Eco-friendly Management of Major Insect Pests of Cabbage, Brassica oleracea var. capitata Linn.

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dc.contributor.advisorMeena, Ram Kishor
dc.contributor.authorChoudhary, Neetu
dc.date.accessioned2024-05-02T16:56:30Z
dc.date.available2024-05-02T16:56:30Z
dc.date.issued2022
dc.description.abstractThe investigation on ‘Eco-friendly Management of Major Insect Pests of Cabbage, Brassica oleracea var. capitata Linn’ under semi-arid condition was conducted at Horticulture Farm, S.K.N. College of Agriculture, Jobner (Rajasthan) during Rabi, 2021-22.The initiation of aphid population recorded in the third week of December which reached peak in third week of February (8th SMW) (160.4 aphid/plant), while, the initiation of diamondback moth population recorded in the third week of December (51nd SMW) which reached its peak in fourth week of February, i.e. 9 th SMW (4.5 DBM larvae/10 plants) when maximum temperature, minimum temperature and relative humidity was 31.0 and 8.1°C, 50 per cent and sun shine (9.5 hrs), respectively and gradually declined thereafter. Flea beetle, the initiation of flea beetle population recorded in the first week of January (1st SMW) which reached its peak in fourth week of February, (10.1 flea beetle/10 plants) and gradually declined thereafter. Painted bug, the initiation of painted bug population recorded in the fourth week of November (48th SMW) which reached its peak in fourth week of February, (5.2 painted bug/10 plants) and gradually declined thereafter. The natural enemy of Coccinella septempunctata, the initiation of C. septempunctata population recorded in the second week of December (50 th SMW) which reached its peak in fourth week of February, (3.9 /10 plants). The relationship between aphid L. erysimi, with maximum temperature, minimum temperature, and relative humidity had showed negative correlation (r = -0.193, r = -0.149 and r = -0.139), diamondback moth, Plutella xylostella (L.) and painted bug Bagradacruciferarum (Kirk.) had showed that positive correlation (r = 0.446, r = 0.308, r = 0.709 and r = 0.783, r = 0.419, r = 0.798) with maximum temperature, minimum temperature and sun shine, respectively, while, had showed negative significant correlation (r = -0.588 and r = -0.798, respectively) with relative humidity; flea beetle, Phyllotreta cruciferae (Goeze.) population with maximum temperature and sun shine had showed positive correlation (r = 0.188 and r = 0.580), while relative humidity had showed negative correlation (r = -0.344). While, maximum temperature, minimum temperature and sun shine population showed positive correlation (r=0.211, r= 0.151 and r= 0.483) with Coccinella septempunctata and negative non-significant correlation with abiotic factor viz., relative humidity. The experiment on effect of intercrops on the incidence of major insect pests showed that all intercrop combinations harboured the lesser population of major insect pests (aphid and diamondback moth) than the sole crop. The cabbage + onion and cabbage + tomato intercrop combinations were significantly less conducive to aphid and diamondback moth infestation as compared to other intercrop combinations. The maximum cabbage equivalent yield (173.72 q/ha) was obtained from the treatment onion as an intercrop at 4:1 ratio which was significantly superior over rest of the treatments except the treatment tomato as intercrop which recorded in cabbage with equivalent yield (149.05 q/ha). The efficacy of nine biopesticides tested against major insect pests of cabbage revealed that azadirachtin 1% EC proved to be the most effective followed by azadirachtin 0.03% EC and Neem oil. The treatments of Beauveria bassiana 1.15 WP, NSKE 5% and Metarhizium anisopliae 1.15 WP stood in middle order of efficacy followed by the treatments of Karanj oil, and Verticillium lecanii 1.15 WP which were proved to be least effective against aphid and diamondback moth of cabbage. The maximum per cent avoidable loss was found to be (18.69%) in the treatment of azadirachtin 1% EC, whereas, minimum in untreated control. The highest benefit cost ratio was found in the azadirachtin 1% EC (8.79) followed by NSKE and azadirachtin 0.03% EC. The yield showed that azadirachtin 1% EC treated plants maximum yielded and it was followed by azadirachtin 0.03% EC and Neem oil.
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810208620
dc.keywordsEco-friendly Management
dc.keywordsMajor Insect Pests of Cabbage
dc.keywordsBrassica oleracea var. capitata Linn
dc.language.isoEnglish
dc.research.problemEco-friendly Management of Major Insect Pests of Cabbage, Brassica oleracea var. capitata Linn.
dc.subEntomology
dc.themeEco-friendly Management of Major Insect Pests of Cabbage, Brassica oleracea var. capitata Linn.
dc.these.typeM.Sc
dc.titleEco-friendly Management of Major Insect Pests of Cabbage, Brassica oleracea var. capitata Linn.
dc.typeThesis
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