Nirali J. Sanghani, G.R. Bhanderi* and R.D. Patel
Cotton Entomology, Main Cotton Research Station,
Navsari Agricultural University, Surat- 395007, Gujarat
Email: grbhanderi@yahoo.co.in
Received-05.06.2017, Revised-22.06.2017
Abstract: An experiment was conducted to determine the feeding potential of lady bird beetle, cheilomenes sexmaculata (Fab.) on cotton Mealy bug, Phenacoccus solenopsis under choice and no choice condition in the laboratory at Department of Agricultural Entomology, Navsari Agricultural University, Navsari during July–August, 2016. The results revealed that C. sexmaculata was mostly preferred eggs of P.solenopsis as compared to nymph and adult of mealybug. The per day prey consumption rate of larval and adult stage of C. sexmaculata werevaried from 35.00 to 44.00 (Av. 38.80±2.18) and 25.58 to 27.03 (Av. 26.38±0.35) eggs, 13.00 to 18.33 (Av. 14.97±1.47) and 15.52 (Av. 14.83±0.45) nymphs, and 9.67 to 14.00 (Av. 11.58±1.14) and 10.95 to 12.79 (Av. 12.02±0.40) adults of mealybug, respectively in no choice condition. In free choice feeding, grub of C. sexmaculata preferred eggs of mealybug more as compared to adult and nymph stage of mealybug. Which indicated by consumption of 65.55 ± 16.63 eggs, 10.75 ± 3.78 nymphs and 5.70±1.75 adults out of 82.00±21.04 (mixed stage) by larvae and 490.55±53.39 eggs, 139.35±15.56 nymphs and 93.25±7.72 adults out of 723.15±3.15 (mixed stage) by adult of C. sexmaculata on mealybug.
Keywords: Cheilomenes sexmaculata, Phenacoccus solenopsis, Feeding potential
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