Sulfur can suppress mite predators in vineyards
California Agriculture 51(1):19-21. DOI: 10.3733/ca.v051n01p19.
The Pacific spider mite and the Willamette spider mite are the most common mite pests on grapevines. A single-season study of a vineyard near Madera showed that regular sulfur applications for powdery mildew control can exacerbate spider mite problems in vineyards by suppressing populations of predatory thrips and predatory mites.
R. Hanna is Postdoctoral Researcher, Department of Entomology, UC Davis; F.G. Zalom is Extension Entomologist, Department of Entomology, UC Davis; L.T. Wilson is former Professor of Entomology, UC Davis (currently Professor of Entomology, Texas A&M University); G.M. Leavitt is Viticulture Farm Advisor, UC Cooperative Extension, Madera County.