论文部分内容阅读
1984年秋,甘肃省种植引进南斯拉夫玉米自交系母本773,穗期田间发生大面积枯死.病菌侵染玉米茎部维管束,致使植株叶片从上到下枯萎而死,病情发展迅速,造成严重为害.经调查发病率为66~98.9%.根据病原菌形态、培养性状和致病性试验,鉴定为直枝顶孢霉菌Acremonium strictum W.Gams (=CePhalasporium acremoninm Cda)侵染而引致的玉米黑束病,该病在我国引进玉米上大发生还是第一次.种子检验发现南斯拉夫玉米杂交组合的种子,均不同程度带有病原菌,带菌率为1.25~13%.经研究明确,南斯拉夫玉米自交系母本773对直枝顶孢霉菌高度感病,而当地品种中单二号和户单一号等表现抗病.田间大面积发病的菌源主要来自土壤.
In the autumn of 1984, Gansu Province planted 773 maize inbred lines of Yugoslavia, which were withered out in a large area at the ear stage. The pathogens invaded the vascular bundles of maize stems and caused the plant leaves to wilt from top to bottom and died rapidly. The disease developed rapidly and caused serious The incidence of the disease was 66-98.9% .According to the morphological, cultural and pathogenicity tests of pathogenic bacteria, it was identified as corn black beam disease caused by the infection of Acremonium strictum W.Gams (= CePhalasporium acremoninm Cda) , The disease is the first occurrence of large-scale introduction of maize in China.Seeds test found Yugoslavia hybrids of seeds, all with varying degrees with pathogens, with a carrier rate of 1.25 to 13% .Studies clearly, Yugoslavia maize inbred mother This 773 is highly susceptible to Acremonium acremonium, while the local breeds, such as single number two and household single number, show disease resistance, and the source of large-area disease in the field mainly comes from the soil.