Feeding behaviour of Nilaparvata lugens on selected rice genotypes

Studies were carried out under glass house conditions to study the feeding behaviour of Brown Planthopper (BPH). Nilaparvata lugens on some selected rice genotypes. Feeding marks and feeding rate used as a reliable parameters to evaluate the resistance nature of the genotypes against insect pests. Low honeydew excretion and higher feeding marks was related to resistance of rice genotypes against BPH. The maximum number of feeding marks were observed on ARC 10550 (43.80) which was 4.52 times higher than TN 1 and it was followed by ARC 6650 (24.80) and KAU 1661 (24.00). The feeding rate BPH was assessed in terms of the amount of honeydew excreted. The amount of honeydew excreted is directly proportional to the amount of sap sucked by BPH. W 1263 recorded the lowest feeding rate of 84.62 mm² followed by ARC 6650 (129.70 mm²), IR 72 (144.17 mm²) and KAU 1661 (177.48 mm²).