禾谷类黑穗病的种类很多,常见的有小麦腥黑穗、散黑穗,大麦坚黑穗、散黑穗,谷子粒黑穗,高粱散黑穗、坚粒黑穗、丝黑穗,玉米丝黑穗等等。对于这一类病害的产量损失的估算,以往许多人都认为是比较简单的,即认为产量损失大体上等于发病率。这固然反映了一定的客观实际,但有时却也并不全然正确。由于作物群体间的补偿作用,实际产量的损失率往往低于发病率,这就需要针对具体情况加以区别对待。现举几种有代表性的黑穗病类做如下说明。 There are many types of cereal smut, common are wheat tainted black spike, scattered black spike, barley black spike, black spike, black spike of grain, black spike of sorghum, black spike of black grain, black spike of corn, corn Black silk and so on. For the estimation of the yield loss of this type of disease, many people in the past thought it was relatively simple, that is, the yield loss was considered to be roughly equal to the incidence rate. Although this reflects a certain objective reality, it is sometimes not entirely correct. Due to the compensatory effect among crop groups, the actual yield loss rate is often lower than the incidence rate, which needs to be treated differently. Here are some representative smut class to do the following instructions.