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

Thrips, spider mite and seed bug control with insecticides Justin Renkema Small Fruit Entomology Gulf Coast Research and Education Center

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Flower thrips ( Frankliniella spp.) Chilli thrips ( Scirtothrips dorsalis ) • Invasive • Two species: • Early-season, warm temperatures F. bispinosa (Florida flower thrips) • Foliar damage • Common, native, less damage • Fruit damage F. occidentalis (Western flower thrips) • Uncommon, invasive, more damage • Throughout the season Management of Radiant SC (spinetoram) • Flower damage • Fruit damage

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

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

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

Thrips species distribution on leaves 347 thrips 94 thrips 142 thrips 1-Dec 16-Dec 19-Jan 0%3% 4% 18% 22% 37% 1% 10% 54% 23% 93% 35% Chilli thrips Thrips larvae Florida flower thrips Bean thrips 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

• Voliam flexi (thiamethoxam + cholorantraniliprole) may slow the rate of thrips increase 25 • Rimon (novaluron) + Radiant (spinetoram) has little added value over Radiant alone • Grandevo (1 app.) is not highly effective Number of all thrips per 10 trifoliates 20 • Radiant low rate almost equally effective as Radiant high rate • Sivanto is equally effective as Assail (acetamiprid) as a second option Control Grandevo-Radiant 15 Radiant-Assail All plots 2-Dec Radiant-Closer Rimon VF-Radiant-Assail 10 All plots 5-Dec VF-Radiant-Rimon-Assail 20-Dec VF-Radiant-Sivanto VF 17-Nov 5 0 10-Nov 17-Nov 24-Nov 1-Dec 8-Dec 16-Dec 27-Dec 3-Jan 19-Jan

• Closer (sulfoxaflor) is less effective than other tested products 25 • Exirel (cyantraniliprole) & Apta (tolfenpyrad) & Minecto Pro (cyantraniliprole + abamectin) are almost as effective as Radiant Number of all thrips per 10 trifoliates 20 Control 15 Closer 2-Dec Radiant Apta 10 Exirel Minecto Pro 20-Dec 5 0 10-Nov 17-Nov 24-Nov 1-Dec 8-Dec 16-Dec 27-Dec 3-Jan 19-Jan

Thrips species distribution on leaves 153 thrips 230 thrips 115 thrips 9-Mar 16-Mar 24-Mar 1% 0% 1% 0% 0% 2% 1% 5% 4% 16% 29% 46% 52% 42% 48% 53% Chilli thrips Thrips larvae Florida flower thrips Western flower thrips Bean thrips Sixspotted thrips

• Rotations without Radiant have higher thrips numbers than rotations with Radiant 25 • Beleaf, Sivanto, (& Closer) are as effective as Assail as second options • Trilogy is moderately effective Number of all thrips per 10 trifoliates 20 • Venerate suppresses thrips after a Radiant application Control All plots Grandevo-Radiant-Venerate 15 10-Mar Trilogy-Trilogy-Trilogy-Radiant Radiant-Closer-Radiant Radiant-Beleaf-Sivanto 10 Radiant-Rimon-Assail-Radiant Assail-Malathion-Actara 5 Rimon & Trilogy All plots All plots 16-Feb 24-Feb 8-Feb 0 8-Feb 14-Feb 22-Feb 2-Mar 9-Mar 16-Mar 24-Mar

• Closer (sulfoxaflor) alone is not effective 25 • Exirel (cyantraniliprole) & Apta (tolfenpyrad) are almost as effective as Radiant • Minecto Pro (cyantraniliprole + abamectin) is as effective as Radiant Number of all thrips per 10 trifoliates 20 10-Mar Control 15 Closer Radiant Apta 10 Exirel Minecto Pro 5 8-Feb 24-Feb 0 8-Feb 14-Feb 22-Feb 2-Mar 9-Mar 16-Mar 24-Mar

• High rates of damage: control & Closer (3 apps.) • Moderate rates of damage: Trilogy (3 apps.) + Radiant, Assail-Malathion-Actara 80% • Low rates of damage: Apta (3 apps.), Exirel (3 apps) 70% Radiant-Rimon-Assail-Radiant Radiant-Beleaf-Sivanto Cracked & bronzed strawberries 60% Assail-Malathion-Actara Trilogy-Trilogy-Trilogy-Radiant All plots 50% All plots Rimon & 10-Mar Apta 8-Feb Trilogy Exirel 40% 16-Feb Grandevo-Radiant-Venerate 30% Minecto Pro All plots Radiant 24-Feb 20% Closer Radiant-Closer-Radiant 10% Control 0% 17-Feb 21-Feb 27-Feb 2-Mar 9-Mar 13-Mar 16-Mar 21-Mar

Pamera seed bug Jan. 11 Dec. 28 (Neopamera bilobata) Active on plastic, underneath leaves Jan. 11 Adult: 1/8 – 3/16”

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

Results 100% a a a Radiant-high rate 80% High Percent mortality Radiant-low rate mortality Trilogy ab 60% Sivanto Moderate mortality Beleaf 40% bc Venerate No mortality bc Grandevo 20% c Control + Induce Low mortality c c Control 0% 24h 48h 72h

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 CO 2 pressurized sprayer at 100 gal/A Spider mite motiles and eggs counted weekly from 10 trifoliates per plot

a a 50 50% Leaves with Eggs per eggs leaf 40 40% a a ab UTC UTC 30 30% PortalXLO PortalXLO Banter50WDG Banter50WDG ab 20 20% Banter4SC Banter4SC b Acramite50WS abc Acramite50WS 10 10% ab ab c ab bc ab b c c b c b 0 0% 16-Feb 24-Feb 3-Mar 10-Mar 16-Feb 24-Feb 3-Mar 10-Mar a 8 50% Leaves with Motiles per motiles leaf 40% a 6 30% UTC UTC a 4 PortalXLO PortalXLO 20% Banter50WDG Banter50WDG ab ab Banter4SC Banter4SC 2 Acramite50WS 10% Acramite50WS b b b ab b ab b 0 0% 16-Feb 24-Feb 3-Mar 10-Mar 16-Feb 24-Feb 3-Mar 10-Mar Pre-spray Pre-spray

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