论文部分内容阅读
小麦根腐病的病原物主要是麦根腐长蠕孢Helminthosporinm sativum),分生孢子对温度要求不严,适应范围为6—39℃;对湿度要求较高。根据1981—1984年在黑龙江观察,除82年干旱叶片发病轻微外,其余三年病害都比较严重。小麦从幼苗到成熟随时都可受到病菌的侵染,先侵染地下根颈,然后从下部叶发展到剑叶、穗和籽粒,我们主要对种子和叶片受病菌侵染后的为害性进行试验并提出药剂防治的初步意见。
The pathogen of wheat root rot is mainly Helminthosporin sativum. The conidia are not strict with the temperature, the adaptation range is 6-39 ° C, and the humidity is more demanding. According to the observation from 1981 to 1984 in Heilongjiang Province, except for the slight incidence of drought in 82 years, the diseases in the other three years were rather serious. Wheat seedlings to mature at any time by the bacteria can be infected, the first infection of the underground neck, and then developed from the lower leaves to the flag leaf, ear and grain, we mainly on the seeds and leaves tested by the harmful bacteria after infection And put forward preliminary opinions on the prevention and treatment of pesticides.