摘要
摘要：在室内控制条件下，测定了SF-193菌株培养液对空心莲子草的致病力；在田间小区试验的条件下，测定了SF-193对空心莲子草的防除效果，以及不同因子对SF-193除草效果的影响程度。结果表明，SF-193培养3～5d的培养液具有最强的致病力；最佳接种体为含有菌丝体的培养液；田间有效接种浓度为10倍稀释液，室内有效接种浓度为25倍稀释液；适宜SF-193对空心莲子致病的最佳温度为25～30％；高湿条件下SF-193致病过程加快。SF-193对不同生长季节和不同生境下的空心莲子草均有较好的防除效果。
Alternanthera philoxeroides has become a serious weed in China. A pathogenic fungus SF-193 was isolated in Yizheng of Jiangsu Provinces in 2005. SF-193 appeared to be specific and capable of severely damaging and thus suppressing the weed both in laboratory and in the field. Results showed that culture conditions and inoculum were important to the development of SF-193. Fresh potato dextrose broth, 28℃, and shake-culturing for 3 -5 d were the most effective. The optimal inoculum was the culture solution which contained mycelial and filtrate. Inoculum＇ s density and wetness duration influenced the efficiency of SF-193 to control A. philoxeroides ; a concentration of 1：10 （in fields） or 1：25 （in lab- oratory） and more than 8 h of high humidity duration after inoculation produced good infections on the weed at 25 - 30℃. SF-193 always provided good control of the weed at different environment and different season. Therefore, this fungus appeared to be a good candidate for further studies and a promising biocontrol agent to A. philoxeroides.
出处
《中国生物防治》
CSCD
北大核心
2007年第3期243-250,共8页
Chinese Journal of Biological Control
基金
江苏省农科院重点研究领域建设项目(011046410303)
