Evaluating combinations of bioinsecticides and adjuvants for managing Thrips tabaci (thysanoptera: Thripidae) in onion production systems

Iglesias, Lindsy E.; Groves, Russell L.; Bradford, Benjamin Z; Harding, Riley Suzanne; Nault, Brian A.

doi:10.1016/j.cropro.2020.105527

Cited by 11 publications

(8 citation statements)

References 48 publications

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“…However, efficacy depends on the biopesticide applied. Spinosad was the most effective biopesticide for reducing T. tabaci densities and improving bulb yield in New York and Wisconsin [46][47][48]55]. Several botanical extracts also have been evaluated for T. tabaci control in onions.…”

Section: Discussionmentioning

confidence: 99%

“…The OMRI-Listed insecticide treatments included (1) a tank mix of spinosad (Entrust ® SC) with neem oil (Trilogy ® ) and (2) unsprayed ("none", Table 1). The tank mix was chosen because it has been shown to reduced T. tabaci populations in organic onions in New York, United States [55]. Pesticides were applied using a CO 2 -pressurized backpack sprayer with a 1.2 m wide boom fitted with four twin-flat fan nozzles (TeeJet-60 8003VS, Spraying Systems, Wheaton, IL, USA) spaced 0.5 m apart and a walking speed of 1.2 m/s calibrated to deliver 337 L/ha at 276 kPa.…”

Section: Pesticides and Application Techniquementioning

confidence: 99%

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Management of Onion Thrips (Thrips tabaci) in Organic Onion Production Using Multiple IPM Tactics

Iglesias

Havey

Nault

2021

Insects

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Onion thrips (Thrips tabaci Lindeman) is a major pest in organic onion production and effective integrated pest management strategies are lacking. Our objective was to evaluate combinations of semi-glossy (“Rossa di Milano” and B5336AxB5351C) and waxy (“Bradley”) onion cultivars with reflective mulch, with or without biopesticides (spinosad + neem oil tank mix), to manage T. tabaci in organic onion production. Thrips densities were assessed weekly and bulbs graded and weighed at harvest. Onions sprayed with spinosad + neem oil had fewer T. tabaci (adults: 74% (2019); larvae: 40% (2018), 84% (2019) and produced higher yields (13% (2018), 23% (2019)) than onions that were unsprayed, regardless of mulch type or onion cultivar. “Rossa di Milano” had relatively fewer adult and larval thrips populations compared with “Bradley” (21% (2018), 32% (2019)) and B5336AxB5351C. However, “Rossa di Milano” had the lowest marketable yield in both years. Reflective mulch reduced densities on certain dates in both years compared to white mulch, but the largest and most consistent reduction only occurred in 2019. Reflective mulch had no impact on bulb yield. While spinosad + neem oil reduced thrips numbers and increased yield alone, none of the treatment combinations were effective at suppressing populations of thrips. Future T. tabaci management in organic onions will require optimization of the available effective biopesticides.

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Section: Discussionmentioning

confidence: 99%

Section: Pesticides and Application Techniquementioning

confidence: 99%

Management of Onion Thrips (Thrips tabaci) in Organic Onion Production Using Multiple IPM Tactics

Iglesias

Havey

Nault

2021

Insects

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“…In this study, an attempt was made to select various components to achieve a homogenous solution in addition to high insecticidal activity. This issue explains the logic behind the selection of properties used in investigation, where there is Rosemary crude extract with insecticidal properties [2] in combination with Triton ® X-100 as a non-ionic adjuvant [7], canola seed oil as a facilitator to insect cuticle penetration [8], succinic acid as a plant defense inducer against herbivores [9], and potassium nitrate as a stabilizer agent prepared [10]. According to observed results, the biopesticide formulation can lead to lower plant extracts usage because other components in the formulation act as auxiliary compounds.…”

Section: Resultsmentioning

confidence: 99%

A Novel Biopesticide Formulation for Organic Management of Aphis gossypii in Cucumber Greenhouses

et al. 2022

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“…Combination studies of spinosad with either bioinsecticides or adjuvants on onion field trials showed that spinosad was the most effective bioinsecticide with either neem oil or salts of fatty acids, providing the largest reductions (26-85%) in thrips densities and feeding damage (56-69%) as well as caused up to 26% increases in total onion yield (Iglesias et al, 2021).…”

Section: Field Experimentsmentioning

confidence: 99%

The Comparative Efficacy of Spinosad, Lufenuron and Hexythiazox on Some Strawberry Pests Under Laboratory and Field Conditions

Refaat

El-Sheikh

Ragheb

et al. 2021

Zagazig Journal of Agricultural Research

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The comparative efficacy of spinosad, lufenuron and hexythiazox on Spodoptera littoralis, thrips and aphids under laboratory and field conditions was carried out during this study. The toxicity and time-mortality relationship were investigated through testing a serious of prepared concentrations or recommended field rates. Data of mortality under laboratory conditions indicated that spinosad and lufenuron efficacy was highly similar in killing 90% of the tested instars while when compared at their corresponding LC 50 , spinosad showed 5.2 times lower in concentration than that of lufenuron after 72 h of treatment. Patterns of time-mortality showed generally that spinosad caused the highest mortality either with time or with concentrations followed by lufenuron taking time around 16 h to kill 50% of the tested 2 nd instar. Results of field experiments showed that spinosad and lufenuron caused more than 50 % reduction in thrips and aphid numbers after 10 days of treatment This show that both spinosad and lufenuron have almost the same effect against cotton leafworm, thrips and aphids and can be used wisely in IPM programs for pest control of pests infesting strawberry.

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Evaluating combinations of bioinsecticides and adjuvants for managing Thrips tabaci (thysanoptera: Thripidae) in onion production systems

Cited by 11 publications

References 48 publications

Management of Onion Thrips (Thrips tabaci) in Organic Onion Production Using Multiple IPM Tactics

Management of Onion Thrips (Thrips tabaci) in Organic Onion Production Using Multiple IPM Tactics

A Novel Biopesticide Formulation for Organic Management of Aphis gossypii in Cucumber Greenhouses

The Comparative Efficacy of Spinosad, Lufenuron and Hexythiazox on Some Strawberry Pests Under Laboratory and Field Conditions

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