The toxic effect of camphor vapour against Aphis craccivora Koch (Hemiptera: Aphididae) and some of its natural enemies
Publish place: Journal of Crop Protection، Vol: 5، Issue: 1
Publish Year: 1394
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JCP-5-1_015
تاریخ نمایه سازی: 13 آبان 1402
Abstract:
Fumigant toxicity of camphor was studied against the aphid Aphis craccivora Koch and three associated natural enemies, i.e. Coccinella undecimpunctata L., Aphelinus albipodus Hayat & Fatima and Aphidius colemani Viereck. Aphis craccivora was the most tolerant one compared with all tested natural enemies as the recorded LC۵۰ values were ۱۲.۷۱, ۶.۳۳, ۱.۱۶ and ۰.۴۸ mg camphor/liter space for the above mentioned insects, respectively. Subjecting newly emerged adults of A. craccivora to LC۲۵ of camphor vapor significantly reduced female longevity from ۱۷.۶ to ۶.۴۵ days and reduced the female daily progeny from ۴.۴۴ to ۱.۹۳ nymph / female, which resulted in a reduction in productivity as finite rate of increase decreased from ۱.۵۷ to ۱.۱۴ female / female / day. Aphids that survived after subjection to LC۵۰ were found to have significantly higher amount of acid phosphatase and G. S-transferase than non-treated aphids. Inversely, Survived aphids were found to have significantly less amount of β-esterases and alkaline phosphatase than non-treated aphids; while no significant difference was found in case of α-esterases. Camphor fumigant can be a candidate as a control agent against A. craccivora but with restriction because of its drawbacks on natural enemies.
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Authors
Dalia Adly
Department of Biological Control, Plant Protection Research Institute, Agriculture Research Center, Giza, Egypt.
Ehab Bakr
Acarology Research Department, Plant Protection Research Institute, Agriculture Research Center, Giza, Egypt.
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