STUDIES ON BIOEFFICACY OF SOME CHEMICAL INSECTICIDES AND BIOPESTICIDES AGAINST RICE YELLOW STEM BORER, Scirpophaga incertulas (WALKER) AND RICE LEAF FOLDER, Cnaphalocrocis medinalis (GUENEE) IN BASMATI RICE
| dc.contributor.advisor | Dr. Hem Singh | |
| dc.contributor.author | ANKUR PRAKASH VERMA | |
| dc.date.accessioned | 2023-12-26T17:01:59Z | |
| dc.date.available | 2023-12-26T17:01:59Z | |
| dc.date.issued | 2021-11 | |
| dc.description.abstract | Abstract Name of Student: Ankur Prakash Verma Id. No.: 4245 Major: Entomology Minor: Plant Pathology Degree: Ph.D. (Entomology) Department: Entomology Name of Advisor: Dr. Hem Singh Thesis Title: “Studies on bioefficacy of some chemical insecticides and biopesticides against Rice yellow stem borer, Scirpophaga incertulas (Walker) and Rice leaf folder, Cnaphalocrocis medinalis (Guenee) in basmati rice” The present investigation entitled “Studies on bioefficacy of some chemical insecticides and biopesticides against Rice yellow stem borer, Scirpophaga incertulas (Walker) and Rice leaf folder, Cnaphalocrocis medinalis (Guenee) in basmati rice” was carried out at Crop Research Centre (CRC) of Sardar Vallabhbhai Patel University of Agriculture & Technology, Meerut during Kharif, 2019 and 2020. During the crop season of both the year, eleven insects were majorly observed. Among these most damaging insect-pests were rice yellow stem borer, Scirpophaga incertulas and rice leaf folder, Cnaphalocrocis medinalis. According to pooled analysis of 2019 and 2020, the infestation by rice yellow stem borer was highest during 32nd SW i.e. 9.17% dead hearts while the lowest infestation was found during 29th SW i.e. 2.06% dead hearts. The infestation was non-significant positively correlated with minimum temperature (0.439) and average relative humidity (0.457) while non-significant negative with maximum temperature (-0.215) and rainfall (-0.210). The infestation by rice leaf folder was maximum during 34th SW with average leaf damage of 7.95% while the minimum was observed during 40th SW with 0.84% leaf damage. The infestation was significantly positively correlated with the minimum temperature (0.572) while non-significant positive with average relative humidity (0.438). Maximum temperature (-0.072) and rainfall (-0.077) showed non-significant negative correlation. Effect of various treatment application against yellow stem borer and leaf folder revealed that Fipronil 0.3 G @ 75 g a.i./ha. was the most effective treatment while Neem oil- Azadirachtin 0.03% w/w 300 ppm was the least effective during both the years. The application of different treatments does not cause any significant damage to the spiders and coccinellids population. Although Neem based biopesticides were most favourable to the natural enemies population. Highest yield was obtained from the Fipronil 0.3 G @ 75 g a.i./ha. (50.89 q/ha.) treated plots while the lowest was recorded on Neem oil- Azadirachtin 0.03% w/w 300 ppm (41.67 q/ha.) treated plots. As per the studies, the granular insecticides viz. Fipronil 0.3 G (1:3.42) and Cartap hydrochloride 4 G (1:3.35) were the most cost-effective treatment among all other treatments. (Hem Singh) (Ankur Prakash Verma) Advisor Author | |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810204520 | |
| dc.language.iso | English | |
| dc.pages | 138 | |
| dc.publisher | SARDAR VALLABHBHAI PATEL UNIVERSITY OF AGRICULTURE AND TECHNOLOGY, MEERUT- 250110 (U.P.), | |
| dc.sub | Entomology | |
| dc.theme | “Studies on bioefficacy of some chemical insecticides and biopesticides against Rice yellow stem borer, Scirpophaga incertulas (Walker) and Rice leaf folder, Cnaphalocrocis medinalis (Guenee) in basmati rice” | |
| dc.these.type | Ph.D | |
| dc.title | STUDIES ON BIOEFFICACY OF SOME CHEMICAL INSECTICIDES AND BIOPESTICIDES AGAINST RICE YELLOW STEM BORER, Scirpophaga incertulas (WALKER) AND RICE LEAF FOLDER, Cnaphalocrocis medinalis (GUENEE) IN BASMATI RICE | |
| dc.type | Thesis |