

0% 10% 20% 30% 40% 50%

16-Feb 24-Feb 3-Mar 10-Mar Pre-spray

UTC PortalXLO Banter50WDG Banter4SC Acramite50WS

Leaves with motiles

a ab b b b a ab ab ab b a b

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Acknowledgements

Shashan Devkota Marc Santos Ryan Batts Deb Farr Braden Evans Babu Panthi Iris Strzyzewski Michael Hull Phanie Bonneau Rosa Ynfante Dow AgroSciences Nichino America Bayer Crop Science Syngenta US DuPont Crop Protection Marrone Bio Innovations United Phosphorus Inc. Arysta Life Sciences Specialty Crop Block Grant Program