Determination of crop loss and economic injury levels against tephritid fruit flies (Bactrocera sps) in cucumber ecosystem

The results on yield loss (pooled data) revealed that the per cent fruit infestation of fruit fly was highest in untreated control plot (30.73%) as compared to treated plot (26.8%) with fruit yield of 1223.91 kg/ha and 2311.83 kg/ha, respectively. The yield loss in untreated plot was recorded as 1087.91 kg/ha with 47.05% avoidable loss in yield. Whereas, maximum per cent yield increase over control in 2-year study was 88.88%. However, economic injury level (EIL) of fruit fly workout on cucumber was 15.27 and 10.40% with per cent fruit loss of 0.743 and 0.815 during 1st and 2nd years, respectively.