Thumbnail Image

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.

Browse

20091
Reset filters
Subject: Entomology × Author: Madhukarrao, Suradkar Vijaykumar × End date: 2009 × Start date: 2009 × Type: Thesis ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemOpen Access
    Evaluation of cowpea genotypes for resistance to leafhopper, empoasca kerri pruthi
    (CCSHAU, 2009) Madhukarrao, Suradkar Vijaykumar; Malik, V. S.
    The studies entitled “Evaluation of cowpea genotypes for resistance to leafhopper, Empoasca kerri Pruthi” were carried out in both field and laboratory conditions during 2008. Thirty genotypes of cowpea were evaluated for field resistance to leafhopper Empoasca kerri Pruthi. On the basis of nymph population at peak period of incidence, eight genotypes viz., CS-88 as resistant, IC-202790A and EC-17574-6 as moderately resistant, EC-394838 and HFC-42-1 as susceptible, V-240 and IC-5890 as highly susceptible and FS-68 as cultivated variety were selected to study their effect on the nymph survival and development. Various phytochemicals were also estimated to find out their influence on development and survival of leafhopper. The resistant genotypes harboured significantly (p < 0.05) less population of leafhopper nymphs than susceptible genotypes. Nymph survival was lower on resistant genotypes (57.04 to 66.66%) than that on susceptible genotypes (77.04 to 86.67%). The nymph period was 7.54 to 7.87 days on resistant genotypes greater than susceptible genotypes with nymph period of 5.63 to 6.11 days. Thus nymphs took 1.76- 1.91 days more to become adult on resistant genotypes than susceptible genotypes. It was found that the concentration of nitrogen, protein, total sugar, moisture, chlorophyll and zinc content was higher in susceptible genotypes as compared to resistant genotypes. On the other hand the concentrations of tannin, total phenol, potassium, phosphorus and iron were higher in resistant genotypes as compared to susceptible genotypes. But the concentration of copper did not show any significant difference between resistant and susceptible genotypes. Among biochemical constituents, zinc (r= 0.80) and chlorophyll content (r= 0.71) had positive and significant impact on nymph survival, whereas, tannin (r= -0.94), potassium (r= -0.81) and total phenol (r= -0.74) had negative and significant effect on leafhopper survival. The influence of zinc (r= -0.75) was negative and significant on nymph duration, but tannin (r= 0.89) and potassium (r= 0.80) manifest positive and significant correlation with nymph duration. Effect of moisture, nitrogen, protein, total sugar, phosphorus, copper and iron was nonsignificant on both survival and development of nymph of leafhopper.