油菜主要病虫害有：菌核病、病毒病、霜霉病、萎缩不实病、蚜虫、菜青虫、黄条跳甲等。在播种前必须采取有效措施进行预防，并在苗期适时适量用药防治，可以防止或减轻病虫害的发生，省工，省力，经济有效。1．实行轮作对于多年种植油菜并且发病重田块，可改种小麦、蚕豆、豌豆 The main pests of rape are: sclerotinia, virus disease, downy mildew, atrophy atrophy, aphids, Pieris rapae, Tripterygium parachutes and so on. Before sowing, effective measures must be taken to prevent it. In the seedling stage, appropriate amount of drug should be used to prevent and control the occurrence of pests and diseases. Labor-saving, labor-saving and cost-effective are also available. 1. The implementation of rotation for many years planting rape and the incidence of heavy fields, can be planted wheat, broad beans, peas