Evaluation of Organic Extracts against Bollworm Complex of Cotton

Author: Pavan B. Somatkar, Sunil K. Bhalkare and Archana N. Borkar

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Abstract

An experiment was conducted to evaluate organic extracts against cotton bollworm complex at research farm of Department of Entomology, Dr. PDKV, Akola during Kharif, 2019. Experiment was laid in Randomized Block Design with seven organic extracts viz., Bramhastra extract @ 2 lit, Panchpatre extract @ 2.5 lit, Garlic–Chilli extract @ 2.5 lit, Broad-spectrum formulation @ 1.6 lit, Dr. PDKV Entomology formulation @ 2.5 lit, Neem seed extract @ 10 lit and Cow urine @ 12.5 lit per 100 lit of water along with a untreated control treatment. These treatments were applied thrice at 10 days interval. The observations on damage of bollworm complex were recorded at an interval of 3, 7 and 10 days after spraying while, damage by pink bollworm larva was recorded at 110 and 125 days after emergence of crop. Damage of bollworm complex on open boll was observed at each picking. Finally seed cotton yield was recorded from each treatment plot. According to the present study Dr. PDKV-Entomology formulation was more effective in minimizing the bollworm complex damage in green fruiting bodies. Untreated control showed maximum bollworm damage. Significantly minimum bollworm damage was recorded in treatment Dr. PDKV-Entomology formulation at harvesting. Cow urine was less effective in controlling bollworm damage and found statistically at par with untreated control. Highest seed cotton yield was obtained with Dr. PDKV-Entomology formulation. Brahmasthra extract was found most economical treatment with highest incremental cost benefit ratio (ICBR) followed by Dr. PDKV-Entomology formulation and Panchpatre extract. Results of present experiment indicated that the organic extracts can efficiently protect the cotton crop from bollworm complex

Keywords

Bollworm complex, Bramhastra extracts, Dr. PDKV-Entomology formulation, Panchpatre extract, Garlic-Chilli extract

Conclusion

Dr. PDKV-Entomology formulation was most effective with least bollworm complex damage in green fruiting bodies i.e. 4.09 per cent. Neem seed extract and Dr. PDKV- Entomology formulation reported least pink bollworm damage of 18.67 and 21.15 per cent in green bolls respectively. At harvesting minimum bollworm damage on open bolls was observed in plots treated with Dr. PDKV-Entomology formulation (25.17%) which was found at par with Brahmasthra extract (28.33%) and Panchpatre extract (34.00%). Dr. PDKV- Entomology formulation showed highest seed cotton yield of 12.10 q/ha. Brahmasthra extract emerged as the most economically viable treatment by giving the highest Incremental cost benefit ratio (ICBR) of 1:5.4

References

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How to cite this article

Pavan B. Somatkar, Sunil K. Bhalkare and Archana N. Borkar (2024). Evaluation of Organic Extracts against Bollworm Complex of Cotton. Biological Forum – An International Journal, 16(4): 119-123.