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Life cycle of Green leafhopper
Rice is the preferred host of N.virescens. Females lay eggs in the wings of leaf sheath in a mass of single rows obliquely placed and touching each other. Oviposition occurs mostly during the day.
Egg: The number of eggs laid in a mass varies from 6-8 and the fecundity is around about 365 eggs. The pre-oviposition period is about 6-9 days and the oviposition period 10-14 days. In ideal temperatures (200 C) the incubation period is about 7-9 days and the eggs hatch mostly between 6-9 hrs.
Nymph: There are 5 nymphal instars. Newly emerged nymphs are short bodied and yellowish white and they turn yellow or yellowish green after moulting. The nymphs which are evenly distributed on the plant generally feed on leaf sheaths and leaf blade. The average total nymphal period is around 16 – 19 days, each instar lasting for 2-3 days.
Adult : The average adult life span is about 25-26 days but sometimes reaches up to 46 days. Females live longer than males. Developmental stages and adult longevity are influenced by temperature and the optimum temperature for GLH development is 29-330 C.
INSECT PEST MANAGEMENT IN RICE IN INDIA . PASALU et.al., DIRECTORATE OF RICE RESEARCH RAJENDRANAGAR, HYDERABAD-30, A.P., INDIA
Field management of insect pests of rice - A ready reckoner. Technical Bulletin No.46, Directorate of Rice Research, Rajendranagar