忌栽柏树梨树的主要病害——梨锈病(赤星病),危害梨树的新梢、叶柄、叶片、果柄和幼果,使果枝萎缩,果实变形、腐烂和落果。而柏树,尤其是龙柏和桧柏,又是梨锈病菌的越冬场所。到了春暖季节,这些病菌又随风吹回到梨树上继续繁衍和危害梨树的生长发育。其次葡萄附近若栽柏树,则葡萄果实不易成熟。所以,在栽有梨和葡萄的果园周围忌栽各种柏树。 Avoid pear cedar pear disease - pear rust (brown spot disease), endanger pear shoots, petioles, leaves, stalks and young fruit, so that fruit atrophy, deformation, decay and fruit drop. The cypress, especially Cypress and cypress cypress, is the pest rusty winter place. In the spring season, these pathogens are blown back to the pear tree to continue to multiply and endanger the growth and development of pear trees. Second, if the cypress near the cypress, then the grape is not easy to mature fruit. Therefore, avoid planting various cypress trees around orchards planted with pears and grapes.