Presentation is loading. Please wait.

Presentation is loading. Please wait.

Insecticide Evaluations for Thrips Control In California Low Desert Onions During 2013 And a Three Year Research Summary Eric Natwick UC Cooperative Extension.

Similar presentations


Presentation on theme: "Insecticide Evaluations for Thrips Control In California Low Desert Onions During 2013 And a Three Year Research Summary Eric Natwick UC Cooperative Extension."— Presentation transcript:

1 Insecticide Evaluations for Thrips Control In California Low Desert Onions During 2013 And a Three Year Research Summary Eric Natwick UC Cooperative Extension Imperial County Supported by CA Garlic and Onion Research Advisory Board

2 2013 Thrips Control Efficacy Studies at UC Desert Research & Extension Center Two thrips insecticide efficacy trials were completed on dehydrator onions in Thrips species included: Western flower thrips (WFT) Frankliniella occidentalis (Pergande) and Onion thrips (OT) Thrips tabaci Lindeman Objective: evaluate insecticide efficacy against OT and WFT. Two experiments: 1)1 st convectional, synthetically derived insecticidal products. 2)2 nd primarily insecticides derived as products of a natural source or from microbial fermentation. Onion (White Creole) 6 seedlines per 40” beds sown on 19 Oct 2012; plots were 4- beds (13.3 ft) wide by 50 ft long. Insecticides applied using a Lee Spider Spray TracTractor 4-row sprayer with three TJ VS nozzles per row; 3 nozzles per bed delivering 53 gpa at 30 psi. The adjuvant, DyneAmic (Helena Chemical Co.), was added to all insecticidal spray mixtures at 0.25% vol/vol.

3 TreatmentRate/acreApplication Dates 1. Untreated Movento5.0 fl oz26 Feb, 12 & 25 Mar, 8Apr 3. Lannate LV48.0 fl oz26 Feb, 12 & 25 Mar, 8 Apr 4. Radiant SC7.5 fl oz26 Feb, 12 & 25 Mar, 8 Apr 5. Exirel 10SE13.5 fl oz26 Feb, 12 & 25 Mar, 8 Apr 6. Closer SC2.0 fl oz26 Feb, 12 & 25 Mar, 8 Apr 7. Closer SC r/w Radiant SC 2.0 fl oz 7.5 fl oz 26 Feb, 25 Mar 12 Mar & 8 Apr 8. Closer SC r/w Radiant SC r/w Lannate LV 2.0 fl oz 7.5 fl oz 48.0 fl oz 25 Feb, 8 Apr 12 Mar 25 Mar 9. Torac 15EC24.0 fl oz26 Feb, 12 & 25 Mar, 8 Apr 10. Torac 22 SC16.3 fl oz26 Feb, 12 & 25 Mar, 8 Apr 11. Torac 15EC f/b Radiant f/b Torac 15EC f/b Lannate LV 24.0 fl oz 7.5 fl oz 24.0 fl oz 48.0 fl oz 26 Feb 12 Mar 25 Mar 8 Apr 12. Exirel 10SE r/w Radiant SC 13.5 fl oz 7.5 fl oz 25 Feb, 25 Mar 12 Mar & 8 Apr 13. Exirel 10SE f/b Radiant SC f/b Lannate LV 13.5 fl oz 7.5 fl oz 48.0 fl oz 25 Feb, 8 Apr 12 Mar 25 Mar 14. Radiant SC r/w Movento r/w Lannate LV 7.5 fl oz 5.0 fl oz 48.0 fl oz 26 Feb, 8 Apr 12 Mar 25 Mar Conventional Insecticide Treatment Rates and Dates 37.8 ml/4gal (0.25 vol/vol) added to foliar spray mixtures.

