Field screening of different genotypes of chilli against infestation of thrips Singh N.K.1,*, Pandey Anand2 1J.N.K.V.V., Krishi Vigyan Kendra, Seoni (M.P.); KVK Seoni, (M.P.) 2Project Coordinating Unit Sesame and Niger, J.N.K.V.V., Jabalpur (M.P.) *E-mail: nikhilsingh478@gmail.com
Abstract In order to explore the possibility of sources of resistance and relative tolerance of the cultivars a total of 69 germplasm consisting of diverse phenotypic and genetic makeup were evaluated against thrips damages on the basis of symptoms occurring on the leaves during two consecutive seasons under open field conditions at the Indian Institute of Vegetable Research, Varanasi. The tolerance index was calculated by taking into consideration the injury grade (IG) showed that none of the genotype were found free from the infestation. The average of two years data showed that the genotype LCA 436 (4.51 LCI) had highest leaf damage followed by 9852-173 PT-3 (4.37 LCI) while lowest leaf curl (0.43 LCI) was found in the genotype Taiwan-2 followed by PDG-1 A (0.60 LCI) and DC-28 (0.79 LCI). The genotypes based on leaf curl index, grouped in to different categories showed that none of the screened genotypes were found resistant. Only three genotypes i.e. PDG-1 A, Taiwan-2, DC-28 were found moderately resistant. The slightly resistant category (1.01–2.0 LCI) included 10 genotypes. Twenty two genotypes were found moderately susceptible and twenty six as susceptible. Six genotypes JCA-9, KADDI, AC-ASSAM-9-UP, 9852-173 PT-3, LCA 436, BS-80 with 4.01–5.0 leaf curl index were categorized as highly susceptible genotypes. Top Keywords capsicum annum, chilli, screening, thrips, mite. Top |