The maximum (31.40% and 30.40%) fruit fly infestation on number and weight basis respectively was also recorded in 41stSMW. The fruit fly infestation started decreasing after 44thSMW due to maturity of crop. The correlation studies of fruit flies/trap/week, fruit fly infestation on number and weight basis was found non-significant with maximum and minimum temperatures, morning and evening relative humidity, wind velocity and rainfall.

The incidence of fruit fly was significantly less in various spray baits used in comparison with untreated control. The mean observation taken 10 days after spraying clearly indicate that the spray bait prepared from molasses, tulsi leaf extract, jaggery, sugar, NSE, protein hydrolysate and cucumber pulp were found promising in reducing the infestation of cucumber fruit fly B. cucurbitae.

The cucumber yield ranged from 11.10 to 12.60 tonn/ha. Sugar spray bait treatment recorded highest (12.60 tona/ha) followed by tulasi leaf extract (12.15 tona/ha) and molasses (12.03 tona/ha). The highest (1:11.81) ICBR was recorded in the spray bait treatment prepared from molasses and followed by sugar (1:11.54).