Biorational Management of Gram Pod Borer, Helicoverpa armigera (Hubner) Infesting Chickpea

Author: Sheetal Kumawat, Shankar Lal Sharma, Heera Kumari, B.L. Naga, Maya Choudhary, R.K. Meena and Arvind

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Abstract

Chickpea is susceptible to a wide variety of insect pests, among which the gram caterpillar Helicoverpa armigera is a prominent adversary. Presently, farmers predominantly depend on pesticides as their primary method of controlling this pest. As pesticides are associated with numerous environmental risks, there is a growing emphasis on the significance of biorational products. The study aimed to evaluate the effectiveness of various biorational insecticides in controlling the infestation of the gram pod borer (Helicoverpa armigera, Hubner) in chickpea crop. As pesticides result in many environmental hazards, biorational products are given importance. In this study Malathion 50 EC (standard check), Spinosad 45 SC, Emamectin benzoate 5 SG, Neem oil 1%, Karanj oil 1%, NSKE 5%, Azadirachtin 0.03 EC, HaNPV 250LE, and Papaya leaf extract 5%5% were evaluated against H. armigera in chickpea in 2021-22. Incidence of H. armigera was significantly less in Malathion 50 EC (91.94%) followed by Spinosad 45 SC (82.24%), and Emamectin benzoate SG (78.75%). However, the Papaya leaf extract 5%treatment was the least effective options, showing a significantly lower reduction in larval population compared to other insecticides. The maximum seed yield of 15.78 q/ ha was recorded in Malathion 50 EC followed by Spinosad 45 EC and Emamectin benzoate 5 SG, 14.97, 13.94 q/ ha, respectively. Among these biorationals Spinosad 45 SC, Emamectin benzoate 5 SG provided the best result with the highest mean percentage larvae reduction and revealed the highest efficacy compared to other treatments, suggesting both Spinosad 45 SC and Emamectin benzoate 5 SG both might be used to manage H. armigera borer effectively.

Keywords

Bioefficacy, Biorational, Gram pod borer, HaNPV 250LE, Karanj oil, NSKE 5%, Spinosad 45 SC

Conclusion

The maximum seed yield (Table 2) was obtained in the treatment of Malathion 50 EC (15.78 q ha-1), followed by Spinosad 45 EC (14.97 q ha-1). The higher seed yield was also obtained in the treatment of Emamectin benzoate 5 SG (13.94 q ha-1), followed by Neem oil 1% (13.05 q ha-1) and Karanj oil 1% (12.96 q ha-1). The minimum seed yield of 12.50 q ha-1 and 11.96 q ha-1 was obtained in the treatments of NSKE 5% and Azadirachtin 0.03 EC, respectively. The least seed yield of 11.49 q ha-1 was obtained in the treatment of HaNPV 250LE, followed by Papaya leaf extract 5% (10.09 q ha-1).

References

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How to cite this article

Sheetal Kumawat, Shankar Lal Sharma, Heera Kumari, B.L. Naga, Maya Choudhary, R.K. Meena and Arvind (2023). Biorational Management of Gram Pod Borer, Helicoverpa armigera (Hubner) Infesting Chickpea. Biological Forum – An International Journal, 15(10): 990-994.