河南省红枣产量居全国首位,但由于枣锈病的为害,常造成减产甚至绝收.三年来曾对此病的发生、危害和药剂防治,进行了研究,现综述如下.一、枣锈病的危害性据统计,年产三千多万斤的内黄枣区,1970、1976和1977年都因枣锈病流行,使叶、果早落,仅收次枣300——400万斤.1980年红枣采收季节,又曾调查了新郑枣区锈病严重树与轻病树的鲜枣百粒重(见表1).由表1可知灰枣因锈病可使百粒重减 Henan Province, jujube production ranks first in the country, but due to the damage of jujube rust, often resulting in reduced or even absolute income .Three years has been the occurrence of the disease, the harm and prevention and treatment of pesticides were studied, are summarized as follows. According to statistics, with an annual output of more than 30,000 kilograms of yellow jujube region, 1970,1976 and 1977 are due to the prevalence of jujube rust, so that leaves, fruit early fall, only received the jujube 300 - 400 kg. Collection season, have also investigated Xinzheng jujube rust tree and light tree fresh jujube 100 grain weight (see Table 1) can be seen from Table 1 jujube rust due to 100-weight reduction