河南红枣产量居全国首位,近年来由于枣锈病流行,损失甚重,据内黄、新郑两大枣区估计年减收干枣3千余万斤。1980年红枣采收季节,曾测定新郑枣区重病树和轻病树的鲜枣百粒重,灰枣因锈病使鲜枣百粒重减少50.2％,鸡心枣减少37％。病株的果粒大多皱缩,果肉很少,不堪食用。枣锈病引起早期落叶后,还促使病株在秋季二次发芽,影响次年产量。 夏孢子的越冬和侵染 Henan jujube production ranks first in the country, in recent years because of the jujube rust epidemic, the loss is very heavy, according to Neihuang, Xinzheng two jujube area estimated annual reduction of dried dates more than 3 kg. 1980 harvest date of red dates, Xinzheng jujube area has been determined heavy tree and light tree 100 jujube weight, jujube due to rust so that the hundred jujube weight loss of 50.2%, 37% reduction of heart of chicken. Most of the diseased strains of fruit shrinkage, very few flesh, unbearable consumption. Jujube rust caused early deciduous, but also to promote the second plant in the autumn germination, affecting the following year’s output. Overwintering and infection of summer spores