论文部分内容阅读
小麦白粉病是由小麦白粉病菌侵染所引起,菌丝体表生于叶片正面,背面较少,以吸器伸入寄主表皮细胞内吸取养分。在施肥水平高、播种密度大、品种抗病性差的小麦田块,白粉病特别严重。因为在上述条件下,小麦各植株间通风透光性较差,湿度增加,有利于白粉病菌分生孢子的萌发和再侵染,茎叶嫩绿,有利于病原菌的侵入。我省一般在小麦三叶期就开始发生小麦白粉病,直到小麦成熟。严重感病的小麦品种友谊麦、器西哥29、矮丰1号等,从植株脚叶到剑叶,叶面铺满棉絮状的菌丝,颖壳和芒上也长
Wheat powdery mildew is caused by the infection of wheat powdery mildew, the mycelial surface is born on the front of the leaf, and the back is less. The inhaler penetrates into the host epidermal cells for nutrient absorption. In the high level of fertilization, planting density, poor resistance to disease in wheat plots, powdery mildew is particularly serious. Because of the above conditions, the poor ventilation of wheat plants, humidity, conducive to the germination and re-infection of powdery mildew conidia, green stems and leaves, is conducive to the invasion of pathogens. In our province, wheat powdery mildew begins to occur in the wheat three-leaf stage until wheat matures. Severe susceptible wheat varieties Friendship wheat, Mexico Xi 29, Aifeng 1, etc., from the plant leaves to the flag leaves, leaves covered with cotton-like mycelium, glume and Mount also long