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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 × Author: Negi, Nitika × Type: Thesis × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Bioefficacy studies of biorational approaches against Leucinodes orbonalis Guenee on brinjal in Himachal Pradesh
    (CSK HPKV, Palampur, 2023-01-16) Negi, Nitika; Sharma, Prem Chand
    Studies were carried out to know the incidence of Leucinodes orbonalis on brinjal in agro-climatic zone I and II of Himachal Pradesh and data on the incidence of L. orbonalis were recorded at monthly interval during 2019 and 2021. The crop was found to be infested with L. orbonalis at all the locations during both the years. Incidence of L. orbonalis appeared early in the month of May and remained up to the end of the season. The peak incidence of L. orbonalis was recorded in the month of July and August on shoots and fruits of brinjal during both the years. Among all the locations, Una district had a maximum shoot and fruit infestation (25.33 and 28.83%, respectively) during 2019, while in 2021 the maximum shoot infestation was recorded in Hamirpur district (26.50%) and fruit infestation in Kangra district (28.64%). The intrinsic toxicity studies against neonate larvae of L. orbonalis revealed emamectin benzoate as most toxic with LC50 value of 0.0043 ppm followed by spinosad (0.0303 ppm), Bacillus thuringiensis (3.989 ppm), azadirachtin (8.847 ppm), Brahmastra (24203.194 ppm) and Agniastra (29795.95 ppm). The field experiments were undertaken during the kharif season of 2020 and 2021 at the Experimental Farm of the Department of Entomology, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur. For the management of L. orbonalis, different approaches were evaluated under three modules, cultural & mechanical methods (M1), natural products & biopesticides (M2) and insecticides (M3). In Module 1, amongst seven treatments, minimum mean shoot infestation (9.33%) and fruit infestation (number as well as weight basis i.e., 12.68 and 13.86%) was recorded in neem cake (NC) + clipping of shoots. In Module 2, out of nine treatments, application of Bt resulted in least mean shoot infestation (13.56%), whereas fruit infestation on the number basis was minimum in neem cake + Azadirachtin; on the weight basis, neem cake + Bt recorded lowest per cent fruit infestation (15.27%). In case of Module 3, shoot infestation was minimum (6.40 %) in emamectin benzoate followed by neem cake + emamectin benzoate (6.70%) and spinosad (6.87%). On the basis of fruit infestation (number and weight), neem cake + application of emamectin benzoate resulted in lowest fruit infestation (9.39 and 8.85%) followed by emamectin benzoate (9.61 and 8.88%). On the basis of incremental output input ratio of two years, emamectin benzoate (27.27) was the most economically viable treatment followed by spinosad (10.82). After two applications of insecticides, the average initial deposits of emamectin benzoate (@10 g a.i./ha) were 0.307 ppm, whereas the average initial deposits of spinosad (@75 g a.i./ha) were 0.489 ppm. A waiting period of 4 days for emamectin benzoate and 2 days for spinosad was suggested for safe consumption of brinjal fruits.