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防治韭菜锈病韭菜锈病是由真菌葱柄锈菌属(pucciniaallii)侵染所致。该病菌在病株上以冬孢子及夏孢子越冬,也可在野生的葱蒜属植物上越冬、枯死叶片上病斑内夏孢子也能越复。夏孢子萌发适宜温度9—18℃,夏孢子借气流传播到数里至数百里,在终年种植韭菜地区,锈病发生终年不断。该病早春4月开始发病,5月中旬进入盛期。主要为害叶片,其次是花梗。发病初期产生退绿色斑点,后扩大变黄呈椭园形或纺锤形稍隆起的小黄疱斑(夏孢子堆)以后破裂散出黄褐色粉末状的夏孢子;秋季发病较重,秋末易在叶片上产生黑褐色小斑点(冬孢子堆)开裂后散出紫褐色粉末状的冬孢子,使叶片变细、枯黄,严重影响韭菜的产量和质量。
Prevention and treatment of leek rust Leek rust is caused by fungal genus Pucciniaallii infection. The bacteria in the diseased plants to winter spores and summer spores wintering, but also in the wild allium overwintering, dead leaves on the lesion within the summer spores can be more complex. The optimum temperature for the germination of uredospores is 9-18 ℃, and the summer spores spread to hundreds to hundreds of miles by airflow. During the year of planting leeks, the occurrence of rust continued throughout the year. The disease started in early spring onset in April, mid-May into the peak. The main damage leaves, followed by pedicel. The early onset of retreated green spots, after the expansion of yellowing was elliptical or spindly slightly raised small yellow blister (summer spores) after rupture scattered brown powdery summer spores; heavy onset in autumn, autumn easy on the leaves Produce dark brown small spots (teliospores) split after ruffled purple brown powdery teliospores, leaves thinner, yellow, seriously affecting the yield and quality of leeks.