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Sarao, P. S.
- Diversity of Natural Enemy Fauna in Rice Ecosystem in Relation to Different Levels of Nitrogen
Abstract Views :202 |
PDF Views:115
Authors
Affiliations
1 Department of Entomology, Punjab Agricultural University, Punjab, Ludhiana -141004, IN
2 Department of Plant Breeding, Genetics and Biotechnology, Punjab Agricultural University, Punjab, Ludhiana-141004, IN
3 Division of Entomology, Indian Agricultural Research Institute, New Delhi -110012, IN
1 Department of Entomology, Punjab Agricultural University, Punjab, Ludhiana -141004, IN
2 Department of Plant Breeding, Genetics and Biotechnology, Punjab Agricultural University, Punjab, Ludhiana-141004, IN
3 Division of Entomology, Indian Agricultural Research Institute, New Delhi -110012, IN
Source
Journal of Biological Control, Vol 22, No 1 (2008), Pagination: 125-130Abstract
Effect of nitrogen levels on the natural enemy fauna on rice variety PR118 was studied at Balloke village (Dist. Ludhiana) during kharif 2005 and 2006. The mean per cent populations of insect predators and parasitoids were higher at 103.69kg N ha−1 (225kg urea), whereas spider fauna was more abundant at higher dose of nitrogen (172.81kg N ha−1: 375kg urea). During 2005 and 2006, the overall diversity index in the crop season was higher (2.162 and 1.948, respectively) when higher dose of N was applied (172.81kg N ha−1).Keywords
Diversity, Insect Predators, Parasitoids, Nitrogen Level, Rice, Spider.Full Text
- Efficacy of Biopesticides Against Plant Hoppers in Direct Seeded Rice
Abstract Views :118 |
PDF Views:65
Authors
Affiliations
1 Punjab Agricultural University, Ludhiana - 141004, Punjab, IN
2 Punjab Agricultural University Regional Research Station, Gurdaspur - 143521, Punjab, IN
1 Punjab Agricultural University, Ludhiana - 141004, Punjab, IN
2 Punjab Agricultural University Regional Research Station, Gurdaspur - 143521, Punjab, IN
Source
Indian Journal of Entomology, Vol 84, No 4 (2022), Pagination: 847-849Abstract
This study evaluates the field efficacy of some biopesticides i.e., azadirachtin 1%EC @ 250, 500 & 750 ml, Bacillus thuringiensis @1500, 2000 & 2500 g, Beauveria bassiana 10%SC @2000, 2250 & 2500 ml and chlorpyriphos 20EC @2500 ml (check)/ ha against the brown plant hopper Nilaparvata lugens (Stål) and white backed plant hopper, Sogatella furcifera (Horváth) in direct seeded rice. The experiment was carried out at the Punjab Agricultural University, Ludhiana and Punjab Agricultural University Regional Research Station, Gurdaspur during 2017-18. It was observed that all tested biopesticides were found significantly effective. Beauveria bassiana @2500 ml/ ha was the most effective, while the maximum costbenefit ratio was obtained with chlorpyriphos 20EC @2500 ml (standard check) followed by azadirachtin 1% EC @250 and 500 ml/ ha. Despite less cost benefits, biopesticides can be safer to environment.Keywords
Rice, Nilaparvata lugens, Sogatella furcifera, azadirachtin, Beauveria bassiana, field efficacy, cost: benefits, chlorpyriphosFull Text
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