Effect of NPK Fertilization with Chemical Control on the Incidence of Yellow Stem Borer, Scirpophaga invertulas (Wlk.) and Grain Yield in Rice

摘要

The rice cv 'Swama' fertilized with NPK dose 60:30:30 kg/ha sustained minimum borer damage (4.78% DH and 5.68% WEH). Increased NPK fertilization from 60:30:30 to 120:60:60resulted in higher borer incidence. The crop raised under NPK dose 60:30:30 kg/ha coupled with carbosulfan protection recorded highest reduction of 56.90% and 69.20% in DH and WEH incidence over untreated control (F,L). Increase in fertilizer doses caused higher grain yield. The plot fertilized with 120:60:60 kg NPK/ha under carbosulfan protection yielded highest (4.46 t/ha) and the grain yield at par with that of fipronil treatment (4.37 t/ha).