SEASONAL INCIDENCE OF PINK BOLLWORM Pectinophora gossypiella (Saunders) IN COTTON
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Authors
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V. O. SWAROOPA REDDY, A. K. AWASTHI, G. A. DIANA GRACE* and ARCHANA KERKETTA
Department of Agricultural Entomology, BTC College of Agriculture and Research Station, Indira Gandhi Krishi Viswavidyala, Bilaspur- 495 001
Keywords:
Boll damage, Cotton, Pheromone trap catch, Pink bollwormAbstract
The field experiment was carried out during Kharif 2020-21 at Regional Agricultural Research
Station, Lam, Guntur. The research revealed that the peak activity of moth was observed during the
third week of December (51 SMW) with a trap catch of 441 moths/trap/week. The incidence of larvae
in green bolls was noticed from first fortnight of November (46 SMW) and increased gradually during
the first fortnight of December (51 SMW). The Green boll damage caused by pink bollworm ranged
between 20 percent and 90 percent with a mean of 26.52 percent. The Green locule damage caused
by pink bollworm ranged between 12.5 percent and 68.5 percent with a mean of 17.65 percent. The
population of pink bollworm larvae per 10 Green bolls ranged between 2 to 14 with a mean of 3.13
Larvae per 10 green bolls. It first appeared during second week of November (46 SMW). The highest
population of Larvae per 10 green bolls (14 Larvae per 10 green bolls) was observed at the time of
third week of December (51 SMW). The Pink bollworm Larvae per 10 green bolls have showed
significant negative correlation with minimum temperature (r= -0.661) and morning relative humidity
(r= -0.524).
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