Cross breeding between the two spider mites, Tetranychus urticae Koch and Tetranychus cucurbitacearum (Sayed) in Egypt

Abstract: The green two-spotted spider mite Tetranychus urticae Koch and the red mite T. cucurbitacerum (Sayed) were subjected to a study to shed light on their identity, based on their reproductive compatibility. Cross breeding produced fertile and normal hybrids for the F1 and F2 in relation to egg laying capacity and to the sex ratio of the offspring. Inheritance of female offspring color was maternal for the green form mite.