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Feeding potential and biology of six spotted ladybird beetle Cheilomenes sexmaculata on cotton mealybug phenacoccus Solenopsis Geethu S, Suroshe Sachin S* Division of Entomology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012 *Email: sachinsuroshe@gmail.com
Online published on 21 July, 2020. Abstract The six spotted ladybird beetle Cheilomenes sexmaculata (F.) is a predator and its predatory potential is to be studied in detail. It was found that C. sexmaculata preferred second instar mealybug for predation. The most voracious predator was female followed by male and fourth instar. It was observed that per day consumption of grubs of all the stages decreased with increase in size of the mealybug. The feeding potential of larval instars of predator increased with their age. The studies on biology of C. sexmaculata on cotton mealybug Phenococcus solenopsis Tinsley will help us in knowing the weak and strong links for its proper use in biological control programme and also for its easy rearing in laboratory. Morphometric studies would help in construction of life tables and to know the effect of different rearing conditions on the physical fitness of the predator and also in selecting the preferred stage for its release. The total life span was maximum for mated females (73 days) than mated males (61 days) and unmated females (47 days) than unmated males (39 days). Top Keywords Biology, cotton mealybug, feeding potential, six spotted ladybird beetle. Top | |
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