桧柏是风景绿化树种之一,因绿化需要,近几年在一些城郊梨园附近,栽植了不少桧柏树,以致使梨锈病大面积发生,造成落叶,严重影响了果品的产量和质量。为什么梨园周围栽植桧柏,会使梨锈病大发生呢?因为梨锈病是由真菌引起的病害,病菌以菌丝体在第二寄主桧柏树的幼嫩组织上越冬,第二年春季在遇有持续降雨两天以上, Juniper cypress is one of the landscape trees, because of the need for greening, in recent years in some suburbs near the pear, planted many cypress trees, resulting in large areas of pear rust, causing leaves, seriously affecting the yield and quality of fruit. Why pear orchards around planting cypress, pear rust will happen? Because pear rust is caused by fungal diseases, the mycelium of mycelium in the second host cypress cypress young organizations overwintering, the spring of the second year in the event Continuous rainfall more than two days,