Sensitivity infestation by Cucurbita fly: Dacus ciliatus Loew (Diptera: Tephritidae) on three different species cucurbits and their control

Experiments were conducted in the experimental Farm of Plant Protection Research Institute, Qaha, Qalubiya governorate under field conditions during two successive seasons (2020 and 2021). The aim of this study Sensitivity infestation by Cucurbita fly: Dacus ciliatus Loew (Diptera: Tephritidae) on three different species cucurbits and their control. The results showed that the population fluctuation of the D. ciliatus infesting on three different species cucurbitae (cucumber, zucchini, and snake melon) fruits highly significant differences Whereas F value = F value in first season = 10.15 ** and L.S.D. = 21.11 individuals/240 fruits, could be divided three groups in first season but in the second season could be divided two groups whereas F value in second season = 14.66 *** L.S.D. = 29.24 individuals/240 fruits. The data indicated that the most affected by infestation species was zucchini showed that high abundant of population fluctuation in 12 nd of May in both seasons. In respect to, Zucchini was susceptible 72.21 (larvae stages) / 240 fruits in the first season but in the second season was highly susceptible with 98.63 (larvae stages) / 240 fruits, respectively. The mean susceptibility degree of the two tested seasons showed highly susceptible with 85.42 (larvae stages) / 240 fruits. Zucchini was showed that, D. ciliatus recorded the highest growth rate (4.24), taking time difference 21 days between initial D. ciliatus number 21 and maximum count 110(larvae stages) / 40 fruits in the first season. Data of the second season was showed the D. ciliatus recorded the highest growth rate 6.76 taking 21 day between the initial pest number No (12 (larvae stages) / 40 fruits and maximum count Nt (154 (larvae stages) / 40 fruits. Data showed when using different treatments Penny 9% (Emamectin benzoate 1.5%+Indoxacarb 7.5%), Sinodor WG70% (Imidacloprid 70%) and Betavant SC14.5% (Indoxacarb 14.5%) have a highly significant effect on decreasing D. ciliatus population infesting zucchini growth. The plant extract and nanoparticles treatments have effect on D. ciliatus population whereas decreased mean number of pests the most efficiency method compared to control (without treatment).