Studies on Bio-ecology of Major Insect-pests And Eco-friendly Management of Pod Borer in Vegetable Pea

Abstract

The present investigation entitled "Studies on bio-ecology of major insect-pests and ecofriendly management of pod borer in vegetable pea" carried out during from Nov 12, 2014 to March 13, 2015 at (old campus) S. V. P. Uni. of Agri. and Tech. Modipuram, Meerut. The result on Etiel/a zinckenel/a larval population reaches its peak (12.66 larvae/! 0 plants) in all control plots on 26'h February (8th standard weeks) when the maximum and minimum temperature 22.07°C and 12.55°C, respectively, relative humidity 81.07 and 11.72 mm was recorded. The larval population of E. zinckenella showed negative correlation with maximum temperature (r= -0.007), and positive with minimum temperature (r= 0.378), relative humidity (r= 0.313) and rainfall also showed positive correlation (r= 0.393) with larval population. The result on Helicoverpa armigera larval population reaches its peak (10.33 larvae/10 plants) in all control plots on 26'h February (8111 standard weeks) when the maximum and minimum temperature 22.07°C and 12.55°C, respectively, relative humidity 81.07 and 11.72 mm was recorded. The larval population of H. armigera showed negative correlation with maximum temperature (r= -0.034) while positive correlation with minimum temperature (r= 0.364), relative humidity (r= 0.351) and rainfall (r= 0.384) with larval population during crop season i.e. Rabi 2014-15. The biology of pea pod borer E. zinckenella completed thier life cycle in completed in 24-45 days .. it was observed that the incubation, larval, pupal period female and male logevity average 4.4, 17.9, l 0.6, 35.3 36.5 and 32.75days. The biology of pea pod borer H.armigera completed their life cycle completed in 36-65 days. it was observed that the incubation, larval, pupal period, female and male longevity average 3.3, 20.1,17.2, 52.3 and 47.2 days.The effect of various insecticides on C. septumpunctata population showed that bio-pesticides B. thuringiensis was found safer followed by Azadirachtin. The Indoxacarb was proved more toxic followed by Spinosad to C. septumpunctata population. Efficacy of different eco-friendly insecticides on the incidence of E. zinckenella Application of Indoxacarb @ 0.5 ml/liter was the most effective treatment in the controlling of pod infestation resulting lowest pod damage (2.69 per cent) and less effective Metarhizium 2 gm/litre with 9.31 per cent of pod borer infestation. Efficacy of different Eco-friendly insecticides on the incidence of H. armigera, Application of lndoxacarb @ 0.5 ml/liter was the most effective treatment in the controlling of pod infestation resulting lowest pod damage ( 1.66 per cent) and minimum effective treatment was Metarhizium 2 gm/litre with 7.33 per cent of pod borer infestation. The maximum and minimum yield obtanied from Indoxacarb @ 0.5 ml/liter and Metarhizium 2 gmlliter with 84.45 and 65.031 q/ha respectively. The C: B ratio maximum and minimum was obtained from Indoxacarb@ 0.5 mil~~ ~etarhizium 2 gm/liter with I: I 0. 74 and I: 1.93, respectively.