Biology and predatory habits of the lady bird beetle Stethorus keralicus Kapur (Coleoptera: Coccinellidae), predatory on the palm mite.
In laboratory investigations on the biology of Stethorus keralicus Kapur, the coccinellid was reared on the mite Raoiella indica Hirst (a pest of palms) on areca in February-March, when the temperature varied from 26 to 34 deg C and the relative humidity from 64 to 85%. Development from egg to adult occupied 12-14 days. Eggs hatched in 3-4 days, there were 3 larval moults, and the larval and pupal stages lasted 5-6 and 3.5-4 days, respectively. Adults and larvae fed on all stages of the mite, adults consuming 2.41-6.46 mites/h over a period of 24 h.