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Biological effects and field persistence of different insecticides in controlling the cotton mealybug, Phenacoccus solenopsis (Tinsley) (Hemiptera: Pseudococcidae)

Biological effects and field persistence of different insecticides in controlling the cotton... Abstract Cotton mealybug, Phenacoccus solenopsis (Tinsley), is an invasive pest threatening cotton crop. The efficacy and persistence of spirotetramat, sulfoxaflor, flonicamid, and buprofezin against the second-instar nymphs of P. solenopsis were evaluated under laboratory and greenhouse conditions. So far, there is no detailed information available on the sublethal effects of tested insecticides on the biological parameters of P. solenopsis, and thus, these effects at LC25 concentrations were assessed. In laboratory assays, sulfoxaflor was the most toxic, followed by spirotetramat and flonicamid; also, buprofezin was the least toxic on P. solenopsis nymphs after 48 h of exposure. Tested insecticides prolonged the developmental durations of treated nymphs and adult longevity for both sexes but significantly reduced female fecundity. Sulfoxaflor was the most persistent on cotton plants, whereas flonicamid was the lowest. Our findings indicated that tested insecticides could be regarded as promising candidates for establishing an effective control strategy to face P. solenopsis. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Phytopathology and Plant Protection Taylor & Francis

Biological effects and field persistence of different insecticides in controlling the cotton mealybug, Phenacoccus solenopsis (Tinsley) (Hemiptera: Pseudococcidae)

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Publisher
Taylor & Francis
Copyright
© 2023 Informa UK Limited, trading as Taylor & Francis Group
ISSN
1477-2906
eISSN
0323-5408
DOI
10.1080/03235408.2023.2207949
Publisher site
See Article on Publisher Site

Abstract

Abstract Cotton mealybug, Phenacoccus solenopsis (Tinsley), is an invasive pest threatening cotton crop. The efficacy and persistence of spirotetramat, sulfoxaflor, flonicamid, and buprofezin against the second-instar nymphs of P. solenopsis were evaluated under laboratory and greenhouse conditions. So far, there is no detailed information available on the sublethal effects of tested insecticides on the biological parameters of P. solenopsis, and thus, these effects at LC25 concentrations were assessed. In laboratory assays, sulfoxaflor was the most toxic, followed by spirotetramat and flonicamid; also, buprofezin was the least toxic on P. solenopsis nymphs after 48 h of exposure. Tested insecticides prolonged the developmental durations of treated nymphs and adult longevity for both sexes but significantly reduced female fecundity. Sulfoxaflor was the most persistent on cotton plants, whereas flonicamid was the lowest. Our findings indicated that tested insecticides could be regarded as promising candidates for establishing an effective control strategy to face P. solenopsis.

Journal

Archives of Phytopathology and Plant Protection – Taylor & Francis

Published: Apr 3, 2023

Keywords: Cotton mealybug; Phenacoccus solenopsis; pest control; persistence; sublethal effects; biology

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