BIO-ECOLOGY AND MANAGEMENT OF MIRID BUG, Poppiocapsidea (= Creontiades) biseratense (DISTANT) (HEMIPTERA : MIRIDAE) ON Bt COTTON

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dc.contributor.advisorM. BHEEMANNA
dc.contributor.authorPRAKASH
dc.date.accessioned2017-06-23T12:04:13Z
dc.date.available2017-06-23T12:04:13Z
dc.date.issued2012-06-30
dc.description.abstractStudies undertaken at College of Agriculture and Main Agricultural Research Station, Raichur during 2011-12 on Bio-Ecology and management of mirid bug, Poppiocapsidea (=Creontiades) biseratense (Distant) on Bt cotton indicated that, the female bug inserted the eggs singly or in groups on the petiole, bracts and flower petals. The freshly laid eggs were nacreous white in colour and cigar shaped. Hook shaped egg cap was formed at the anterior end which aided in hatching. The bug had five nymphal instars with a mean nymphal duration of 12.60 days. The total life cycle of male and female was 32.70 and 40.40 days with a mean fecundity of 126.10 eggs per female. Both nymphs and adults were found to suck the sap by piercing their sharp stylet into the plant tissues, squares and small tender bolls. Favoured plant parts for feeding are the squares of all sizes, young leaves and small bolls. Affected parts gradually turned yellow, sunken and dropped down prematurely and symptoms like square staining, feeding punctures at the base of square and on small bolls were found. The incidence of mirid bug was noticed from September and gradually increased in the month of November and December. Peak incidence of mirid bug was noticed in the month of November and December. In general the incidence of mirid bug was low in the crop sown in July and more in the crop sown in August. However in all different date sown crop the incidence of mirid bug was coincides with the maximum fruiting bodies of the crop. Thirteen Bt and a non Bt cotton hybrids were screened under field condition for their reaction to mirid bug damage. Based on the overall performance of the hybrids, Brahma, RCH 530 and VICH 303 appeared to be less prone to mirid bug attack. Mirid bug incidence was found to be high on genotypes which have more trichome density, and hence the hairy varieties like NCS-145, MRC-7351 and Tulsi-144 might be more prone to mirid attack compared to glabrous varieties like Brahma, VICH-303 and RCH-530. Among the different insecticides and botanicals evaluated for their efficacy against P. biseratense, fipronil 5 SC+1 per cent salt at 50 g a.i. /ha, acephate 75 SP +1 per cent salt at 750 g a.i. /ha, and profenophos 50 EC +1 per cent salt at 1000 g a.i. /ha, were found to be superior over other chemicals in reducing the mirid bug populationen_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810023083
dc.language.isoenen_US
dc.subAgricultural Entomologyen_US
dc.subjectnullen_US
dc.themeBIO-ECOLOGY AND MANAGEMENT OF MIRID BUG, Poppiocapsidea (= Creontiades) biseratense (DISTANT) (HEMIPTERA : MIRIDAE) ON Bt COTTONen_US
dc.these.typeM.Scen_US
dc.titleBIO-ECOLOGY AND MANAGEMENT OF MIRID BUG, Poppiocapsidea (= Creontiades) biseratense (DISTANT) (HEMIPTERA : MIRIDAE) ON Bt COTTONen_US
dc.typeThesisen_US
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