to that attributed to the European red mite but differs in that there is much
silken webbing where populations are high.Two-spotted Spider Mite, Tetranychus urticae Koch (Acari: Tetranychidae)
In many respects, the two-spotted spider mite is similar to
the European red mite. The injury it causes to grapes is similar
to that attributed to the European red mite but differs in that there is much
silken webbing where populations are high.
T
he
adult female is less than 1/50 inch in length and varies in its coloration,
individuals being shades of green, yellow or red. Two darker, dorsal pigmented
spots give this mite its common name. Male mites are more active and smaller,
and have a more narrow,. pointed abdomen than females. Tiny eggs, clear to pale
green and spherical! are laid on the undersides of leaves, where feeding and
web spinning occurs.
Hot, dry weather conditions favor the development and proliferation of spider mites; on the other hand, low temperature, high humidity and moist situations are deleterious to survival. The two-spotted spider mite overwinters as orange females under grape bark. There are many overlapping generations every year.
Current pesticide recommendations may be found Here