Abstract
A series of observations were recorded on natural enemies and their role in suppression of tea mosquito bug (TMB) Helopeltis antonii Signoret in the cashew plantations of Zonal Agricultural Research Station, Brahmavar and Pethri village, Udupi district and in maidan (plains) tracts of Chintamani, Karnataka during 2006–2008. The ant, Oecophylla smaragdina Fabricius was the most effective predator against TMB. Cashew trees fully colonized by O. smaragdina received the least TMB damage of 11.40 + 1.87 and 8.71 + 1.23 % during 2006–2008 in coastal and maidan Karnataka, respectively. TMB damage colonized with O. smaragdina was 23.40 + 2.16 in coastal and 20.12 + 2.05 in maidan habitat. The unsprayed cashew trees with no ant recorded maximum damage of 47.42 + 3.71 and 52.36 + 3.86 % in coastal and maidan tracts, respectively. Higher nut yield of 3.70 kg/tree in coastal and 2.43 kg/tree in maidan tract was recorded from the trees fully colonized with O. smaragdina. The yellow crazy ant (Anoplolepis gracilipes F Smith) was a deterring factor for the spread, establishment and effectiveness as a predator on colonies of O. smaragdina in cashew plantations in Karnataka. Telenomus species was the predominant egg parasitoid on TMB. Maximum egg parasitisation of 16.80, 15.35 and 12.70 % was recorded on TMB eggs in Brahmavar, Pethri and Chintamani cashew plantations, respectively, in December, 2006–2008. The sequential sprays of monocrotophos (0.05 %)—λ cyhalothrin (0.005 %)—carbaryl (0.10 %) registered the least percentage TMB damage, higher nut yield and higher C to B ratio.
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Naik, C., Chakravarthy, A., Timmanna, Thyagaraj, N. (2015). Sustainable Management of Tea Mosquito Bug Helopeltis antonii Signoret (Miridae: Hemiptera) on Cashew. In: Chakravarthy, A. (eds) New Horizons in Insect Science: Towards Sustainable Pest Management. Springer, New Delhi. https://doi.org/10.1007/978-81-322-2089-3_34
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DOI: https://doi.org/10.1007/978-81-322-2089-3_34
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