Comparative biology and life table parameters of citrus brown mite Eutetranychus orientalis (Acari : Tetranychidae)‎ on different grapevine cultivars

الملخص EN

The influence of the three grapevine cultivars king rubi, crimson seedless and thompson seedless on biology and life table parameters of the citrus brown mite Eutetranychus orientalis (Klein) (Acari: Acariformes: Tetranychidae) was studied under laboratory conditions of 25 and 30±1°C and 70±5% R.H.

The biology of E.

orientalis consisted of egg, larvae, protonymph, deutonymph and adult stages.

The total duration of female from egg to adult was found to be the least in king rubi (16.4 and 8.3 days) followed by thompson seedless (10.02 and 9.53 days) and maximum in crimson seedless (19.18 and 10.18 days) at 25 and 30°C, respectively.

The highest fecundity was 35.4 and 29.8 eggs/ female on king rubi and the lowest fecundity was 26.6 and 23.4eggs/ female on crimson seedless at 25 and 30°C, respectively.

The higher values of net reproductive rate (R0), intrinsic rate of increase (rm), finite rate of increase (λ) the shortest mean generation time (T) was observed in king Rubi followed by thompson Seedless and crimson seedless.

The results suggested that king rubi was the most suitable variety with higher survival rate of mites, shortest development time and higher fecundity while crimson seedless was the least suitable variety because of the lowest survival rate, longest development period and lower fecundity.