Field screening of different bitter gourd genotypes against melon fruit fly, Bactrocera cucurbitae (Coquillett)

Field screening of different bitter gourd genotypes against melon fruit fly, Bactrocera cucurbitae were conducted at vegetable research farm, CCS HAU, Hisar, Haryana during 2017 and 2018. Promising bitter gourd genotypes namely, HK-127, HK-164, HK-168, BL-237, Jaun Puri, PB-14, Arka Bahar, Solan Hara, HK-157, Prithee and PDM were sown with row to row spacing of 1.5 m and plant to plant 45 cm in a randomized block design. Study of both the year shows that maximum infestation of fruit fly was observed in PDM variety. Highest percentage of marketable fruit (68.67) was recorded in HK 164 with minimum number of fruit fly infested fruits (31.33%) among all the tested genotypes. None of the genotypes were found resistance against fruit fly infestation.