LIFE CYCLE OF RICE LEAF FOLDER, Cnaphalocrocis medinalis (GUENEE) ON RICE CULTIVAR HKR-47
Journal Title: International Journal of Agriculture Sciences - Year 2016, Vol 8, Issue 52
Abstract
The biology of Cnaphalocrocis medinalis, (Guenee) (Pyralidae:Lepidoptera) was studied in laboratory and screen house under agro-climatic conditions of Haryana, India. Incubation period was 5.32 days with egg viability of 55.31 to 77.33 per cent. Eggs were laid singly or in cluster of 2 to 4 and maximum (48.20 %) were laid on lower surface of leaf. Full grown larvae measured 15.59 mm in length and 1.22 mm in breadth. Male pupae were longer in length than female pupae. The pest completed its post embryonic development in 30.34 days (male) and 31.16 days (female) and passed through five larval instars. The larval survival was 56.66 per with 89.60 per cent moth emergence. Mean larval period was 22.10 days with pupal period of 6.86 (male) and 7.64 days (female), respectively. Pre-oviposition, oviposition and post oviposition periods were 1.7, 4.5, and 2.4 days, respectively. The longevity of male and female moth was 3.4 and 8.7 days, respectively with average fecundity of 100.6 eggs/female.
Authors and Affiliations
ANKIT KUMAR
Keywords
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