【摘要】 <正> 米老排(Mytilaria laosensis)为广西地区颇受群众欢迎的乡土树种,60年代试种以来表现出优良、速生的造林特性,目前已发展至两万亩左右。70—80年代初期,广西大青山地区营造的米老排幼林瘿螨危害严重,面积达1500亩,占造林面积的80％,发病株率高达100％,病叶率达50—67.7％,感病指数达77。弓明钦(1981)曾首次以“球毡病”的名称作了报道,以后的其它调查也表明,广西中部、西部甚至北部某些地区也有发生,个别地方同样十分严重。更多还原

【Abstract】 Mytilaria laosensis in Daqingshan area of Guangxi is severely invaded by Gall Mite (Eriophyes sp.). The primary infection occurs during March-April, peak infection during August-October, and then it declines. The Mite overwinters mainly on diseased spots or on petioles. Leaf inoculation under an average temperature of 29℃ and a relative humidity of 85% indicates that the incubation period is about 4-5 days and infection percentage reaches 46.6-53.3%. Indoor tests of insecticidal chemicals show that 20% Dicofol, DDVP (1: 1000-1500), etc. are effective. So are some insecticidal smokes.更多还原