author(s)
Mahesh Math, Kotikal YK and Venkateshalu

abstract
Studies were made to standardize methyl eugenol concentration and trap design for Bactrocera dorsalis Hendel on custard apple during 2015-16 at University of Horticultural Sciences (UHS), Bagalkot. Among the different concentrations of methyl eugenol, 2 percent was significantly superior in attracting highest number of B. dorsalis (5.00 fruit flies/trap/day) compared to its higher dose i.e., 5 percent (4.00 fruit flies/trap/day) and its lower doses. With respect trap design, bottle trap with bottom hole charged with 2 percent methyl eugenol was found superior by attracting highest number of fruit flies (9.66 flies/trap/day) compared to trap with top hole charged with 2 and 5 percent methyl eugenol (0.00 and 1.20 flies/trap/day, respectively). Among the different coloured trap charged with 2 percent methyl eugenol transparent bottle captured significantly highest number of B. dorsalis (5.44 fruit flies/trap/day) as compared to yellow, green, blue and white coloured traps (1.44, 0.44, 0.44, 0.44 and 0.22 flies/trap/day, respectively).