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秋植豆角生长环境气温高,降雨量较多,加上田间春植豆角遗落的菌源(夏孢子)大。因此,秋植豆角易发生锈病,农户应及早进行综合防治。一、主要症状:豆角整个生长期均可感染病菌发病,但在始花至结果期间抗性减弱,感病性增强。该病以侵害叶片为主,发病初期的叶片下面出现星星点点褪绿黄白色斑点,斑点逐渐增多,直至密布整张叶片。在病斑相应的背面生成黄褐色稍突起的斑痂点即夏孢子堆,夏孢子堆破裂后散出大量的夏孢子,生长后期的老叶片上有时形成黑色的冬孢子堆。叶片枯黄脱落,植株矮小,荚少而小,生育期缩短,最后枯瘦而死。
Autumn planting beans growth environment temperature is high, more rainfall, coupled with the field spring bean spawn (spores) large. Therefore, autumn planted peas prone to rust, farmers should be integrated as soon as possible. First, the main symptoms: beans throughout the growth period can be infected with pathogens, but the initial flower to the results of the period weakened resistance, susceptibility increased. The disease to infringe the leaves, the early emergence of the leaves appear below the dots faded yellowish white spots, spots gradually increased until the entire leaf over dense. In the back of the lesion to generate a little yellow brown spots spot crusts that the summer spores, summer spores rupture after the release of a large number of summer spores, old leaves at the late growth sometimes form black winter spore pile. Leaves withered off, short plants, pods small and small, shortened growth period, and finally dead skinny.