Field evaluation of selected botanicals and commercial synthetic insecticides against Thrips tabaci Lindeman (Thysanoptera: Thripidae) populations and predators in onion field plots |
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| Institution: | 1. Department of Agricultural Entomology, University of Sargodha, Sargodha, Pakistan;2. Fodder Research Institute, Agriculture Department (Research Wing), Sargodha, Pakistan;3. Department of Biological Sciences, University of Sargodha, Sargodha, Pakistan;4. Department of Biotechnology, University of Sargodha, Sargodha, Pakistan;1. Centro de Estudios Parasitológicos y de Vectores, (CEPAVE) CONICET-UNLP- Asociado CICBA, Boulevard 120 e/ 60 y 64, 1900, La Plata, Argentina;2. Departamento de Ciencias Exactas y Naturales, Universidad Nacional de San Antonio de Areco- UNSAdA, San Antonio de Areco, Argentina;1. University of Georgia, Department of Entomology, 2360 Rainwater Rd, Tifton, GA 31793, USA;2. University of Georgia, Department of Plant Pathology, 2360 Rainwater Rd, Tifton, GA 31793, USA;1. São Paulo State University – UNESP, Institute of Science and Technology, Sorocaba, SP, Brazil;2. Department of Biochemistry, State University of Campinas, Campinas, SP, Brazil;3. Institute of Environment & Sustainable Development, Banaras Hindu University, Varanasi 221005, India |
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| Abstract: | The effectiveness of three botanical insecticides (neem, datura and bitter apple), and three new chemistry synthetic insecticides (acephate, spirotetramat and spinetoram) against onion thrips (Thrips tabaci) was evaluated in experimental field plots at university of Sargodha, Pakistan. The influence of these botanical and chemical insecticides on natural predators and crop yield was simultaneously investigated. All the botanicals and chemical insecticides tested caused significant reductions (45–70%) in thrips populations; the botanicals gave more than 60% control of thrips, while among chemical insecticides, acephate was found to be the most effective followed by spirotetramat and spinetoram, respectively, and these insecticides gave better control than the botanicals. The adverse effects of the botanicals on predator populations were negligible compared to the chemical insecticides. All chemical treatments resulted in a significantly higher yield compared to the untreated control. The botanicals and chemical insecticides became less effective by 7 days after treatment. Therefore, it is recommended that treatment with botanical or chemical insecticides should be repeated weekly consecutively at least three times to keep thrips populations below economic injury levels until crop maturity. |
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| Keywords: | Chemical insecticides Biopesticides Eco-friendly IPM onion thrips |
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