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小麦个体的生活力与稈黑粉病的发生有密切的关系。在受病的植株中,常常发现一些生长强壮的分蘖,不表现明显病症;而生长衰弱的发病严重。高感或高抗品种试验均一致显示:大粒种子长起的植株,稈黑粉病发病率低;小粒的发病率高,约为大粒种的2—3倍。大粒种子抗病,主要是由于它的生活力较强。播种期对稈黑粉病的发生有很大的影响:秋播发病重,在武功以10月上、中旬播种的发病率最高。但在春播中,经多年来试验,许多对稈黑粉病高感或中感的冬小麦品种均变为完全免疫。其主要原因是由于春播破坏了病原物、寄主及环境三者在进化中所形成的相互一致性,并在小麦个体内造成不利于稈黑粉病菌发展的内在条件。试验说明:小麦受稈黑粉菌侵染后,病菌与寄主间的相互关系可以采用的某种农业措施而被干扰,并可达到防治病害的目的。
The viability of wheat is closely related to the occurrence of stalk smut. In diseased plants, it is often found that some grow strong tillers, do not show obvious symptoms; while the growth of a weak onset is serious. High susceptibility or high resistance varieties are the same test showed: large seeds grow up plants, stalk powdery mildew incidence rate is low; the incidence of small grains, about 2-3 times larger species. Large grain seed disease, mainly due to its strong viability. Sowing date on the occurrence of stalk powdery mildew have a great impact: the autumn sowing incidence of heavy, in the martial arts in October on the mid-sowing the highest incidence. However, in spring sowing, many winter wheat varieties that are highly susceptible or susceptible to stalk black powder disease have become fully immunized after many years of testing. The main reason is that the spring planting has destroyed the mutual coherence formed by pathogens, host and environment in evolution and caused the internal conditions that are not conducive to the development of stalk powdery mildew in wheat individuals. Test Description: Wheat stalk black fungus infection, the relationship between bacteria and host can be used for some agricultural intervention and interference, and can achieve the purpose of disease prevention.