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Chaudhary Charan Singh Haryana Agricultural University, Hisar

Chaudhary Charan Singh Haryana Agricultural University popularly known as HAU, is one of Asia's biggest agricultural universities, located at Hisar in the Indian state of Haryana. It is named after India's seventh Prime Minister, Chaudhary Charan Singh. It is a leader in agricultural research in India and contributed significantly to Green Revolution and White Revolution in India in the 1960s and 70s. It has a very large campus and has several research centres throughout the state. It won the Indian Council of Agricultural Research's Award for the Best Institute in 1997. HAU was initially a campus of Punjab Agricultural University, Ludhiana. After the formation of Haryana in 1966, it became an autonomous institution on February 2, 1970 through a Presidential Ordinance, later ratified as Haryana and Punjab Agricultural Universities Act, 1970, passed by the Lok Sabha on March 29, 1970. A. L. Fletcher, the first Vice-Chancellor of the university, was instrumental in its initial growth.

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Subject: Zoology × Author: Asha × End date: 2009 × Start date: 2000 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Incidence of varroa destructor anderson and trueman (Acari: Varroidae) and its management in apis mellifera L. colonies
    (CCSHAU, 2009) Asha; Gulati, Rachna
    Studies on seasonal incidence of V. destructor in A. mellifera colonies revealed two peaks in its population, one in second fortnight of May (63.27 mites/hive) and second in first fortnight of July (34.75 mites/hive). Mite fall on sticky paper and hive debris was more in warmer months (May to August) than in colder months (November to January). Between the two methods of sampling, sticky paper method was found significantly better (CD = 0.11; p = 0.05) as more number of mites (17.58 mites/hive) were recorded than in hive debris sampling (11.41 mites/hive). Among abiotic factors, the mite population was significantly positively correlated with the maximum and minimum temperature. Maximum numbers of brood cells (15-17%) and adult bees (8-9%) were infested with V. destructor in second fortnight of May. Mite infestation showed a significant positive correlation with perforation of brood (r = 0.65; 0.83) and bee deformity (r = 0.97; 0.81) in both the sampling methods and negative correlation with colony strength and stores. The decreasing order efficacy of the various treatment against V. destructor is screen floor (98.8%)> powdered sugar(3g/ frame) (97.7%)> oxalic acid (3% top bar method) (88.2%)> powdered sugar(2g/ frame) (87.2%)> sulphur dusting (200g/ hive) (85.7%)> mustard stem powder (5g/ hive) (77.9%)> oxalic acid (3% trickling method) (76.3%)> oxalic acid (3% cotton swab method) (75%)> formic acid 85% (71.7)> mustard stem ash (5g/ hive) (69.8%).