Presentation on theme: "Research Advisory Board"— Presentation transcript:
1Research Advisory Board Insecticide Evaluations for Thrips Control In California Low Desert Onions During 2013 And a Three Year Research Summary Eric Natwick UC Cooperative Extension Imperial CountySupported byCA Garlic and OnionResearch Advisory Board
22013 Thrips Control Efficacy Studies at UC Desert Research & Extension Center Two thrips insecticide efficacy trials were completed on dehydrator onions in 2013.Thrips species included: Western flower thrips (WFT) Frankliniella occidentalis (Pergande) and Onion thrips (OT) Thrips tabaci LindemanObjective: evaluate insecticide efficacy against OT and WFT. Two experiments:1st convectional, synthetically derived insecticidal products.2nd 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.
3Conventional Insecticide Treatment Rates and Dates Rate/acreApplication Dates1. Untreated2. Movento5.0 fl oz26 Feb, 12 & 25 Mar, 8Apr3. Lannate LV48.0 fl oz26 Feb, 12 & 25 Mar, 8 Apr4. Radiant SC7.5 fl oz5. Exirel 10SE13.5 fl oz6. Closer SC2.0 fl oz7. Closer SC r/w Radiant SC2.0 fl oz fl oz26 Feb, 25 Mar Mar & 8 Apr8. Closer SC r/w Radiant SC r/w Lannate LV2.0 fl oz fl oz fl oz25 Feb, 8 Apr Mar Mar9. Torac 15EC24.0 fl oz10. Torac 22 SC16.3 fl oz11. Torac 15EC f/b Radiant f/b Torac 15EC f/b Lannate LV24.0 fl oz fl oz fl oz fl oz26 Feb Mar Mar Apr12. Exirel 10SE r/w Radiant SC13.5 fl oz fl oz25 Feb, 25 Mar Mar & 8 Apr13. Exirel 10SE f/b Radiant SC f/b Lannate LV13.5 fl oz fl oz fl oz14. Radiant SC r/w Movento r/w Lannate LV7.5 fl oz fl oz fl oz26 Feb, 8 Apr Mar MarConventional Insecticide Treatment Rates and Datesml/4gal (0.25 vol/vol) added to foliar spray mixtures.
5Conventional insecticides: Post treatment averages Thrips Larvae per 5 plants
6Conventional insecticides: Post treatment averages Adult OT per 5 plants
7Conventional insecticides: post treatment WFT averages per 5 plants Adult WFT per 5 plants
8Conventional insecticides: Post treatment averages All Adult Thrips per 5 plants
9Conventional insecticides: Post treatment averages All Thrips per 5 plants
10Conventional insecticides: Percentage of OT among all adult thrips % OT Adults
11Percentage IYSV symptomatic plant, bulb yield as kg per 0 Percentage IYSV symptomatic plant, bulb yield as kg per acre and tons per acreTreatmentfl oz/aPercentage IYSVKg/0.002 acreTons per acre17 Apr24 Apr1 May16 MayUntreated1.00 a0.00 a4.00 a10.29 a11.34 aMovento5.012.20 a13.45 aLannate LV48.02.00 a13.95 a15.37 aRadiant SC7.513.38 a14.74 aExirel 10SE13.514.15 a15.59 aCloser SC2.012.16 a13.40 aCloser SC r/w Radiant SC5.00 a12.86 a14.18 aCloser SC r/w Radiant SC r/w Lannate LV13.90 a15.32 aTorac 15EC24.03.00 a10.72 a11.81 aTorac 22 SC16.311.12 a12.25 aTorac 15EC f/b Radiant f/b Torac 15EC f/b Lannate LV14.91 a16.44 aExirel 10SE r/w Radiant SC13.13 a14.47 aExirel 10SE f/b Radiant SC f/b Lannate LV11.84 a13.05 aRadiant SC r/w Movento r/w Lannate LV14.52 a16.01 aMeans within columns followed by the same letter are not significantly different via LSD, P>0.05
12Natural source insecticides: Post treatment averages Thrips Larvae per 5 plants bbcbdbcdbccdaLarvae / 5 plants
13Natural source insecticides: Post treatment averages OT Adults per 5 plants OT adults / 5 plants
