Evaluation of field pea varieties against mildews (Downy and Powdery) under natural conditions

Abstract

In India a very narrow genotype based is involved in existing pea varieties and the resistant varieties for mildews could not be expected to be permanently resistant. Numbers of genotypes are still identified to possess desirable degree of resistance in pea. Studies were planned to search out the genotypes against mildews through sick plot technique. Out of 49 genotypes, 5 viz., genotypes FP-16-21,FP-16-27,FP-16-11,FP-16-39,FP-16-38 were found moderately resistant and 5 viz., FP-16- genotypes 19,FP-16-22,FP-16-40, FP-16-16,FP-16-45. Whereas tolerant. Twenty nine genotypes namely (FP-16-30,FP-16-4,FP-1634,FP-16-54,FP-16-9,FP-16-13,FP-16-1,FP-16-41,FP-16-8,FP-1649,FP-16-3,FP-16-6,FP-16-10,FP-16-25,FP-16-44,FP-16-32,FP-16-5,FP-16-17,FP-16-7,FP-16-36,FP-16-43,FP-16-29,FP-16 35, FP-16-24,FP-16-33,FP-16-23,FP-16-46,FP-16-18,rachna.) were found moderately susceptible only rest ten genotypes (FP-16-48, FP-16-42, FP-16-31, FP-16-2, FP-16-15, FP-16-47, FP-16-51, FP-16-37, FP-16-14,FP-16-20) as highly susceptible. The same set of 49 germplasms was screened against powdery mildew under natural conditions. Out of 49 germplasms, none was found highly resistant (Immune). However twenty two germplasms viz., FP-16-42,FP-16-27,FP-16-11,FP-1631,FP-16-2,FP-16-15,FP-16-39,FP-16-34,FP-16-54,FP-16-22,FP-16-9,FP-16-51,FP-16-37,FP-16-14,FP-16-8,FP-16 16, FP-16-6,FP-16-20,FP-16-29,FO-16-32,FP-16-5,FP-16-18.were found resistant and seven germplasms viz. FP-16-48,FP-16-30,FP-16-4,FP-16-47,FP-16-10,FP-16-7 and Rachna moderately resistant. Nineteen genotypes namely (FP-16-21,FP-16-19,FP-16-13,FP-16-38,FP-16-1,FP-16-36,FP-16-40,FP-16-41,FP-16-43,FP-16-49,FP-16-3,FP-16-45,FP-16 25, FP-16-44,FP-16-35,FP-16-24,FP-16-17,FP-16-23,FP-16-46) were found moderately susceptible and rest one germplasms (FP-16-33) as susceptible. None was found highly susceptible.