Screening of Chickpea Cultivars and Evaluation of Botanicals Against Helicoverpa Armigera (Hubner) in Chickpea

Abstract

Thesis title: "Screening of chickpea cultivars and evaluation of botanicals against Helicoverpa armigera (Hubner) in chickpea" The experiments were carried out to screen the chickpea (Cicer arietinum) varieties in Augmented Design and evaluated the botanicals against H armigera in Randomized Block Design with three replications at Crop Research Centre of Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut during Rabi 2014-15. Screening of35 varieties on the basis of larval population and pod damage revealed that none of the variety found tolerant in response to pest attack. Only four varieties i.e. RSG 931, PANT G 114, RVG 203 and JG 14 were graded as moderate tolerant, whereas remaining 30 varieties as susceptible. The check variety sadbhawana was found highly susceptible with maximum larval population and pod damage. The larval population of H armigera was recorded during December to April from control plots and it reached its peak at the first week of April i.e. 15th standard weeks when maximum and minimum temperature were recorded 27.85 °C and 16.17 °C respectively, relative humidity (6728 %) and rainfall 3.77 mm. In the different treatments cypermethrin 25 EC @ 0.025% was found best treatment against H armigera with minimum number of larvae (0.26 and 0.46 larvae/5 plants) and pod damage (5.52 and 5.78 %). Among the botanicals, neem leaf extract in cow urine@ 20% was found more effective with minimum I¥Val population of 0.46 and 0.66 larvae/5 plants and pod damage of 7.08 and 8.89% at 3rd DAS and 9th DAS, respectively. The other effective botanicals were tobacco leaf extract in cow urine @ 20%, ginger extract in cow urine @ 20%, clerodendron leaf extract in cow urine@ 20%. The treatment cow urine (100%) was found less effective with maximum number of larval population and pod damage. The highest grain yield (1 0.80 qlha) was recorded in cypermethrin 25 EC@ 0.025% followed by neem leaf extract in cow urine@ 200AI (7.30 q/ha), the lowest yield (6.00 qlha) obtained from the treatment cow urine 100%. The maximum net income and highest cost benefit ratio (Rs/ha 15431.5 and 1:7.15) was found with cypermethrin 25 EC @ 0.025%. Among the botanicals, maximum net income and cost benefit ratio (Rslha 5177.0 and 1:3.98) was recorded with neem leaf extract in cow urine@ 20% and lowest (Rs!ha 1l24rJ5 and 1:1.13) income and cost benefit ratio was recorded with cow urine (lOOOAI).