论文部分内容阅读
山茶花红蜘蛛主要是红叶螨(Panonychus citri Margioni),一般大小约0.26～0.50×0.36～0.19毫米,梨圆形,体呈红褐色或锈红色。发生条件干旱少雨是红蜘蛛猖獗发生的主导因子。特别是1—3年生的山茶苗,因植株低矮受害最为明显。此外瘦弱的植株以及荫蔽程度低、小气候温度较高、湿度较低等,也有利于红蜘蛛的繁殖。危害在山茶叶背面以刺吸口器吸食汁液,被害叶片最初在正面出现黄白色小斑点,不久就成为红褐色斑。随着虫量增多,红斑面积逐渐扩大,以至全叶焦黄脱落。
Camellia spider mite is mainly spider mite (Panonychus citri Margioni), the general size of about 0.26 ~ 0.50 × 0.36 ~ 0.19 mm, pear round, body was reddish brown or reddish brown. Occurrence of drought conditions is the dominant spider rampant occurs. In particular, 1-3 years of Camellia seedlings, victims of low plant height most obvious. In addition thin plants and shade to a low degree, microclimate temperature is higher, lower humidity, but also conducive to spider mite reproduction. Harm on the back of the mountain tea to spit suction device to suck the juice, the victim leaves the initial appearance of yellowish white spots on the front, and soon became brown spots. With the increase in the number of insects, erythema area gradually expanded, as well as the whole leaf brown off.