Combination studies of selected acaricides with zineb, mancozeb, or carbamate for mite control on citrus

Field experiments were conducted between 1981 and 1988 to evaluate the potential of zineb (zinc ethylene bisdithiocarbamate), mancozeb (a coordination product of zinc ion and manganese ethylene bisdithiocarbamate) and carbamate (ferric dimethyldithiocarbamate) in combination with one or more of the following acaricides: ethion, chlorpyrifos, dicofol, chlorobenzilate, propargite or formetanate for the control of the citrus rust mite, Phyllocoptruta oleivora (Ashmead) (Acari:Eriophyidae). Treatments were applied to replicated single tree plots using a handgun from a truck-mounted sprayer or to replicated nine tree plots using an airblast sprayer during the postbloom, summer or supplemental fall spray periods. Mancozeb alone was slightly better than zineb alone in the suppression of P. oleivora. However, neither compound demonstrated sufficient activity to justify its use alone as an acaricide on citrus. The combinations of ethion, chlorpyrifos, dicofol or propargite with either mancozeb or zineb sh...