4 TreatmentRate/acreApplication Dates Untreated Entrust SC 6.0 fl oz26 Feb, 12, 25 Mar & 8 Apr Aza-Direct + M-Pede 1.5 pt 2% v/v 26 Feb, 12, 25 Mar & 8 Apr Aza-Direct + M-Pede 2.0 pt 1% v/v 26 Feb, 12, 25 Mar & 8 Apr M-Pede2% v/v 26 Feb, 12, 25 Mar & 8 Apr Entrust SC f/b Agri-Mek 0.15EC f/b Aza-Direct 6.0 fl oz 12.0 fl oz 1.5 pt 26 Feb & 8 Apr 12 Mar 25 Mar Grandevo2.0 lb 26 Feb, 12, 25 Mar & 8 Apr Grandevo3.0 lb 26 Feb, 12, 25 Mar & 8 Apr MBI-206EP2.0 gal 26 Feb, 12, 25 Mar & 8 Apr MBI-206EP r/w Radiant 2.0 gal 7.0 fl oz 26 Feb, 25 Mar 12 Mar & 8 Apr Fermentation Product Insecticides: Treatment Rates and Application Dates 37.8 ml/4gal (0.25 vol/vol) added to foliar spray mixtures.

5 Larvae per 5 plants Conventional insecticides: Post treatment averages Thrips Larvae per 5 plants

6 Adult OT per 5 plants Conventional insecticides: Post treatment averages Adult OT per 5 plants

7 Adult WFT per 5 plants Conventional insecticides: post treatment WFT averages per 5 plants

8 Adult thrips per 5 plants Conventional insecticides: Post treatment averages All Adult Thrips per 5 plants

9 Thrips per 5 plants Conventional insecticides: Post treatment averages All Thrips per 5 plants

10 % OT Adults Conventional insecticides: Percentage of OT among all adult thrips

11 Percentage IYSV symptomatic plant, bulb yield as kg per acre and tons per acre M eans within columns followed by the same letter are not significantly different via LSD, P>0.05 Treatmentfl oz/a Percentage IYSVKg/0.002 acreTons per acre 17 Apr24 Apr1 May16 May Untreated a0.00 a4.00 a10.29 a11.34 a Movento a 1.00 a12.20 a13.45 a Lannate LV a0.00 a2.00 a13.95 a15.37 a Radiant SC a 2.00 a13.38 a14.74 a Exirel 10SE a0.00 a2.00 a14.15 a15.59 a Closer SC a a13.40 a Closer SC r/w Radiant SC a 5.00 a12.86 a14.18 a Closer SC r/w Radiant SC r/w Lannate LV a0.00 a a15.32 a Torac 15EC a 3.00 a10.72 a11.81 a Torac 22 SC a0.00 a2.00 a11.12 a12.25 a Torac 15EC f/b Radiant f/b Torac 15EC f/b Lannate LV a a16.44 a Exirel 10SE r/w Radiant SC a a14.47 a Exirel 10SE f/b Radiant SC f/b Lannate LV a0.00 a a13.05 a Radiant SC r/w Movento r/w Lannate LV a3.00 a1.00 a14.52 a16.01 a

12 Larvae / 5 plants Natural source insecticides: Post treatment averages Thrips Larvae per 5 plants a cd bc cd b b d bc b d

13 OT adults / 5 plants Natural source insecticides: Post treatment averages OT Adults per 5 plants

14 WFT adults / 5 plants Natural source insecticides: Post treatment averages WFT Adults per 5 plants

15 Adult thrips / 5 plants Natural source insecticides: Post treatment averages Adult Thrips per 5 plants

16 Thrips / 5 plants Natural source insecticides: Post treatment averages All Thrips per 5 plants

17 Treatmentfl oz/acre Percentage IYSV Onion Kg/0.002 acre Tons of onions per acre 17 Apr24 Apr1 May16 May Untreated a3.00 a0.00 a6.08 a6.70 a Entrust SC 6.0 fl oz0.00 a 1.00 a7.75 a8.54 a Aza-Direct + M-Pede 1.5 pt 2% v/v 0.00 a 7.30 a8.05 a Aza-Direct + M-Pede 2.0 pt 1% v/v 0.00 a 1.00 a6.04 a6.66 a M-Pede2% v/v 1.00 a 2.00 a7.91 a8.72 a Entrust SC f/b Agri-Mek 0.15EC f/b Aza-Direct 6.0 fl oz 12.0 fl oz 1.5 pt 5.00 a1.00 a3.00 a6.97 a7.68 a Grandevo2.0 lb 0.00 a 1.00 a5.87 a6.47 a Grandevo3.0 lb 0.00 a 7.13 a7.85 a MBI-206EP2.0 gal 0.00 a 8.32 a9.17 a MBI-206EP r/w Radiant 2.0 gal 7.0 fl oz 0.00 a 6.53 a7.19 a Natural Source Products: Percentage of IYSV symptomatic plants and Onion bulb yields, 2013 Means within columns followed by the same letter are not significantly different via LSD, P>0.05.

