BIOEFFICACY AND PERSISTENCE OF ORGANIC/BOTANICALS AGAINST INSECTS OF BROWN SARSON AND THEIR EFFECT ON BENEFICIAL INSECTS
| dc.contributor.advisor | Sharma, Duni Chand | |
| dc.contributor.author | Priyanka | |
| dc.date.accessioned | 2019-01-31T08:46:27Z | |
| dc.date.available | 2019-01-31T08:46:27Z | |
| dc.date.issued | 2017-07-01 | |
| dc.description.abstract | Studies on the bioefficacy and persistent toxicity of organic/botanicals viz. cow urine (CU), eupatorium leaves extract in cow urine (ELECU), melia drupe extract in cow urine (MDECU), neem seed kernel extract in cow urine (NSKECU), melia leaf extract in cow urine (MLECU), melia and neem seed oil (NSO) against insect-pests infesting Brassica campestris var. brown sarson, effect of botanicals to major pollinators of brown sarson and coccinellids population and intrinsic toxicity of botanicals were carried out in Department of Entomology at Experimental farm of CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur during 2015-16 and 2016-17. Field efficacy studies revealed that NSKECU (10%) and NSO (0.3%) were found most effective against Lipaphis erysimi and Brevicoryne brassicae while cow urine (10%) was least effective. The persistent toxicity studies based on PT value for the year 2015-16 and 2016-17 revealed that the order of effectiveness of tested botanicals was: NSKECU (356.67, 360.00) > NSO (340.00, 346.68) > melia (319.99, 316.66) > MDECU (260.00, 266.67) > ELECU (246.67, 250.01) > MLECU (210.00, 216.67) > CU (160.00, 163.34) for L. erysimi and for Pieris brassicae, it was: NSO (356.66, 363.32) > NSKECU (340.00, 343.32) > melia (320.00, 319.99) > MDECU (256.67, 259.99) > ELECU (223.33, 229.98) > MLECU (180.00, 176.66) > CU (126.66, 126.66), respectively. The lethal concentrations computed against second instar nymph of L. erysimi revealed that among tested botanicals, melia was the most effective with LC50 and LC90 values of 0.0067 per cent and 0.0451 per cent, respectively followed by NSO (0.0601 and 0.3061%), NSKECU (1.9839 and 9.8204%), MDECU (2.8269 and 19.0092%), ELECU (3.2640 and 20.7982%), MLECU (4.3276 and 32.8192%) and CU (7.6909 and 111.5359 %), respectively. Comparative effect of botanicals on pollinator visits under field conditions showed that on zero day of spray, maximum per cent increase/decrease was in NSKECU (-79.04%) followed by NSO (-75.75%), melia (-72.01%), MDECU (-53.26%), ELECU (-50.05%), MLECU (-41.68%) and CU (-27.69%) as compared to check (3.85%), while for Coccinella septempunctata (adult and grub) maximum decrease was in case of NSKECU (-80.24 and -78.24%) followed by NSO (-66.50 and -75.19%), melia (-57.08 and -59.88%), MDECU (-42.92 and -50.00%), ELECU (-37.45 and -42.92%), MLECU (-33.33 and -33.50%) and CU (-19.82 and -28.33%). On the basis of intrinsic toxicity determined under laboratory conditions, the order of safety index for Apis mellifera obtained in descending order was (>4) in case of CU and MLECU, (>3.2) in MLECU, MDECU and melia, (>2) for NSKECU and NSO. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810093100 | |
| dc.keywords | Brown Sarson | en_US |
| dc.language.iso | en | en_US |
| dc.pages | 98 | en_US |
| dc.publisher | CSKHPKV, Palampur | en_US |
| dc.sub | Entomology | en_US |
| dc.subject | null | en_US |
| dc.theme | Bioefficacy and persistence of organic/botanicals against insects of Brown sarson | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | BIOEFFICACY AND PERSISTENCE OF ORGANIC/BOTANICALS AGAINST INSECTS OF BROWN SARSON AND THEIR EFFECT ON BENEFICIAL INSECTS | en_US |
| dc.type | Thesis | en_US |