INTEGRATED MANAGEMENT OF ONION THRIPS, Thrips tabaci LINDEMAN (THYSANOPTERA: THRIPIDAE)
| dc.contributor.advisor | NARABENCHI, GANGADHAR | |
| dc.contributor.author | HALINGALI, SHWETA S. | |
| dc.contributor.other | GOPALI, JNANESHWAR B. | |
| dc.contributor.other | M. P., BASAVARAJAPPA | |
| dc.contributor.other | HADIMANI, H. P. | |
| dc.date.accessioned | 2020-10-27T07:09:20Z | |
| dc.date.available | 2020-10-27T07:09:20Z | |
| dc.date.issued | 2019-03 | |
| dc.description.abstract | The present investigation on the integrated management of onion thrips, Thrips tabaci Lindeman (Thysanoptera: Thripidae) was conducted during 2017-18 at Haveli farm, University of Horticultural Sciences, Bagalkot (Karnataka). Field evaluation of bio-inoculants, organic amendments and biorationals against onion thrips revealed that, two sprays of Lecanicillium lecanii (2 x 108 CFU/g) @ 2.0 g/l and azadirachtin 1500 ppm @ 3.0 ml/l at ten days interval were found to be superior in suppressing thrips population and also found safer to coccinellids and spiders prevailing in the cropping ecosystem. Further, L. lecanii @ 2.0 g/l recorded maximum yield (18.78 t/ha) and highest B:C ratio (2.67). The results obtained from biochemical analysis of the plants which received different bio-inoculants, organic amendments and biorationals against onion thrips revealed that the foliar application of Pseudomonas fluorescens @ 5.0 g/l found to enhance the resistance in onion plants as it was indicated higher amount of phenols and tannins as against other treatments. The field experiment on bio-efficacy of synthetic insecticides against onion thrips revealed that, three sprays of thiamethoxam 25 WG @ 25 g a.i./ha and imidacloprid 17.8 SL @ 22.25 g a.i./ ha at ten days interval were found to be superior in managing thrips on onion crop. Further, thiamethoxam 25 WG @ 25 g a.i./ha recorded maximum yield (25.39 t/ha), highest B:C ratio (3.58) and also found safer to the natural enemies as that of other evaluated insecticides. Among the different IPM modules evaluated against onion thrips, chemi-intensive module and adaptable IPM module were found to be superior in reducing thrips population. Whereas, adaptable IPM module comprising of soil application of neem cake @ 250 kg/ha at the time of transplantation, followed by foliar spray of P. fluorescens @ 5.0 g/l at 15 DAT, followed by lambda cyhalothrin 5 EC @ 12.50 g a.i./ ha at 25 DAT, L. lecanii @ 2.0 g/l at 35 DAT, thiamethoxam 25 WG @ 25 g a.i./ ha at 45 DAT recorded maximum yield (28.50 t/ha) and B:C ratio (3.51) as that of chemi-intensive module. Further, it found to be an effective, economical and relatively safer module. Hence, adaptable IPM module can be recommended for managing thrips on onion crop. | en_US |
| dc.identifier.issn | UHS16PGM747 | |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810153788 | |
| dc.keywords | ONION, T405 | en_US |
| dc.language.iso | English | en_US |
| dc.pages | 140 | en_US |
| dc.publisher | University of Horticultural Sciences, Bagalkot | en_US |
| dc.research.problem | Thesis | en_US |
| dc.sub | Entomology | en_US |
| dc.theme | INTEGRATED MANAGEMENT OF ONION THRIPS, Thrips tabaci LINDEMAN (THYSANOPTERA: THRIPIDAE) | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | INTEGRATED MANAGEMENT OF ONION THRIPS, Thrips tabaci LINDEMAN (THYSANOPTERA: THRIPIDAE) | en_US |
| dc.type | Thesis | en_US |