Bioefficacy of new ready mixed insecticide (novaluron 5.25% + indoxacarb 4.5%SC) against pigeon pea pod borer (Helicoverpa armigera Hubner)

摘要

The effect of different treatment schedules of Novaluron 5.25% + Indoxacarb 4.5% SC against pod borer of pigeon pea gave superlative effect over the sole insecticide Novaluron & Indoxacarb & standard check Lamda-cyhalothrin; though, all the treated plots with chemicals were significantly superior in their performance over that of control plots. Among the three selected dose of Novaluron 5.25% + Indoxacarb 4.5% SC (750, 825, 875 ml ha(-1)); the said chemical @ 875 ml ha(-1) was recorded as best in managing Helicoverpa armigera population up to harvesting period (mean 0.03% infested pod of both years), while, @ 825 ml ha(-1) also recorded remarkable effect on the target pest. The maximum yield (23.40 q ha(-1)) was obtained from the plots treated with Novaluron 5.25% + Indoxacarb 4.5% SC @ 875 ml ha(-1) closely followed by @ 825 ml ha(-1)(22.98 q ha(-1)). The yield increase was also of high order. Highest cost-benefit ratio (2.07) was recorded in Novaluron 5.25% + Indoxacarb 4.5% SC @ 825 ml ha(-1) closely followed by @ 875 ml ha(-1).