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Title: Orius tantillus against Scirtothrips dorsalis on capsicum under polyhouse conditions in India
Authors: A, Krishnamoorthy
P N, Gangavishalakshi
K, Gopalakrishna Pillai
Keywords: Capsicum
Issue Date: 2009
Citation: Krishnamoorthy, A., Ganga Visalakshi, P. N. and Gopalakrishna Pillai, K. 2009. Orius tantillus against Scirtothrips dorsalis on capsicum under polyhouse conditions in India. Proceedings of III International symposium on Biological Control of Arthropods , Lyncoln University, Chrystchurch, New Zealand, Feb 8-13.
Abstract: The possibility to use native predator Orius tantillus (Motschulsky) (Hemiptera: Anthocoridae) for control of natural infestation of Scirtothrips dorsalis Hood (Thysanoptera: Thripidae) on capsicum (Capsicum annuum L.) grown under polyhouse conditions was tested. Three trials were conducted during 2007 – 2008 on Capsicum F1 hybrid Indira. Two different methods like 1) Release of predator on a Unit area basis and 2) Release of known number plant-1 basis such as 2, 3, 5, and 10 plant-1. Augmentative release of predator was commenced at weekly intervals from the first appearance of thrips. Thrips sampling was done both by counting and visual rating on 0 - 5 scale. A total of 10 plants at random were selected treatment-1 week-1 for counting thrips and predators. In all the trials, thrips density and damage were significantly lower in the predator release treatments as compared to untreated control. About 50% immediate reduction in thrips density was observed in all the trials within a week after release of 1 predator plant-1. Thrips damage was more severe in second trial, which resulted in complete death of plants in the untreated control. Overall 79.41%, 81.48% and 90.90% reduction and 100% increase in thrips density was observed in 2, 3 and 5 predator plant-1 release and untreated control, respectively in third trial in 8 weeks. The result thus indicates that thrips can be controlled effectively under polyhouse conditions on capsicum with the releases of the predator O. tantillus at the rate of 2 plant-1.
URI: http://hdl.handle.net/123456789/208
Appears in Collections:Entomology & Nematology

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