Disease management of bacterial blight of cotton through upland cotton (Gossypiumhirsutum) Germplasm andchemotherapuents under field conditions

摘要

Bacterial blight is becoming a devastating cotton disease due to the climate change in sub-continent regions. To grow resistant germplasm is an economical and effective tool to manage the disease. Thirty-one cotton varieties/lines were screened against bacterial blight of cotton disease under field conditions. Five varieties/lines viz. FH-142, FH-326, FH-Kehkishan, FH-468 and FH-152, exhibited resistant response against the disease.FH-344, FH-478, CIM-343,CIM-602, CIM-506, CIM-717 and MNH-992 were moderately resistant against the pathogen’s virulence. Ten varieties/lines (FH-466, FH-342, FH-312, FH-412, FH-498, FH-494, FH-458, Lalazar, CIM-616 and CIM-632) responded moderately susceptible response against bacterial blight disease. FH-490, FH-444, FH-Noor, FH-315 and FH-242 were susceptible against the disease. FH-91, VH-363, CIM-573 and CIM-620 were found highly susceptible to the disease. Four different chemicals {(Flare-72 SP (Streptomycin Sulphate), Thrill-20 % WP (Bismerthiazole), Kasumin 4% WP (Kasugamycin) and Copper Oxychloride 50WP (Copper Oxychloride) were evaluated against bacterial blight of cotton disease at 1g/L, 2.5 g/L, 4.8ml/L and 3g/L respectively. Flare-72 SP (Streptomycin Sulphate) was found the most effective against the disease as compared to the other chemicals.