14Natural source insecticides: Post treatment averages WFT Adults per 5 plants WFT adults / 5 plants
15Natural source insecticides: Post treatment averages Adult Thrips per 5 plants Adult thrips / 5 plants
16Natural source insecticides: Post treatment averages All Thrips per 5 plants Thrips / 5 plants
17Natural Source Products: Percentage of IYSV symptomatic plants and Onion bulb yields, 2013 Treatmentfl oz/acrePercentage IYSVOnion Kg/ acreTons of onions per acre17 Apr24 Apr1 May16 MayUntreated0.00 a3.00 a6.08 a6.70 aEntrust SC6.0 fl oz1.00 a7.75 a8.54 aAza-Direct M-Pede1.5 pt 2% v/v7.30 a8.05 a2.0 pt 1% v/v6.04 a6.66 aM-Pede2% v/v2.00 a7.91 a8.72 aEntrust SC f/b Agri-Mek 0.15EC f/b Aza-Direct6.0 fl oz fl oz pt5.00 a6.97 a7.68 aGrandevo2.0 lb5.87 a6.47 a3.0 lb7.13 a7.85 aMBI-206EP2.0 gal8.32 a9.17 aMBI-206EP r/w Radiant2.0 gal fl oz6.53 a7.19 aMeans within columns followed by the same letter are not significantly different via LSD, P>0.05.
18THRIPS 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).
19Conventional Insecticides for Thrips Control Tetronic & Tetramic acid derivatives (MoA interferes with lipid synthesis & IGR; 23)Movento® (spirotetramat) Bayer CropScienceNeonicotinoids (MoA nicotinic acetylcholine receptor agonist; A4)Assail (a.i. acetamiprid)Spinosyns: (MoA nicotinic acetylcholine receptor allosteric activator; 5)Success® (a.i. spinosad) Dow AgroSciencesRadiant® SC (a.i. spinetoram) Dow AgroSciencesCarbamates: (MoA acetylcholinesterase inhibitor; A1)Lannate® (a.i. methomyl) DuPontVydate ® (a.i. oxamyl) DuPont dry bulb onion supplemental labelPyrethroids: (MoA sodium channel modulator; 3) (several others not listed)Mustang® (a.i. zeta-cypermethrin) FMC Corp.Warrior® (a.i. lambda-cyhalothrin) SyngentaMETI insecticides & acaricides: (MoA METI; 21A)Torac (a.i. tolfenpyrad; Nichino Americas) Not available; Check for a Section 18 LabelAvermectins: (MoA cholride channel activator; 6)Agri-Mek (a.i. abamectin) SyngentaOthers: (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. AzadirachtinM-Pede (a.i. potassium salts of fatty acids) Gowan Company
20Thrips Control Insecticides for Organic Production Spinosyns: (MoA 5)Entrust® (a.i. spinosad) Dow AgroSciencesInsecticidal Soaps (membrane disruption)M-Pede (a.i. potassium salts of fatty acids) Gowan CompanyOthers: (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 2014.Aza-Direct (a.i. azadirachtin) (Gowan Company) & various other products with the a.i. Azadirachtin
21Summary 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 2014.Spirotetramat (Movento)Sulfoxaflor (Closer) not registered for use in California as of Feb 2014.Cyantraniliprole (Exirel) not registered for use as of Feb 2014.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 partnersEvaluations of active ingredients from various IRAC MoA groups were evaluated for overall efficacy in rotational schemes for efficacy against OT and WFT
22ACKNOWLEDGEMENTSI 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 Corporation Helena Chemical CoBayer CropScience Marrone Bio Innovations Inc.Dow AgroSciences Nichino America, Inc.DuPont Syngenta Crop Protection, LLCFMC Corporation United Phosphorus, Inc.Gowan Company