STUDIES ON POPULATION DYNAMICS AND MANAGEMENT OF MANGO LEAFHOPPERS
| dc.contributor.advisor | GIRADDI, R. S. | |
| dc.contributor.advisor | GIRADDI, R. S. | |
| dc.contributor.advisor | GIRADDI, R. S. | |
| dc.contributor.author | GIRISH KUMAR, H. M. | |
| dc.contributor.author | GIRISH KUMAR, H. M. | |
| dc.contributor.author | GIRISH KUMAR, H. M. | |
| dc.date.accessioned | 2019-10-19T08:25:37Z | |
| dc.date.available | 2019-10-19T08:25:37Z | |
| dc.date.issued | 2001-08-06 | |
| dc.date.issued | 2001-08-06 | |
| dc.date.issued | 2001-08-06 | |
| dc.description.abstract | Studies on the population dynamics of mango leafhoppers conducted at Dharwad revealed the occurrence of three species of leafhoppers namely Amritodus atkinsoni (Leth.) Idioscopus nitidulus (Leth.) and Idioscopus clypealis (Leth.) throughout the year. The order of dominance was A. atkinsoni > I. nitidulus > I. clypealis. A. atkinsoni and /. nitidulus were the major species comprising 41.02 per cent and 40.18 per cent, respectively. The population of both A. atkinsoni and I. nitidulus shot up during November-December and maintained the peak activity upto March. On the contrary, I. clypealis remained at low density upto December first fortnight, there onwards increasing trend was seen upto January, later decline in population was noticed from January second fortnight. However the population again shot up from February second fortnight to March second fortnight. Among the three species I. clypealis had significant positive correlation with maximum temperature (r=0.532). Population of all the three species as well as total leafhopper numbers was negatively and significantly correlated to morning, afternoon and mean relative humidity. Dead leafhoppers due to incidence of Verticillium lecanii (Zimm.) Vieges were found attached to plant axils and also on the undersurface of leaves. The natural incidence varied from zero (2nd fortnight of November) to 5.79 per cent (2nd fortnight of October). Incidence of V. lecanii and morning afternoon and mean relative humidity were positively and significantly correlated. Field collected live leafhoppers carried infection by the entomopathogens, namely V. lecanii and Beauveria bassiana (Bals.) Vuill which was indicated by their development in PDA medium in the laboratory. Lambda cyhalothrin (0.5 ml/litre) and imidacloprid (0.25 ml/litre) were the most effective chemicals in reducing the population of the leafhoppers. Cypermethrin, profenofos, monocrotophos and acephate were the next to follow, whereas fipronil and endosulfan were the least effective treatments. Among the sequential sprays tried, sprays of Verticel followed with monocrotophos appeared to be promising in terms of reducing the pesticide load in the environment. | en_US |
| dc.description.abstract | Studies on the population dynamics of mango leafhoppers conducted at Dharwad revealed the occurrence of three species of leafhoppers namely Amritodus atkinsoni (Leth.) Idioscopus nitidulus (Leth.) and Idioscopus clypealis (Leth.) throughout the year. The order of dominance was A. atkinsoni > I. nitidulus > I. clypealis. A. atkinsoni and /. nitidulus were the major species comprising 41.02 per cent and 40.18 per cent, respectively. The population of both A. atkinsoni and I. nitidulus shot up during November-December and maintained the peak activity upto March. On the contrary, I. clypealis remained at low density upto December first fortnight, there onwards increasing trend was seen upto January, later decline in population was noticed from January second fortnight. However the population again shot up from February second fortnight to March second fortnight. Among the three species I. clypealis had significant positive correlation with maximum temperature (r=0.532). Population of all the three species as well as total leafhopper numbers was negatively and significantly correlated to morning, afternoon and mean relative humidity. Dead leafhoppers due to incidence of Verticillium lecanii (Zimm.) Vieges were found attached to plant axils and also on the undersurface of leaves. The natural incidence varied from zero (2nd fortnight of November) to 5.79 per cent (2nd fortnight of October). Incidence of V. lecanii and morning afternoon and mean relative humidity were positively and significantly correlated. Field collected live leafhoppers carried infection by the entomopathogens, namely V. lecanii and Beauveria bassiana (Bals.) Vuill which was indicated by their development in PDA medium in the laboratory. Lambda cyhalothrin (0.5 ml/litre) and imidacloprid (0.25 ml/litre) were the most effective chemicals in reducing the population of the leafhoppers. Cypermethrin, profenofos, monocrotophos and acephate were the next to follow, whereas fipronil and endosulfan were the least effective treatments. Among the sequential sprays tried, sprays of Verticel followed with monocrotophos appeared to be promising in terms of reducing the pesticide load in the environment. | en_US |
