author(s)
Soniya Joshi and SN Tiwari

abstract
Brown plant hopper, Nilaparvata lugens (Stal.), one of the major insect pest in paddy has developed resistance against the majority of insecticides which has created a new challenge for its management. Growing of BPH resistant varieties is an economical, environmentally safe and effective strategy to manage this pest. In the present study, 105 Plant Hopper Screening (PHS) and 25 Multiple Resistant Screening Trial (MRST) of rice genotypes were screened in the glasshouse conditions along with resistant (PTB-33) and susceptible checks Taichung Native-1(TN1). The standard seedbox screening method was used for the bulk screening of entries. The rating scale and level of resistance were adopted from the standard evaluation system for rice but the ranges for percent dead seedling were constructed to facilitate the rating based on percent seedling mortality due to BPH damage. According to observations, entries RP 2068-18-3-5, RP 6121Bphk17-2, IR 73382-80-9-3-13-2-2-1-3-B (HWR-16), IR 77390-6-2-18-2-B (HWR-39), RP 5690-20-6-3-2-1 and PTB-33 showed 15 % to 22.5% seedling mortality, and were moderately resistant.