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Role of grain protectants in integrated pest management of pulse beetle, Callosobruchus chinensis (L.) infesting greengram, Vigna radiata (L.) Wilczek



Role of grain protectants in integrated pest management of pulse beetle, Callosobruchus chinensis (L.) infesting greengram, Vigna radiata (L.) Wilczek



Research on Crops 8(2): 458-462



The effects of 11 grain protectants, namely neem seed kernel powder at 20 g (T<sub>1</sub>), neem oil at 10 ml (T<sub>2</sub>), mustard oil (T<sub>3</sub>) and groundnut oil (T<sub>4</sub>) at 7.5 ml each; turmeric powder at 3.5 g (T<sub>5</sub>), mustard oil+turmeric powder at 3.75 ml+1.75 g/kg seed (T<sub>6</sub>), groundnut oil+turmeric powder at 3.75 ml+1.75 g/kg seed (T<sub>7</sub>); and 7 cm covering with each of saw dust (T<sub>8</sub>), sandy soil (T<sub>9</sub>), dung cake ash (T<sub>10</sub>) and wheat husk covering (T<sub>11</sub>), were tested on egg laying, adult emergence and seed damage by Callosobruchus chinensis on treated and untreated (control) green gram seeds at 1, 35, 70 and 105 days after storage. Green gram seeds treated with all the grain protectants resulted in significantly lesser number of eggs laid by C. chinensis compared to the control after 1, 35, 70 and 105 days of storage. The minimum number of eggs (0 egg/500 seeds) was observed in T<sub>2</sub>, however, it was at par with T<sub>8</sub>, T<sub>9</sub>, and T<sub>10</sub>. T<sub>5</sub> (67 eggs/500 seeds) was the least effective, followed by T<sub>11</sub> (35 eggs), after 105 days of storage. All the grain protectants were significantly effective based on adult emergence and seed damage compared to the untreated control after 35, 70 and 105 days of storage. There were no adult emergence and seed damage after 105 days of storage with T<sub>2</sub>, T<sub>9</sub> and T<sub>10</sub>. The maximum (77.33) number of emerged adults and seed damage (7.20%) were recorded with T<sub>11</sub>. The use of these eco-friendly, inexpensive and easily available grain protectants will help in the management of stored grain pests, if incorporated in integrated pest management.

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Accession: 016955290

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