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Chaudhary Sarwan Kumar Himachal Pradesh Agriculture University, Palampur

Himachal Pradesh Krishi Vishvavidyalaya (renamed as Chaudhary Sarwan Kumar Himachal Pradesh Krishi Vishvavidyalaya in June, 2001) was established on 1st November, 1978.The College of Agriculture (established in May, 1966) formed the nucleus of the new farm University. It is ICAR accredited and ISO 9001:2015 certified institution. The Indian Council of Agricultural Research has ranked this University at eleventh place among all farm universities of the country. The University has been given the mandate for making provision for imparting education in agriculture and other allied branches of learning, furthering the advancement of learning and prosecution of research and undertaking extension of such sciences, especially to the rural people of Himachal Pradesh. Over the years, this University has contributed significantly in transforming the farm scenario of Himachal Pradesh. It has developed human resources, varieties and technologies and transferred these to farming community enabling the State to receive the “Krishikarman award” of Govt. of India four times in row for food grain production among small states of the country. Today, the State has earned its name for hill agricultural diversification and the farming community has imposed its faith in the University.

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Subject: Entomology × End date: 2016 × Start date: 2016 × Type: Thesis × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    BIOLOGY OF WHITEGRUBS IN RELATION TO PHYSICO-CHEMICAL PROPERTIES OF SOIL
    (CSKHPKV, Palampur, 2016-07-25) KUMAR, SWAROOP; Chandel, R. S.
    ABSTRACT In Himachal Pradesh, Brahmina coriacea, Holotrichia longipennis, Anomala dimidiata and Melolontha indica were found to be the important species endemic to Shimla, Kangra, Una and Mandi districts, respectively. The soil pH in the state ranged from 4.7 – 7.4, and organic carbon varied from 0.75 – 2.94 per cent. The observations on biology of B. coriacea, H. longipennis and A. dimidiata were recorded in soils collected from whitegrub endemic pockets. The incubation period was not affected by the soil type in any of the species, however, egg hatching was significantly affected ranging from 41.5 – 94.8 per cent in different species in different soils. The duration of first instar in B. coriacea and A. dimidiata, second instar in B. coriacea, H. longipennis and A. dimidiata and third instar in B. coriacea and H. longipennis was not affected in different soils. The duration of first instar in H. longipennis and third instar of A. dimidiata was significantly affected in different soils. Shortest duration of first instar of H. longipennis (11.7 days) and third instar of A. dimidiata (207.3 days) was recorded in Janjehli and Nauni soils, respectively. The larval survival differed significantly in most of the instars in different species. Overall value of larval growth index (0.22) was calculated to be maximum for B. coriacea in Seobagh soil. The pupal period in H. longipennis and A. dimidiata was not affected in different soils, but pupal survival in B. coriacea (16.7 – 81.0 %) and A. dimidiata (27.8 – 73.8 %), and pupal period in B. coriacea were significantly affected in different soils. The fecundity of B. coriacea was found to be maximum in Una soil. The females of H. longipennis and A. dimidiata deposited maximum eggs in Seobagh and Bharmour soils, respectively. Soil moisture conditions severely affected oviposition in different scarab species, and there was no egg laying at moisture percentage of ≥30 per cent. At 15 per cent soil moisture, significantly higher fecundity was recorded in all the species. Soil moisture at 15 per cent was found to be best for survival of grubs in all the species. The soil pH did not influence the incubation period, however, egg survival was significantly affected in B. coriacea (62.6 – 75.4 %) and A. dimidiata (59.9 – 84.1 %). In case of B. coriacea and A. dimidiata, higher egg survival was recorded at soil pH of 7.5. Duration of instars was not influenced by the soil pH, but larval survival was significantly affected in some species in some instars. Fecundity was not influenced by soil pH in B. coriacea and A. dimidiata, but in H. longipennis, significantly higher fecundity was recorded at pH 6.5. There was gradual decrease in hatchability of eggs with the increase in FYM in soil in all the species. Maximum egg hatching (74.91 – 81.46%) was recorded in soils having no FYM in different species. The larval survival was significantly affected in all the instars. Relatively higher survival of grubs was recorded at 0 – 25 per cent level of FYM in soil. The overall larval growth index was on higher side at 25 per cent level of FYM for B. coriacea (0.18) and H. longipennis (0.12). Fecundity of B. coriacea was recorded to be maximum (36.67 eggs/ female) at 25 per cent level of FYM, but in H. longipennis and A. dimidiata, the females deposited maximum eggs (59.0 and 42.33 eggs/female) in soils having no FYM.