Screening of French bean Varieties against Major Insect Pests

Abstract

Field screening of nine French bean varieties against major insect pests was conducted in RHRC, Narsingdi during November 2017 to January 2018. Results revealed that among high yielding varieties, BARI Jarsheem-2 (16.17 plant-1) and BARI Jarsheem-1 (17.50 plant-1) were found to have lower whitefly infestations and considered as less susceptible/tolerant to whitefly whereas among Sylhet local varieties, Sylhet local 3 variety (7.25 plant-1) was the least susceptible or most tolerant to whitefly. The highly susceptible varieties to whitefly were BARI Jarsheem-3 (20.92 plant-1) and Sylhet local 4 (14.92 plant-1), respectively. In case of jassid, among high yielding varieties, BARI Jarsheem-1 (3.75 plant-5) was less susceptible/tolerant to jassid and among Sylhet local varieties, Sylhet local 4 (3.00 plant-5) and 3 (2.25 plant-5) varieties were less susceptible or tolerant to jassid. The highly susceptible variety to jassid was BARI Jarsheem-3 (7.25 plant-5). All Sylhet local varieties of French bean had lowest number of leaf beetles/ 5 plants compared to high yielding varieties. Among high yielding varieties, BARI Jarsheem-1 and BARI Jarsheem-2 (3.75 plant-5) and 3.75 plant-5) had lowest number of leaf beetle/ 5 plants indicating less susceptible to leaf beetle compared to BARI Jarsheem-3 (4.75 plant-5). On the basis of yield performance, BARI Jarsheem-2 variety of French bean (1.51 ton ha-1) was the best and BARI Jarsheem-1 was better compared to BARI Jarsheem-3 and all other local varieties.