Screening of ridge gourd genotypes aganist melon fruit fly, Bactrocera cucurbitae (Coquillett) under field conditions

Abstract

Using resistant varieties is one of the effective components in the management of melon fruit fly on ridge gourd due to difficulties associated with its chemical and biological control methods. Twenty ridge gourd genotypes were screened against melon fruit fly under field conditions at University of Horticultural Sciences, Bagalkot, (Karnataka, India). Among the different genotypes screened, the eleven genotypes such as UHSBRG-5, UHSBRG-15, UHSBRG-12, UHSBRG-18, UHSBRG-19, UHSBRG-17, UHSBRG-9, UHSBRG-1, UHSBRG-6, UHSBRG-16 and UHSBRG-13 were classified under resistant category. Whereas, the genotypes such as UHSBRG-3, UHSBRG-4, UHSBRG-2, UHSBRG-14, UHSBRG-8, UHSBRG-20 and UHSBRG-7 were categorized as moderately resistant genotypes and UHSBRG-11 and UHSBRG-10 were classified as susceptible genotypes. Resistant genotypes found in the present study could be further used in breeding programme as sources for developing resistant ridge gourd varieties.