Nilaparvata fugens (Stal) vvas studied in the laboratory and its potentiality in biological
control was investigated. A female M. discc/or laid an average of 1 1 7.7 eggs in 25. 1 days
of oviposition period. Preoviposition period ranged from 5-1 O days vwith an average of 6, 6
days. The eggs hatched in 2-3 days with 83.7% hatching success. Predator had 4 larval
instars requiring a total period of 12-15 days. Mean developmental period of the predator …