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G. C. Sharma , J. R. Thakur

Abstract

The alates of giant willow aphid Tuberolachnus salignus (Gmelin), a serious pest of willow (Salix spp) in the dry temperate zone of Himachal Pradesh first appeared on S. viminolis at Tabo (Lahaul and Spiti) in the first week of July. The progeny multiplied parthenogenetically throughout the period of infestation (July-December) by completing overlapping generations. The nymphal period and adult longevity varied from 12.4 to 27.4 and 20.6 to 42.4 days while fecundity was in the range of 15-50 nymphs per female depending on temperature which fluctuated between − 15 to 38 ° C. Alates appeared in the colonies from October to December but no sexuals were observed on Salix/I>.

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D. C. Joshi ¹, M. Y. Khan ², V. Lakshmanan ³, M. C. Prasad ⁴, G. C. Sharma ⁵

Affiliations
1 Indian Veterinary Research Institute, Izatnagar, 243121 (U.P.), IN
2 Division of Animal Nutrition, Indian Veterinary Research Institute, Izatnagar, 243121 (U.P.), IN
3 Division of Livestock Products Technology, Indian Veterinary Research Institute, Izatnagar, 243121 (U.P.), IN
4 Division of Pathology, Indian Veterinary Research Institute, Izatnagar, 243121 (U.P.), IN
5 AlCRP, Indian Veterinary Research Institute, Izatnagar, 243121 (U.P.), IN

Abstract

In an earlier study, carried out on about one year old male buffalo calves for nearly six monihs, Joshi et al observed that by gradual replacement nearly 80 per cent of the wheat straw consnmed by control animals, could be substituted by unground rice husk without affecting the growth of the animals. It was however, considered necessary to examine if the continued feeding of rice husk has any adverse effect on the internal organs of these animals. The study was there fore, extended for another 12 months and the results obtained are being reported in this communication.

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D. C. Joshi ¹, M. Y. Khan ², G. C. Sharma ³

Affiliations
1 Indian Veterinary Research Institute, Izatnagr - 243122, Utter Pradesh, IN
2 Division of Animal Nutrition, Indian Veterinary Research Institute, Izatnagr - 243122, Utter Pradesh, IN
3 AICRP, Indian Veterinary Research Institute, Izatnagr - 243122, Utter Pradesh, IN

Abstract

We are confronted with the situations of extreme scarcity of livestock feeds, in one or the other part of the country, when even straws are not available. We have to depend on other materials which are normally not used as livestock feeds. Rice husk is one such substance which is presently not being used as animal feed, though available in large quantities.

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