What does this research mean for the field?

Amitraz and several broad-spectrum pesticides exhibit high acute toxicity to the predatory mite Neoseiulus barkeri, and sublethal exposure to these chemicals significantly impairs the mite's development, reproduction, and population growth potential. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To measure the acute contact toxicity of 33 citrus pesticides and assess the sublethal effects of three broad-spectrum insecticides on the beneficial predatory mite Neoseiulus barkeri.

August 27, 2026InsectsOpen Access

Toxic and Sublethal Effects of Commonly Used Pesticides on Neoseiulus barkeri (Acari: Phytoseiidae)

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Authors

YCYu-Fei ChenSouthwest University ZWZhen WuSouthwest University YSYu-Chao ShenSouthwest University

Discussion

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Implication

Bioassay study demonstrates pesticide toxicity and sublethal reproductive impairment in Neoseiulus barkeri, suggesting critical trade-offs for citrus integrated pest management.

Key Points

To measure the acute contact toxicity of 33 citrus pesticides and assess the sublethal effects of three broad-spectrum insecticides on the beneficial predatory mite Neoseiulus barkeri.
Assessed the acute contact toxicity of 33 registered citrus pesticides using a four-well volcanic dish bioassay system to calculate median lethal concentrations (LC50).
Evaluated sublethal concentrations (LC10 and LC20) of chlorpyrifos, lambda-cyhalothrin, and chlorfenapyr on development duration, adult longevity, fecundity, and life table parameters (R0 and rm).
Amitraz was the most lethal chemical tested (LC50 = 55.92 mg/L), with chlorpyrifos, chlorfenapyr, lambda-cyhalothrin, glufosinate-ammonium, and beta-cyfluthrin also demonstrating high toxicity (LC50 values between 100 and 400 mg/L).
Exposure to LC20 concentrations of chlorpyrifos, lambda-cyhalothrin, or chlorfenapyr significantly prolonged mite developmental time, shortened female lifespan, and lowered egg production.
Sublethal LC20 exposures significantly reduced both the net reproductive rate (R0) and the intrinsic rate of increase (rm), impairing overall population growth potential.

Cite This Study

Chen et al. (2026) studied this question.

synapsesocial.com/papers/6a8fe99110c91c1e92621354 https://doi.org/10.3390/insects17090891

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August 27, 2026InsectsOpen Access

Toxic and Sublethal Effects of Commonly Used Pesticides on Neoseiulus barkeri (Acari: Phytoseiidae)

View Full Paper

Ask AI

Bookmark

Authors

YCYu-Fei ChenSouthwest University ZWZhen WuSouthwest University YSYu-Chao ShenSouthwest University

Discussion

Member takes

Implication

Bioassay study demonstrates pesticide toxicity and sublethal reproductive impairment in Neoseiulus barkeri, suggesting critical trade-offs for citrus integrated pest management.

Key Points

To measure the acute contact toxicity of 33 citrus pesticides and assess the sublethal effects of three broad-spectrum insecticides on the beneficial predatory mite Neoseiulus barkeri.
Assessed the acute contact toxicity of 33 registered citrus pesticides using a four-well volcanic dish bioassay system to calculate median lethal concentrations (LC50).
Evaluated sublethal concentrations (LC10 and LC20) of chlorpyrifos, lambda-cyhalothrin, and chlorfenapyr on development duration, adult longevity, fecundity, and life table parameters (R0 and rm).
Amitraz was the most lethal chemical tested (LC50 = 55.92 mg/L), with chlorpyrifos, chlorfenapyr, lambda-cyhalothrin, glufosinate-ammonium, and beta-cyfluthrin also demonstrating high toxicity (LC50 values between 100 and 400 mg/L).
Exposure to LC20 concentrations of chlorpyrifos, lambda-cyhalothrin, or chlorfenapyr significantly prolonged mite developmental time, shortened female lifespan, and lowered egg production.
Sublethal LC20 exposures significantly reduced both the net reproductive rate (R0) and the intrinsic rate of increase (rm), impairing overall population growth potential.

Cite This Study

Chen et al. (2026) studied this question.

synapsesocial.com/papers/6a8fe99110c91c1e92621354 https://doi.org/10.3390/insects17090891

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