Feeding preferences of Nilaparvata lugens (BPH) on different rice genotypes using free-choice test at Jabalpur, Madhya Pradesh (India)

The study effectively demonstrated the differential response of rice genotypes to artificial infestation of brown plant hoppers (BPH). Feeding preference test screening of 73 rice genotypes, against brown plant hopper N. lugens was conducted in polyhouse using the standard seed box (fiber crates) method. Each tray contained 10 rows of test entries with 20 seedlings in each row. Two rows of check genotypes PTB-33 and TN-1 were sown in the middle and at the borders of crates. Second instar nymphs were released on 10 days old seedlings. The feeding preference and multiplication of N. lugens were recorded on every genotype when more than 90 percent TN-1 seedlings were killed by N. lugens. The observations on plant damage were completed 7-12 days after the release of insects. Damage to seedlings was rated on the basis of visual plant damage symptoms (0-9 scale). Six genotypes (IR 64, IGKVR 1244, R 2090-818-1-275-1, R 1700- 302-1-156-1, JRH-5 [Hybrid] and PTB 33) proved highly resistant against N. lugens. Twenty-two genotypes were resistant & sixteen genotypes were moderately resistant to N. lugens. By leveraging promising genetic material and advanced rearing techniques for N. lugens, sustainable pest management strategies can be achieved. Overall, the study reinforces the critical role of resistant genotypes in mitigating BPH damage and enhancing rice productivity in pest-prone regions.