大豆疫霉根腐病传播途径研究  

TRANSMISSION OF Phytophthora ROT OF SOYBEAN

作　　者：文景芝[1] 李兆林[2] 周艳玲[1] 

机构地区：[1]东北农业大学农学院植保系,哈尔滨150030 [2]中科院黑龙江农业现代化研究所,哈尔滨150040

出　　处：《大豆科学》2000年第3期223-228,共6页Soybean Science

摘　　要：对带菌土壤、病残体进行传病试验 ,研究了人工接种条件下种子带菌条件及带菌种子传病情况 ,结果表明 ,带菌土壤和病残体无论是在当年还是越冬后都可有效地传播大豆疫霉根腐病 ,是大豆疫霉根腐病的主要初侵染源和传播途径。人工接种可以导致大豆种子带菌 ,但只有在病菌直接接触到豆荚才有这种结果。幼荚期接种豆荚可以使荚内的豆粒严重发病 ,豆粒被一层菌丝包裹 ,这些豆粒虽然本身不能萌发 ,但能作为接种体导致邻近的健康植株发病。作者通过大量的播种试验 ,到目前为止还末能证实来自自然发病田的种子常规越冬后能够传病 ,相关工作正在进行中。Sudies on the trannsmission of Phytophthora root rot of soybean had been carried out with the soil debris and the seeds which came from natural diseased fields as well as the soil and seeds which inoculated with the pathogen. It shows that Phytophthora root rot of soybean is mainly transmitted by the soil and dcbris which naturally infected with pathogen, The seeds can be infected when the young seed pod is inoculated with pathogen. When planted, these seeds can cause nearby plants to be infected although they can not germinate themselves. So far we have no sufficient evidence to testify the seeds naturally infected with the pathogen in growing field can transmit this disease.

关 键 词：大豆疫霉根腐病 传播途径 土壤 病残体 种子 

分 类 号：S435.651[农业科学—农业昆虫与害虫防治]