NONTARGET EFFECT OF SPRAYS TO CONTROL CALIFORNIA RED SCALE (AONIDIELLA-AURANTII [MASKELL], HOM, DIASPIDIDAE) ON CITRUS RED MITE (PANONYCHUS-CITRI [MCGREGOR], ACARI, TETRANYCHIDAE)

Five insecticides used to control California red scale, Aonidiella aur antii (Maskell), were evaluated in the held for their effect on Califo rnia red scale and the non-target pest, citrus red mite (Panonychus ci tri [McGregor]). Carbaryl, methidathion, parathion and chlorpyrifos we re very effective against California red scale. NR 415 petroleum spray oil was less effective against California red scale than the organoph osphates and carbamate. Carbaryl, methidathion and parathion caused an increase in citrus red mite population in both years of study. Chlorp yrifos caused an increase in citrus red mite population in one out of two years but did not result in as high an increase of citrus red mite numbers as did methidathion, parathion and carbaryl. Citrus red mite densities in the NR 415 petroleum oil treatments were as low or lower than in the untreated controls.