Field Evaluation of Pyrimidifen for Controlling of The African Red Mite, <I>Eutetranychus africanus</I> (Tucker), on Tangerines in Chiang Mai

บทคัดย่อ

The field evaluations of pyrimidifen (Miteclean®) for controlling of the African red mite, Eutetranychus africanus (Tucker), on tangerine, Citrus reticulata cv. “Sai Nam Pueng”, compared with some selected acaricides were conducted at the tangerine orchard of Chiang Mai Thanathon, Co., Ltd. , Fang District, Chiang Mai Province. Pyrimidifen at the rates of 10 and 20 ml per 20 liters of water and abamectin at the rate of 20 ml per 20 liters of water were the most efficacious in controlling E. africanus and their persistency were 14-21 days while amitraz and propargite both at the rates of 30 ml per 20 liters of water exhibited the second level of efficacy and their persistency were shorten to 7 days.