SCREENING OF SELECTED RICE GENOTYPES FOR IDENTIFICATION OF RESISTANT DONOR LINES AGAINST BROWN PLANTHOPPER, Nilaparvata lugens (Stal)
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Fifty seven rice genotypes were screened following Standard Seedbox Screening Test (SSST), along with twoÂ resistant checks (PTB 33 and BM 71) and one susceptible check TN1 to assess the level of resistance to BPH infestation. TheÂ study was conducted at Rice Research Station, Hyderabad during 2019-2020.The test revealed that out of 57 rice genotypes,Â only three genotypes viz., Magic 289, RP 2068-18-3-5 and RNR 28370 exhibited damage score (DS) ranging from 1 to 3 and wereÂ designated as resistant (R). Five genotypes viz., Magic-88, Magic-179, IRUE 45, IRUE 52 and RNR 29325 exhibited moderateÂ resistance to BPH. The rest of 49 genotypes, 37 genotypes were identified as moderately susceptible with damage score rangingÂ between 5.1-7.0 while the remaining 12 genotypes were identified as susceptible with damage score of 7.1 to 8.9. FurtherÂ investigations on the mechanisms of resistance such as antixenosis, antibiosis and tolerance are required to identity the bestÂ genotypes that could be used for developing BPH resistant / tolerant variety with desirable yield and quality traits.