18 THRIPS MANAGEMENT IN ONIONS Don’t plant onions near small grain crops. Overhead irrigation may help suppress thrips populations. Control thrips before the early bulb. Onions can tolerate higher thrips populations near harvest. Randomly sample entire onion plants by pulling leaves apart and counting all thrips using a hand lens, on the inner leaves near the bulb, as well as those under the leaf folds. Sample at least 5 plants from 4 separate areas of the field. A suggested treatment threshold is 30 thrips per plant mid- season (lower for very young plants and higher for larger mature plants).

19 Conventional Insecticides for Thrips Control Tetronic & Tetramic acid derivatives (MoA interferes with lipid synthesis & IGR; 23) Movento ® (spirotetramat) Bayer CropScience Neonicotinoids (MoA nicotinic acetylcholine receptor agonist; A4) Assail (a.i. acetamiprid) Spinosyns: (MoA nicotinic acetylcholine receptor allosteric activator; 5) Success ® (a.i. spinosad) Dow AgroSciences Radiant ® SC (a.i. spinetoram) Dow AgroSciences Carbamates: (MoA acetylcholinesterase inhibitor; A1) Lannate ® (a.i. methomyl) DuPont Vydate ® (a.i. oxamyl) DuPont dry bulb onion supplemental label Pyrethroids: (MoA sodium channel modulator; 3) (several others not listed) Mustang ® (a.i. zeta-cypermethrin) FMC Corp. Warrior ® (a.i. lambda-cyhalothrin) Syngenta METI insecticides & acaricides: (MoA METI; 21A) Torac (a.i. tolfenpyrad; Nichino Americas) Not available; Check for a Section 18 Label Avermectins: (MoA cholride channel activator; 6) Agri-Mek (a.i. abamectin) Syngenta Others: (MoA Unknown) Grandevo (a.i. Chromobacterium subtsugae strain PRAA4-1) Marrone Bio Innovations, Inc. Aza-Direct (Gowan Company) & various other products with the a.i. Azadirachtin M-Pede (a.i. potassium salts of fatty acids) Gowan Company

20 Thrips Control Insecticides for Organic Production Spinosyns: (MoA 5) Entrust® (a.i. spinosad) Dow AgroSciences Insecticidal Soaps (membrane disruption) M-Pede (a.i. potassium salts of fatty acids) Gowan Company Others: (MoA Unknown) Grandevo (a.i. Chromobacterium subtsugae strain PRAA4-1) Marrone Bio Innovations, Inc. MBI-206EP (a.i. bacteria Burkholderia sp. strain A396 ) Not Registered in California at time of this publication Feb Aza-Direct (a.i. azadirachtin) (Gowan Company) & various other products with the a.i. Azadirachtin

21 Summary of my past three years thrips control research on onion Several new insecticidal active ingredients were evaluated for thrips control efficacy: Tolfenpyrad (Torac) not registered for use as of Feb Spirotetramat (Movento) Sulfoxaflor (Closer) not registered for use in California as of Feb Cyantraniliprole (Exirel) not registered for use as of Feb a.i. Chromobacterium subtsugae strain PRAA4-1 (Grandevo) a.i. bacteria Burkholderia sp. strain A396 (MBI-206EP) Evaluations of active ingredients from various IRAC MoA groups were evaluated as tank mixture partners Evaluations of active ingredients from various IRAC MoA groups were evaluated for overall efficacy in rotational schemes for efficacy against OT and WFT

22 ACKNOWLEDGEMENTS I wish to thank the California Garlic & Onion Research Advisory Board for their generous funding support of my thrips research. I also wish to thank the following agricultural crop protection chemicals companies for their generous in-kind support of supplying the products evaluated and for their generous monitory support of my thrips research on onions: Amvac Chemical CorporationHelena Chemical Co Bayer CropScienceMarrone Bio Innovations Inc. Dow AgroSciencesNichino America, Inc. DuPontSyngenta Crop Protection, LLC FMC CorporationUnited Phosphorus, Inc. Gowan Company


Download ppt "Insecticide Evaluations for Thrips Control In California Low Desert Onions During 2013 And a Three Year Research Summary Eric Natwick UC Cooperative Extension."

Similar presentations


Ads by Google