PEST COMPLEX OF BHUT JOLOKIA AND THEIR MANAGEMENT

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dc.contributor.advisorBorah, R.K.
dc.contributor.authorThangjam, Rojeet
dc.date.accessioned2019-06-08T06:47:57Z
dc.date.available2019-06-08T06:47:57Z
dc.date.issued2017-07
dc.description.abstractField and laboratory experiment on pest complex and their natural enemies, identification and detection of insect vectors, integrated management of important pest of Bhut Jolokia and cost benefit ratio of different treatment modules were carried out during rabi (2014-15 and 2015-16) at Horticultural Orchard, Department of Entomology and Department of Plant Pathology, Assam Agricultural University, Jorhat (Assam). Altogether 110 species of arthropods were found to be associated with Bhut Jolokia at Jorhat, out of which 19 species were identified as pest, 64 as natural enemies and 27 species as casual visitors. Among the different insect pests recorded, 6 species were identified as “major” and they were Aphis gossypii (Glover), Myzus persicae (Sulzer), Bemisia tabaci (Gennadius), Bactrocera latifrons (Hendel), Scirtothrips dorsalis (Hood) and Polyphagotarsonemus latus (Banks). Among the natural enemies recorded, 44 species of predators, 13 species of parasitoids and one species of entomopathogenic fungus belongings to different orders have been reporting for the first time adding the number of natural enemies in Bhut Jolokia ecosystem. Moreover, among the dipteran predators, Syrphid fly (Lathyrophthalmus arvorum) has been reporting for the first time from Assam. All the genotypes of Bhut Jolokia collected from Assam, Manipur and Nagaland showed susceptible to viral diseases. However, the lowest incidence was observed in KCM2 (33.33%) and KCN1 (33.33%). Among the insect pests, 3 species viz., B. tabaci, A. gossypii and M. persicae have also been identified as a vector of Chilli Leaf Curl Virus (ChLCV), Cucumber Mosaic Virus (CMV) and Potato Virus Y (PVY), respectively during the investigation and they were confirmed through DAS-ELISA and PCR technique. Among the different treatment modules, module M2 that includes seedling root dip treatment with imidacloprid 17.8 SL @ 40g a.i./ha for 30 minute just before transplanting + growing of border crop (okra) + spraying of imidacloprid 17.8 SL @ 40g a.i./ha at 20 days after transplanting at 15 days interval (4 sprays) was found to the best performer in suppressing the population of aphid and whitefly followed by module M4 that includes seedling root dip treatment with imidacloprid 17.8 SL @ 40g a.i./ha for 30 minute just before transplanting + growing of border crop (maize) + spraying of lambda cyhalothrin 5 EC @ 25g a.i./ha starting from 20 days after transplanting (4 sprays) which were significantly superior over untreated control module M6. All the treatment modules had also significantly reduced the viral disease incidence as compared to untreated control. But the module M2 was the most effective in reducing the viral disease incidence followed by module M4 in both the seasons. However, these two modules greatly affect the population of coccinellids and spiders. The insecticidal treatment modules had significant effect in reducing the insect pest population and also the incidence of viral diseases thereby increasing the yield of Bhut Jolokia during the investigation. The highest yield was obtained in module M2 (3564.44kg/ha) followed by M4, M1, M3 and M5 (2687.94, 2303.98, 2100.15 and 1511.41kg/ha, respectively). The results on cost benefit ratio revealed that the highest was recorded in module M2 (1: 4.85) followed by M4 (1: 3.37) and M1 (1: 2.13).en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810107791
dc.keywordsPEST COMPLEX, BHUT JOLOKIAen_US
dc.language.isoenen_US
dc.publisherAAU, Jorhaten_US
dc.subEntomologyen_US
dc.subjectnullen_US
dc.themePEST COMPLEX OF BHUT JOLOKIA AND THEIR MANAGEMENTen_US
dc.these.typePh.Den_US
dc.titlePEST COMPLEX OF BHUT JOLOKIA AND THEIR MANAGEMENTen_US
dc.typeThesisen_US
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