Screening of rice germplasm against brown planthopper, Nilaparvata lugens (Stal.)

 

Screening of Rice germplasm against brown planthopper, <i>Nilaparvata lugens </i> (Stal.)

 

D.K. Sidde Gowda, Zonal Agricultural Research station, UAS(B), V.C. Farm, Mandya, Karnataka, India

 

Brown planthopper, <i>Nilaparvata lugens </i> (Stal.) is one among the fifteen important insect pests that cause serious concern to rice crop. The pest was first reported from Andhra Pradesh in 1927 and Karnataka in 1975. The severe outbreak of this pest was noticed during 2007 in parts of Cauvery command area in Karnataka and in 2008 in Haryana, Punjab and Delhi. The development of insect resistant rice varieties has been the prime priority under All India Coordinated rice improvement programme. Over a period of thirteen years (1996-2008), 645 and 2186 entries/cultivars were screened against   brown planthopper under plant hopper screening (PHS) and National screening nursery(NSN1)  trial respectively, both in green house and field.  The study revealed 158 donors possessing different levels of resistance to BPH. Rice cultivars IET 7575, IET 8116, IET 8110, IET 9912, IET 9873 and BPT 2217 were identified as resistant varieties and IET 7575 and  IET 8116 were released as BPH tolerant varieties for cultivation in Cauvery command area. KAUM 103-104-1, KAUM 95-1, RP 4656-IR73678-6-9-B, RP 4697-52-1-1182 and CR AC 34997 were found promising under retesting.  MTU-2077, IET-8110 and MTU-2070 identified as resistance to BPH in Tungabhadra project area. The results will be presented on the reaction of different entries to brown planthopper and possible mechanism of resistance will be discussed.