SCREENING OF RICE CULTIVARS AGAINST BROWN PLANT HOPPER, Nilparvata lugens Nilparvata lugens Nilparvata lugens STAL. (HEMIPTERA: DELPHACIDAE)

Abstract

The results among 18 varieties on per cent hill damage due to brown plant hopper showed that GR-101, GR-102, GR-103, GR-104 considered as resistant (R) with 1 to 10 per cent hill damage, varieties GNR-3, GNR-2, GR-7, GAR-1 and Narmada considered as moderately resistant(MR) showed 11 to 25 per cent hill infestation. The varieties that recorded hill damage between 26 to 50 per cent were NAUR-1, GAR-2, GR-12 and IR-22 considered as moderately susceptible(MS). while varieties viz., IR-28, GR-11 and Masuri categoried as susceptible (S) with 51 to 75 per cent hill damage and the two varietied with more than 76 per cent hill damage viz., Jaya and Gurjari considered as highly susceptible (HS).