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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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2014 - 20182
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Subject: Zoology × Author: Monika × Start date: 2010 ×
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    ThesisItemOpen Access
    Evaluation of management practices against Polyphagotarsonemus latus (Banks) and its role as vector of leaf curl virus in chilli
    (CCSHAU, 2018) Monika; Gulati, Rachna
    Under in vitro 35.00 to 67.27 and 33.89 to 63.89 percent mortality of P. latus was recorded in Direct Spray Bioassay, with 2.5 to 10.0 % and 1.25 to 10.0 % seed and leaf extract concentrations of P. pinnata, respectively. LC50 values of methanolic seed and leaf extract of P. pinnata were 5.36 and 5.31, respectively for mobile stages of P. latus. Under field conditions, the percent reduction in P. latus was from 40.60 to 72.55 percent with all the treatments concentration of P. pinnata. Under in vivo P. pinnata seed extract 10.0% (72.55%), was the most potent in reducing the mite population followed by P. pinnata leaf extract 10.0% (65.10 %), P. pinnata seed extract 7.5 % (62.66 %), P. pinnata seed extract 5.4 % (55.49%), P. pinnata leaf extract 7.5 % (54.98 %), P. pinnata seed extract 5.0 % (48.33%), P. pinnata leaf extract 5.3 % (47.58%), P. pinnata leaf extract 5.0 % (40.16%) and Pyriproxyfen 5% + Fenpropathrin 15% EC (1ml/l H2O) (37. 83%), respectively. Studies on seasonal incidence of P. latus revealed a peak in its population on chilli during second fortnight of October during the respective crop seasons in both the years under field conditions. Strata wise, top strata harboured significantly more number of mites followed by middle and bottom strata. A comparison of mulch treatments showed that Organic mulch 12t/ha was most effective in reduction of P. latus population (79.30 %), followed by Black/Silver polythene sheet (78.50 %), Black/White polythene sheet (78.30 %), Black polythene sheet (77.50 %), Organic mulch 9t/ha (74.70 %) and Organic mulch 6t/ha (65.30 %) treatment as compared to control. In terms of percent increase in yield, Organic mulch 12t/ha caused highest increase (57.90 % over control) followed by Black polythene sheet mulch, Black/Silver polythene sheet mulch, Black/White polythene sheet mulch, Organic mulch 9t/ha and Organic mulch 6t/ha showing 47.49, 46.72, 45.17, 42.47 and 34.36 percent increase over control. P. latus showed non-transmissible nature of virus. Thus it indicated that mite is not a carrier vector for transmission of leaf curl virus into chilli plant.
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    ThesisItemOpen Access
    Evaluation of chilli hybrids for resistance against mite, Polyphagotarsonemus latus (Banks) (Acari: Tarsonemidae)
    (CCSHAU, 2014) Monika; Gulati, Rachna
    Studies on the screening of fourteen chilli hybrids against Polyphagotarsonemus latus revealed wide difference in population of P. latus (2.53 to 6.28 mites per leaf), however, none of them was found immune to this pest. Among the hybrids, maximum population developed on hybrid 10/CHIhyb-7 (6.28 mites/leaf) followed by 5.70 mites/leaf on 10/CHIhyb-6; both were statistically comparable with each other but significantly higher than population recorded on other hybrids. Leaf wise, maximum population build up of P. latus was noticed on the top leaves (36.59 %) followed by middle (33.51 %) and bottom (29.89 %) chilli leaves. A peak in mite population was recorded in second fortnight of October (9.54 mites/ leaf), which afterwards showed a gradual decline in number. Hybrids 9/CHIhyb-4, 9/CHIhyb-10 and 9/CHIhyb-8 were marked the least susceptible hybrids; Kashi Anmol, 10/CHIhyb-3, 10/CHIhyb-5 and 10/CHIhyb-16 as slightly susceptible; 10/CHIhyb-2, 10/CHIhyb-9, 10/CHIhyb-10, 10/CHIhyb-11 and 10/CHIhyb-12 as moderately susceptible and 10/CHIhyb-6, 10/CHIhyb-7 as highly susceptible hybrids. A comparison of fertilizer treatments showed that farm yard manure @ 20t/ha was most effective, followed by vermicompost (5t/ha), poultry manure and neem cake (2t/ha) treatment as compared to NPK and control. P. latus population showed significant positive correlation with minimum temperature (r = 0.73), morning (r= 0.70) and evening actual vapour pressure (r= 0.65). Feeding by mites leads to formation of feeding patches, bronzing of leaves, downward curling, stunted growth, and elongation of petiole of older leaves along with younger small sized curled leaves. Negative and highly significant correlation was recorded between mite incidence and fruit number, fruit length and yield. Nitrogen, phosphorus, potassium, total sugar and non reducing sugars of chilli leaves showed a significant decline with increase in P. latus infestation whereas, phenol and reducing sugars increased in mite damaged leaves .