番茄在栽培中常发生卷叶现象,导致果实直接暴露于阳光下,不仅影响果实膨大,严重者会引起日灼病等。严重卷叶有两种情况,一种是病害引起的卷叶,如病毒病;一种是生理性卷叶,本文介绍后一种情况。一、发生原因 1.整枝过重大、中型果的栽培品种在大量整枝、摘心后,植株上部留的叶片过少,叶片制造的光合产物较少, Tomato leaf curling often occurs in the cultivation, resulting in direct exposure to sunlight in the fruit, not only affects the fruit enlargement, severe cases can cause sunburn and so on. There are two serious cases of leaf curl, one is caused by leaf rolling diseases, such as viral disease; one is the physiological leaf roll, the paper describes the latter case. First, the occurrence of reasons 1. Pruning too heavy, medium-sized fruit cultivars in a large number of pruning, topping, leaving the upper part of the plant leaves too little leaves less photosynthetic products,