LIFE CYCLE OF RICE LEAF FOLDER, Cnaphalocrocis medinalis (GUENEE) ON RICE CULTIVAR HKR-47

ANKIT KUMAR¹*, MAAN SINGH², RAM SINGH³, BANVIR SINGH^4
1Department of Entomology, CCS Haryana Agricultural University, Hisar, 125004, India
²Department of Entomology, CCS Haryana Agricultural University, Hisar, 125004, India
³Department of Entomology, CCS Haryana Agricultural University, Hisar, 125004, India
⁴Department of Entomology, CCS Haryana Agricultural University, Hisar, 125004, India
* Corresponding Author : ankit522@ymail.com

Received : 21-07-2016     Accepted : 02-09-2016     Published : 30-10-2016
Volume : 8     Issue : 52       Pages : 2488 - 2490
Int J Agr Sci 8.52 (2016):2488-2490

Keywords : Cnaphalocrocis medinalis, Rice, Fecundity, Hatchability, Incubation period
Academic Editor : Dr Shaik Jaffar Basha
Conflict of Interest : None declared
Acknowledgements/Funding : None declared
Author Contribution : None declared

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.