论文部分内容阅读
近几年来,玉米丝黑穗病在鄂西山区二高山地带迅速蔓延,对产量损失很大。为了解此病发生及防治情况,我站组织有关植保站进行了抽样调查,结果如下: 一、发生为害情况 (一)发病程度:该病在我省从1978年开始上升,以后逐渐蔓延,1982年以后,部分地区成为毁灭性病害,如建始县1982年发生面积7万亩左右,1985年上升到12万亩,占种植面积的三分之一,损失产量累计达400万公斤以上。1986年调查鄂西、保康等7州县,种植面积265.1万亩,发病面积89.48万亩,占总面积33.75％;一般病株率1.0～40.0％,严重田块达70.0％,
In recent years, maize smut spread rapidly in the two alpine areas of western Hubei mountainous areas, which have a great loss of yield. To understand the occurrence of the disease and its prevention and control, I organized a sample survey on the plant protection station. The results are as follows: I. Occurrence of the disease (I) Incidence of disease: The disease started to rise in our province from 1978 and then gradually spread in 1982 Years later, some areas became devastating diseases. For example, the area in Jianshi County in 1982 was 70,000 mu and in 1985 it rose to 120,000 mu, accounting for one-third of the acreage and the cumulative loss was 4 million kilograms. In 1986, Hubei Province and Baokang County were surveyed in 7 counties and counties, with a planting area of 2.651 million mu and an incidence area of 89.48 million mu, accounting for 33.75% of the total area. The average disease rate was 1.0-40.0% and severe fields reached 70.0%