| dc.description.abstract | Studies on the population dynamics of mango leafhoppers conducted at Dharwad revealed the occurrence of three species of leafhoppers namely Amritodus atkinsoni (Leth.) Idioscopus nitidulus (Leth.) and Idioscopus clypealis (Leth.) throughout the year. The order of dominance was A. atkinsoni > I. nitidulus > I. clypealis. A. atkinsoni and /. nitidulus were the major species comprising 41.02 per cent and 40.18 per cent, respectively. The population of both A. atkinsoni and I. nitidulus shot up during November-December and maintained the peak activity upto March. On the contrary, I. clypealis remained at low density upto December first fortnight, there onwards increasing trend was seen upto January, later decline in population was noticed from January second fortnight. However the population again shot up from February second fortnight to March second fortnight. Among the three species I. clypealis had significant positive correlation with maximum temperature (r=0.532). Population of all the three species as well as total leafhopper numbers was negatively and significantly correlated to morning, afternoon and mean relative humidity. Dead leafhoppers due to incidence of Verticillium lecanii (Zimm.) Vieges were found attached to plant axils and also on the undersurface of leaves. The natural incidence varied from zero (2nd fortnight of November) to 5.79 per cent (2nd fortnight of October). Incidence of V. lecanii and morning afternoon and mean relative humidity were positively and significantly correlated. Field collected live leafhoppers carried infection by the entomopathogens, namely V. lecanii and Beauveria bassiana (Bals.) Vuill which was indicated by their development in PDA medium in the laboratory. Lambda cyhalothrin (0.5 ml/litre) and imidacloprid (0.25 ml/litre) were the most effective chemicals in reducing the population of the leafhoppers. Cypermethrin, profenofos, monocrotophos and acephate were the next to follow, whereas fipronil and endosulfan were the least effective treatments. Among the sequential sprays tried, sprays of Verticel followed with monocrotophos appeared to be promising in terms of reducing the pesticide load in the environment. | en_US |
| dc.identifier.other | Th-5941 | |
| dc.identifier.other | Th-5941 | |
| dc.identifier.other | Th-5941 | |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810132147 | |
| dc.keywords | STUDIES ON POPULATION DYNAMICS AND | en_US |
| dc.keywords | STUDIES ON POPULATION DYNAMICS AND | en_US |
| dc.keywords | STUDIES ON POPULATION DYNAMICS AND | en_US |
| dc.language.iso | en | en_US |
| dc.language.iso | en | en_US |
| dc.language.iso | en | en_US |
| dc.pages | 103 | en_US |
| dc.pages | 103 | en_US |
| dc.pages | 103 | en_US |
| dc.publisher | UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE | en_US |
| dc.publisher | UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE | en_US |
| dc.publisher | UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE | en_US |
| dc.sub | Agricultural Entomology | en_US |
| dc.sub | Agricultural Entomology | en_US |
| dc.sub | Agricultural Entomology | en_US |
| dc.subject | null | en_US |
| dc.subject | null | en_US |
| dc.subject | null | en_US |
| dc.theme | MANAGEMENT OF MANGO LEAFHOPPERS | en_US |
| dc.theme | MANAGEMENT OF MANGO LEAFHOPPERS | en_US |
| dc.theme | MANAGEMENT OF MANGO LEAFHOPPERS | en_US |
| dc.these.type | M.Sc | en_US |
| dc.these.type | M.Sc | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | STUDIES ON POPULATION DYNAMICS AND MANAGEMENT OF MANGO LEAFHOPPERS | en_US |
| dc.title | STUDIES ON POPULATION DYNAMICS AND MANAGEMENT OF MANGO LEAFHOPPERS | en_US |
| dc.title | STUDIES ON POPULATION DYNAMICS AND MANAGEMENT OF MANGO LEAFHOPPERS | en_US |
| dc.type | Thesis | en_US |