殺蟎劑對檬果上檬果葉蟎與荔枝葉蟎（真蟎目：葉蟎科）之藥效試驗

＂Oligonychus mangiferus＂ and ＂O. litchii＂ are two major spider mites species of mango in Taiwan. We conducted a study on the control efficiency of miticides on these two spider mite species in the Yujing District, Nanhua District, Tainan city, and Fanshan Township, Pingtung County. Five miticides, i.e. bromopropylate, fenpropathrin, fenpyroximate, spirodiclofen, and tebufenpyrad were used to study the toxicity during the egg, immature, male, and female stages of these mites. The most effective miticide for ＂O. mangiferus＂ was Tebufenpyrad, causing 100% mortality in all stages. Bromopropylate, fenpyroximate, and spirodiclofen were the second best with a mortality rate above 95%, while fenpropathrin was not effective for ＂O. mangiferus＂ at a 14.5% mortality rate. Spirodiclofen had no effect on adults and had a mortality rate of less than 10% for ＂O. mangiferus＂. Fenpyroximate had the best control results for ＂O. litchii＂ with a mortality rate of 92.5%, while fenpropathrin had the lowest mortality rate at only 49.2%. All five miticides had a similar control efficiency for these two spider mites regardless of the stage or their location. It should be noted however that ＂O. litchi＂ had a slightly higher tolerance to these miticides compared to ＂O. mangiferus＂.