林明瑩、陳昇寬。2008。檬果葉蟎之發生及其田間防治試驗。臺南區農業改良場研究彙報 51: 1-8。
Occurrence of Mango Red Spider Mite, Oligonychus mangiferus, and its Control in the Field
Lin, M. Y. and S. K., Chen
Mango red spider mite, Oligonychus mangiferus, is the pest on leaves of mango. It is wild istributed in Jhungpu, Fanlu, Yijhu of Chiayi county, and Nansi, Yujing, Nanhua, Zoujhen, Sinhua and Guantian of Tainan county. The population is much higher and damage seriously especially in the major mango produce area, Nanhua, and Yujing. There was two peak of the population of mites during the year, from February to June, and October to December. We conduct the control study in the field, there were 4 treatments include 25% Bromopropylate EC 1000 times, 10% Chlorfenapyr SC 2000 times, 5% Fenpyroximate SC 2000 times and Check. Spray twice 7 days interval, and sampling the leaves on the mango tree to count the number of mites each spraying day before pray and 7, 14, 21, 28 days after respectively. After first apply the number of mites of each treatments, Bromopropylate, Chlorfenapyr, Fenpyroximate and Check, were 45.1, 511.8, 32.1, 644.5 / 20 leaves of each treatments respectively. The control rates of Bromopropylate, Chlorfenapyr, and Fenpyroximate were 87.8, 0 and 94.5%, respectively. The densities of mites dropped obviously on 7 days and 14 days after second spray, and the control rates of Bromopropylate and Fenpyroximate were above 98%. Otherwise, Chlorfenapyr could not effective to the mango red mite, the densities that still higher than check obviously. On the last survey of the study among those treatments beside Chlorfenapyr, the densities of mites on treatments of Bromopropylate and Fenpyroximate were significantly lower than check, the control rates were 76.6 and 98.1% respectively.
Key words: Mango red spider mite, Oligonychus
mangiferus, control, Bromopropylate, Chlorfenapyr, Fenpyroximate
Accepted for publication: 14 April, 2008