Screening of the susceptibility of newly released genotypes of potato to thrips infestation under field conditions in northwest Iran |
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| Affiliation: | 1. University of KwaZulu-Natal, Department of Plant Pathology, Private Bag X01, Pietermaritzburg 3201, South Africa;2. Bindura University of Science Education, Department of Crop Science, Private Bag 1020, Bindura, Zimbabwe;1. Restoration Ecology Group, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow 226001, Uttar Pradesh, India;2. Division of Soil Science, CSIR-Central Institute of Medicinal and Aromatic Plants, Picnic Spot Road, Lucknow 226015, Uttar Pradesh, India;3. Rubber Board Regional Office, Housefed Complex, Dispur, Guwahati 781006, Assam, India;1. University of Florida, Tropical Research & Education Center, 18905 SW 280th Street, Homestead, FL 33031, USA;2. Earth University, San José, Costa Rica;3. Florida Department of Agriculture and Consumer Services, Hayslip Biocontrol Research Laboratory, Fort Pierce, FL 34945, USA;4. Florida Department of Agriculture and Consumer Services, Division of Plant Industry, Gainesville, FL 32611, USA;5. University of Florida, Mid-Florida Research and Education Center, Apopka, FL 32703, USA;1. Ministry of Health, Hanoi, Vietnam;2. Health Strategy and Policy Institute, Hanoi, Vietnam;3. Department of Quantitative Sciences, Baylor Scott & White Health, Dallas, TX, USA;4. Department of Population and Quantitative Health Sciences, University of Massachusetts Medical School, Worcester, MA, USA;6. Institute for Preventive Medicine and Public Health, Hanoi Medical University, Hanoi, Vietnam;5. Institute of Population Health and Development, Hanoi, Vietnam;1. Department of Ophthalmology, Koshigaya Hospital, Dokkyo Medical University, 2-1-50, Minamikoshigaya, Koshigaya, Saitama 343-8555, Japan;2. Lively Eye Clinic, 3-1-4, Asahicho, Soka 340-0053, Japan;1. Department of Plant Pathology, The University of Georgia, Coastal Plain Experiment Station, Tifton, GA 31793-5766, USA;2. Department of Entomology, The University of Georgia, Coastal Plain Experiment Station, Tifton, GA 31793-5766, USA;3. Agronomy Department, The University of Florida, North Florida Research and Education Center, Marianna, FL 32446, USA;4. Crop Genetics and Breeding Research Unit, USDA-ARS, Coastal Plain Experiment Station, Tifton, GA 31793, USA;5. Department of Crop and Soil Sciences, The University of Georgia, Coastal Plain Experiment Station, 31793 USA |
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| Abstract: | Use of host plant resistance is an essential component of integrated management of Thrips tabaci Lindeman. The present research was designed to screen five commercial cultivars of potato, namely Agria, Kondor, Morene, Diamant and Savalan, and two breeding lines 397082-2 and Khavaran for their susceptibility to thrips infestation and for their mean relative plant growth rate (MRGR) and crop yield in an experimental field (not frected with insecticides) and a control field (chlorpyrifos frected) in the Ardabil region of Iran in 2011 and 2012. Thrips populations were assessed by visual inspection on potato leaves. At harvest time, the percentage of leaf area damaged by thrips infestation was assessed on leaves of the tested genotypes. All adults of phytophagous thrips collected in the experimental field were T. tabaci. In both years the mean numbers of thrips adults and larvae were lowest on Savalan cultivar among the tested genotypes. The mean damage index was also lowest on Savalan in both years and the MRGR and the mean yield were greatest in Savalan in the control field. Moreover, in thrips-infested plants, the lowest percentage of MRGR loss and the lowest percentage of yield reduction were observed in Savalan (3.7% and 5.8%, respectively). Of the genotypes tested, Savalan is the most resistant host and has potential for use in the sustainable management of T. tabaci on potato. |
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| Keywords: | Damage index Population density Relative growth rate Thripidae |
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