Cotton Aphid Insecticide Efficacy Evaluation, 2002

Layton, M. B.; Long, John; Green, L. M.; Winters, S.

doi:10.1093/amt/28.1.f68

Cited by 3 publications

(2 citation statements)

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“…While previous studies have reported reduced efficacy of neonicotinoids to manage A. gossypii, [23][24][25][26][27][46][47][48] this is the first study to quantify imidacloprid resistance in the USA and examine the effect of landscape composition on observed LC 50 values. The results from this study confirmed a decrease in the susceptibility of A. gossypii to imidacloprid, which was more prevalent in cotton-dominated landscapes, and support the hypothesis that stronger selection for resistance occurs in landscapes dominated by a primary host crop that receives multiple applications of toxins with the same mode of action.…”

Section: Discussionmentioning

confidence: 99%

“…In recent years, there have been reports of reduced efficacy of imidacloprid to manage A. gossypii in Alabama (Jacobson, personal communication). Previous field experiments conducted in the mid-south showed reduced efficacy of several neonicotinoid active ingredients for managing A. gossypii, [23][24][25][26] but thiamethoxam was the only neonicotinoid active ingredient A. gossypii was reported to be resistant to at that time. 27 A. gossypii has a long history of insecticide resistance in productions systems where chemical control methods are frequently used.…”

Section: Introductionmentioning

confidence: 99%

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Imidacloprid‐resistant Aphis gossypii populations are more common in cotton‐dominated landscapes

Mahas

Steury

Huseth

et al. 2022

Pest Management Science

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BACKGROUND: Widespread reports of reduced efficacy of imidacloprid for managing cotton aphids (Aphis gossypii Glover) in cotton (Gossypium hirsutum L.) prompted an investigation to characterize the susceptibility of 43 populations over a 2-year period. The susceptibility of A. gossypii populations to imidacloprid was examined by calculating LC50 values. Further analyses related resistance assay results to a gradient of cotton production intensity.RESULTS: Concentration-mortality bioassays documencted populations that were 4.26-607.16 times more resistant than the susceptible laboratory population. There was a significant positive relationship between LC 50 values and percentage of cotton within 2.5-and 5-km buffers surrounding collection sites. No significant relationship was detected between LC 50 values and the percentage of alternative crop and noncrop hosts.CONCLUSION: Variable and high levels of resistance were detected in A. gossypii populations, and this variation was positively associated with cotton production intensity. Cotton is a host that may receive multiple applications of neonicotinoids (via seed treatment and foliar sprays) annually for seedling and mid-season pests. Rotating modes of action and limiting insecticide use should be implemented to delay the evolution of insecticide resistance in A. gossypii populations.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Imidacloprid‐resistant Aphis gossypii populations are more common in cotton‐dominated landscapes

Mahas

Steury

Huseth

et al. 2022

Pest Management Science

View full text Add to dashboard Cite

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Cotton Aphid (Heteroptera: Aphididae) Susceptibility to Commercial and Experimental Insecticides in the Southern United States

et al. 2013

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Cotton aphid, Aphis gossypii Glover, has a history of developing resistance to novel insecticides. A program is needed to monitor cotton aphid susceptibility to new insecticides. Concentration-mortality bioassays were conducted from 2008 to 2011 to monitor the susceptibility of cotton aphids from fields across the midsouthern United States to thiamethoxam and sulfoxaflor. Flonicamid was included in 2010 and 2011. Bioassays followed the procedures described by the Insecticide Resistance Action Committee for testing neonicotinoids against cotton aphid. Mortality was rated at 48 and 72 h. These bioassays suggest that high levels of resistance to thiamethoxam occur in cotton aphid throughout the midsouthern United States. Resistance ratios ranged from 0.9 to 562.6 at 48 h, and from 0.9 to 29.1 at 72 h. Aphid colonies tested were considered susceptible to flonicamid and sulfoxaflor. The LC50 values ranged from 1.43 to 6.60 ppm for flonicamid. The LC50 values for sulfoxaflor ranged from 1.01 to 5.85 ppm and 0.92-4.13 ppm at 48 and 72 h, respectively. These values represent the baseline variability of the susceptibility of cotton aphid to flonicamid and sulfoxaflor. The moderate level of variability observed combined with the high level of efficacy at low rates and the high reproductive rate of cotton aphid suggests that an effective resistance management plan needs to be devised for these insecticides. Flonicamid and sulfoxaflor should provide effective control of cotton aphid in areas where thiamethoxam resistance occurs. However, these insecticides need to be incorporated into a rotation strategy to preserve their efficacy against cotton aphid.

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Susceptibility Assessment of Cotton Aphid, Aphis gossypii (Hemiptera: Aphididae) Field Populations in Korea to 11 Insecticides

Kang,

Lee,

Kim

et al. 2023

kjps

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Cotton Aphid Insecticide Efficacy Evaluation, 2002

Cited by 3 publications

References 0 publications

Imidacloprid‐resistant Aphis gossypii populations are more common in cotton‐dominated landscapes

Imidacloprid‐resistant Aphis gossypii populations are more common in cotton‐dominated landscapes

Cotton Aphid (Heteroptera: Aphididae) Susceptibility to Commercial and Experimental Insecticides in the Southern United States

Susceptibility Assessment of Cotton Aphid, Aphis gossypii (Hemiptera: Aphididae) Field Populations in Korea to 11 Insecticides

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