STUDIES ON PREDATORY FAUNA OF COTTON APHID, Aphis gossypii GLOVER (HEMIPTERA: APHIDIDAE) IN CUCUMBER

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dc.contributor.advisorVERMA, S C
dc.contributor.authorKUMARI, DEEKSHA
dc.date.accessioned2019-01-04T10:33:05Z
dc.date.available2019-01-04T10:33:05Z
dc.date.issued2018-10
dc.description.abstractABSTRACT The present investigations entitled “Studies on Predatory Fauna of Cotton Aphid, Aphis gossypii Glover (Hemiptera: Aphididae) in,r” were conducted during the year 2017 at Y.S Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh. During the course of study, 11 species of predators viz. Coccinella septempunctata Linnaeus, Hippodamia variegata (Goeze), Harmonia dimidiata (Fabricius), Oenopia kirbyi Mulsant, Oenopia sauzetii Mulsant, Oenopia sexareata (Mulsant), Scymnus nubilus (Mulsant), Cheilomenes sexmaculata (Fabricius), Chrysoperla zastrowi sillemi (Esben-Peterson), Mallada sp. and Episyrphus balteatus (DeGeer) were found associated with A. gossypii. Among different predators, C. septempunctata was the most abundant contributing 38.12 per cent of the total predator community The average incubation, larval, pre pupal and pupal period of C. septempunctata was 3.2, 13.34, 1.90 and 3.90 days, respectively. The female and male longevity of C. septempunctata was 43.84 and 35.80 days, respectively, whereas, mean fecundity was 189.60 eggs/ female. Incubation, total larval, pre pupal and pupal period of O. kirbyi was 3.40, 15.26, 1.30 and 4.80 days, respectively. Female and male longevity of adult beetles of O. kirbyi was 38.50 and 31.38 days, respectively, whereas, female laid 177.60 eggs/ female. Average incubation, larval, pre pupal and pupal period of C. zastrowi sillemi was 2.60, 11.62, 1.10 and 8.30 days, respectively. Male longevity was 26.80 days, whereas, female laid on an average of 398.90 eggs/ female in their life span of 37.60 days. Incubation, larval, pre pupal and pupal period of Mallada sp. was 2.90, 12.68, 1.40 and 9.10 days, respectively. Female and male longevity of Mallada sp. was 46.28 and 27.36 days, respectively, whereas, the female laid on an average 128.58 eggs/ females. Total larval consumption of C. septempunctata, O. kirbyi, C. zastrowi sillemi and Mallada sp. was 579.92, 535.90, 431.06 and 398.50 aphids, respectively. Adult females of C. septempunctata and O. kirbyi consumed 3376.94 and 2634.78 aphids, whereas, adult males of C. septempunctata and O. kirbyi consumed 2457.84 and 2012.52 aphids, respectively. All the predatory species i.e. C. septempunctata, O. kirbyi, C. zastrowi sillemi and Mallada sp. showed a Type II functional response and the attack rate for all the predators increased and handling time decreased with the advancement in developmental stages. Hence, among coccinellids C. septempunctata is the most abundant predator and feeding potential was higher than O. kirbyi, whereas, among chrysopids C. zastrowi sillemi was most abundant and feeding potential was higher than Mallada sp. Thus, C. septempunctata and C. zastrowi sillemi can be utilized as a component of integrated pest management programme for the men_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810088952
dc.keywordsStudies on Predatory Fauna,Cotton Aphid, Aphis gossypii Glover, Cucumbeen_US
dc.language.isoenen_US
dc.pages65+iven_US
dc.publisherUHF, NAUNIen_US
dc.subEntomologyen_US
dc.subjectnullen_US
dc.themeStudies on Predatory Fauna,Cotton Aphid, Aphis gossypii Glover, Cucumbeen_US
dc.these.typeM.Scen_US
dc.titleSTUDIES ON PREDATORY FAUNA OF COTTON APHID, Aphis gossypii GLOVER (HEMIPTERA: APHIDIDAE) IN CUCUMBERen_US
dc.typeThesisen_US
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