Synergism of Plant Oils with Different Insecticides against Pod Borer, Helicoverpa armigera (Hubner) Hardwick Infesting Chickpea

Abstract

Background: Gram pod borer, Helicoverpa armigera (Hubner) Hardwick has developed high level of resistance against so many insecticides due to some operational and biotic factors. The resistance can be managed by many ways among which adding of plant materials in insecticidal solution, which is having a synergistic effect, is one of the better ways to overcome this problem. Methods: In aim to break the resistance of insecticides towards this pest, an experiment was carried out to know the synergistic effect of different plant oils along with different insecticides against pod borer infesting chickpea at Junagadh Agricultural University, Junagadh (Gujarat) during two consecutive years i.e., 2017-18 and 2018-19. The experiment was laid in randomize block design having nine treatments (two oils and three insecticides) along with control. Result: The results revealed that the minimum (10.98 %) pod damage was observed in the treatment of chlorantraniliprole 18.5 SC 0.006 % + neem oil 0.5% which was found at par with flubendiamide 48 SC 0.015% + neem oil 0.5% (12.04 %). As far as the yield and economic is concern, highest (2634 kg/ha) yield and net realization (57,008 Rs /ha) was recorded in the treatment of chlorantraniliprole 18.5 SC 0.006 % + neem oil 0.5% followed by flubendiamide 48 SC 0.015% + neem oil 0.5% (2432 kg/ha and 45,934 Rs /ha ). The highest (1:10.33) ICBR was obtained in the treatment of chlorantraniliprole 18.5 SC 0.006 % + neem oil 0.5% followed by chlorantraniliprole 18.5 SC 0.006 % (1:9.36) and flubendiamide 48 SC 0.015% + neem oil 0.5% (1:7.13).