Incidence of Pink Bollworm Pectinophora gossypiella on different Bt cotton Hybrids under different Sowing Regimes

Author: Honnayya, Sreenivas A.G., Hemadri T., Kisan B., Harischandra Nayak and Saroja N.

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Abstract

The incidence of pink bollworm (Pectinophora gossypiella) is of significant importance in the context of agriculture, particularly in cotton-growing regions around the world. Pink bollworm is a destructive pest that primarily affects cotton crops, and its presence can have far-reaching consequences for both farmers and the cotton industry. Different sowing regimes, which include variations in the timing can have a significant impact on cotton yield and the prevalence of pests. Likewise, present investigation was conducted at the Centre for agro-climatic Studies, MARS, UAS Raichur, during Kharif-2019. Eight different Bt cotton hybrids were selected from the locally available market. They were used to estimate pink bollworm damage with two other dates of sowings in factorial randomized block design. The results revealed that among the different Bt cotton hybrids, the Bindaas-7213 hybrid recorded the lowest rosette flowers, green boll damage and locule damage (6.62, 21.62 and 18.72 %, respectively) were recorded in both regular and late sowing regimes. The lowest pink bollworm infestation at harvest was observed in normal sowing (39.80 GOBs/plant), with the highest seed cotton yield (16.99 q/ha) recorded in the Bindaas-7213 Bt hybrid. In contrast, the minimum seed cotton yield (10.23 q/ha) was recorded in the PCH-5678 Bt hybrid. The maximum pink bollworm infestation was noticed in the late sowing regime compared to the regular sowing regime.

Keywords

Agro-climate, factorial, hybrids pink bollworm and regime

Conclusion

The pink bollworm infestation was found to be lowest in Bindaas-7213 Bt cotton hybrid followed by Yuva-7215, whereas a maximum infestation in terms of rosette flowers, locule damage, green boll damage and bad opened bolls was found in PCH-5678 and ACH-1155 Bt hybrids at harvest was observed in late sown crop than normal sown crop.

References

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How to cite this article

Honnayya, Sreenivas A.G., Hemadri T., Kisan B., Harischandra Nayak and Saroja N. (2023). Incidence of Pink Bollworm Pectinophora gossypiella on different Bt cotton Hybrids under different Sowing Regimes. Biological Forum – An International Journal, 15(10): 807-812.