Home About Us Search Newsletters Weather / Climate Viticulture Pest management Scouting guide Publications Calendar of events Industry links Contacts Download Adobe Acrobat Reader to view pdf files.	Twospotted spider mite Rufus Isaacs, MSU Entomology Home > Scouting guide> twospotted spider mite This mite can cause severe damage to wine grapes if populations reach high densities. The mite’s feeding removes leaf tissue, causing yellowing and then bronzing. Thin-leaved varieties are most susceptible. These mites overwinter in leaf litter, develop on weeds in spring and move onto the vine as ground cover dries in summer. Water-stressed vines are most at risk. The most effective method of con-trol is to protect predatory mites. Biological control is achieved with one predatory mite per 10 twospotted mites. Bronzing on the upper side of the leaf is a symptom of mites feeding below. Twospotted spider mites can be seen with a 20X hand lens.
Additional information Recommendations from the Michigan Fruit Management Guide
Site map           Copyright/Linking
Funding for this web site provided by Project GREEEN, American Farmland Trust, EPA Region 5's Strategic Agricultural Initiative program, The National Foundation for IPM Education, the Center for Agricultural Partnerships and the MSU Integrated Pest Management Program in collaboration with MSU Extension and the Michigan Agricultural Experiment Station. Partially support from NC-IPM Center. 05/26/11 Contact: E. Haney