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N. Venugopal Rao ¹, A. S. Reddy ², D. D. R. Reddy ³

Affiliations
1 Regional Agricultural Research Station, Lam, Guntur 522 034, IN
2 Regional Agriculture Research Station, IN
3 Department of Entomology, College of Agriculture, IN

Abstract

The glabrous varieties of cotton favoured higher parasite activity on whitefly, recording more than 40 percent parasitisation, while hairy varieties recorded higher number of predatory mites. The integrated management programme involving natural insecticides of plant and animal origin was significantly superior in conserving the parasite and predatory populations compared to the existing (bollworm based) schedule as well 858 schedule involving some new and highly effective insecticides.

Keywords

Parasites, Predators, Bemisla tabaci, Cotton Varieties, Integrated Management Programme.

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N. Venugopal Rao ¹, A. S. Reddy ², D. D. R. Reddy ³

Affiliations
1 Regional Agricultural Research Station, Lam, Guntur 522034, A.P., IN
2 Regional Agricultural Research Station, Nandyal, IN
3 Department of Entomology, College of Agriculturc, Rajendranagar, Hyderabad 500 030, IN

Abstract

In an evaluation of the effects of different insecticides against the natural enemies of whitefly, Bemisia tabaci Genn., cotton crop treated with synthetic pyrethroids recorded 9.7 per cent parasitism due to aphelinid and it was on par with endosulfan. Pyrethroids were highly detrimental to the predators, recording the lowest number of 2 to 4.3 of early and 0.3 to 1.2 late occurring predators per 10 leaves. The insecticides of natural origin showed 15.8 to 18.1 per cent parasitoid activity and maintained 3.4 to 7.9 predators/l0 leaves. Triazophos and deltaphos recorded the lowest parasitism and predation levels, whereas fenpropethrin recorded a higher level (14.8 per cent) of parasitism.

Keywords

Aphelinid Parasitoid, Predators, Bemisia tabaci, Synthetic Pyrethroids, Natural Insecticides.

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M. Uma Reddy ¹, S. Rama Bharati ¹, D. D. R. Reddy ¹

Affiliations
1 College of Home Science, A.P. Agricultural University, Saifabad, Hyderabad 500 004, IN

Abstract

During storage of legumes, severe losses can occur due to the attack of pulse beetle (Collosobruchus chinensis). It has been estimated that the loss in weight of a seed of cow pea due to single larva of Collosobruchus maculatus can be between 3.3 to 5.6 per cent. Use of vegetable oils in protecting pulses during storage is a traditional practice. Several workers have studied the effectiveness of various oils as grain protectants and found to be effective. In the present study, an effort was made to test the efficacy of neem, mohua, palm oil and karanja oils as a pre-storage treatment to green gram and its effect on certain nutrients.

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M. Uma Reddy ¹, K. Aruna Reddy ¹, D. D. R. Reddy ¹

Affiliations
1 Department of Foods and Nutrition, College of Home Science, Acharya NG Ranga Agricultural University, Saifabad, Hyderabad - 500 004, IN

Abstract

Milled cereals are more susceptible to the hazards of storage such as moisture, temperature, fungi, bacteria, insects and other pests. Among the milled cereals, maida and suji are invariably infested by rust red flour beetle, Tribolium castaneum, which may start from the field, field drying, stacking, threshing, milling and transportation. The flour beetles cause discolouration of the flour, secrete off-smelling liquids into flour, contaminate by their cast skins, fecal pellets and uric acid resulting in urinary infections in mammals. The need for disinfection is particularly acute in warm countries, where insects breed rapidly.

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P. Lalitha ¹, M. Uma Reddy ¹, B. Narasimha Rao ¹, D. D. R. Reddy ¹

Affiliations
1 College of Home Science, Acharya N.G. Ranga Agricultural University, Hyderabad, IN

Abstract

Cauliflower (Brassica oleracea var. Botrytis Linn.) is severely attacked by several insect pests particularly diamond back moth, Plutella maculipennis Curtz., and aphids Lipaphis erysimi Katt. Several insecticides have been in usage against the insect pests of cauliflower and application of spray formulated of quinalphos proved to be very effective in controlling them. However, the dissipation of quinalphos on cauliflower curds and leaves is necessary for recommendation of its safe use. Hence, an attempt was made to determine the persistance of and the removal of quinalphos residues by processing procedures in cauliflower curds. Dissipation of quinalphos at room and refrigeration storage temperatures and its interaction with nutrients is also reported.

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