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Journal of Entomology and Zoology Studies
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P-ISSN: 2349-6800, E-ISSN: 2320-7078

Journal of Entomology and Zoology Studies

2023, Vol. 11, Issue 5
The effectiveness of some selected insecticides against cotton mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) and their non-targeted predators

Mohamed El-Hosieny Mostafa, Naglaa Mohamed Youssef and Hanaa Mohamed Raghib

The invasive polyphagous cotton mealybug, Phenacoccus solenopsis Tinsley has emerged as a serious sucking pest of cotton. The laboratory and field bioassays of seven selected insecticides belonging to five toxicant groups were evaluated against P. solenopsis and their most abundant natural predators, Chrysoperla carnea (Steph.) and Hyperaspis vinciguerrae Capra. Based on the toxicity index the most toxic group of insecticides under laboratory conditions was esfenvalerate, acetamiprid and dimethoate after 24 h and 72 h of treatment followed by the oxadiazines metaflumizone, indoxacarb and finally the anti-moulting IGRs, diflubenzuron and chlorfluazuron against the 3rd instar nymphs of P. solenopsis using spraying method technique. Of the selected insecticides, dimethoate was significantly superior over the rest of treatments with a highest average reduction percentage in cotton mealybug population (98.26%) under field conditions followed by esfenvalerate (96.72%), indoxacarb (89.66%), metaflumizone (89.43%), acetamiprid (86.28%), diflubenzuron (81.51%), and the least one chlorfluazuron (76.82%). Field experiments recorded that the anti-moulting IGRs were the safer toxicants towards C. carnea with average reduction diflubenzuron (45.99%) and chlorfluazuron (25.68%) and towards H. vinciguerra, were diflubenzuron (49.39%) and chlorfluazuron (41.52%).
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Journal of Entomology and Zoology Studies Journal of Entomology and Zoology Studies
How to cite this article:
Mohamed El-Hosieny Mostafa, Naglaa Mohamed Youssef, Hanaa Mohamed Raghib. The effectiveness of some selected insecticides against cotton mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) and their non-targeted predators. J Entomol Zool Stud 2023;11(5):01-05. DOI: 10.22271/j.ento.2023.v11.i5a.9222

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