Evaluating effective Trichoderma isolates for biocontrol of Rhizoctonia solani causing root rot of Vigna unguiculata

The highly diverse genus Trichoderma has provided many formulations that are alternatives to the chemical pesticides in agriculture.The present study was undertaken to investigate the biocontrol potential of eight Trichoderma species,T.atrobrunneum,T.guizhouense,T.paratroviride,T.pyramidale,T.rufobrunneum,T.simmonsii,T.thermophilum and T.viridulum,against the phytopathogenic fungus Rhizoctonia solani.Trichoderma isolates were first evaluated in vitro by dual culture tests for their antagonism,mycoparasitic ability and antifungal activity against R.solani.Their growth promoting potential was further assessed in relation to phosphate solubilization,indole acetic acid and siderophore production.Five of the isolates were selected and evaluated for their abilities to prompt plant growth and to control R.solani infecting Vigna unguiculata(cowpea)seedlings in vivo.Two most effective isolates,T.guizhouense 9185 and T.simmonsii 8702,significantly(P<0.05)reduced the disease severity incidences(36.6 and 45.0%,respectively)and promoted plant growth,which have good prospects for application.

Notes on the genus Byssosphaeria （Melanommataceae） from China

The genus Byssosphaeria from China was briefly reviewed based on specimen examinations and literature work. Taxonomic and nomenclatural problems are discussed. Among the previously recorded taxa of the genus, a new combination, Byssosphaeria hainanensis, is made and a new Chinese record, B. alnea, is reported. A key to the known species of the genus in China is provided.

Preliminary survey of the Helvellaceae from Xinjiang, China

Xinjiang is in the northwest of China. It occupies more than 1/7 of the China mainland territory (Fig. 1). The area is covered with deserts, grasslands, conifer forests, broadleaf trees, and shrubs.……

基于动态演化视角的新一代信息技术产业评价研究

【目的/意义】本文结合新一代信息技术产业的发展,拟构建我国新一代信息技术产业评价指标体系。【方法/过程】基于动态演化视角,以29个省(市、区)为样本,综合考虑新一代信息技术产业的技术创新性、高新技术特性和渗透性,通过多指标综合评价新一代信息技术产业发展水平。【结果/结论】中国新一代信息技术发展水平整体呈不断上升态势,并存在明显不平衡性,应提高信息技术应用水平、高新技术企业数量和产业规模。

祁连山子囊菌——盘菌纲和锤舌菌纲

研究了采自甘肃省祁连山的133份盘菌标本,对它们进行了详细的形态学观察,鉴定出45个种,它们隶属于粪盘菌科、裸盘菌科、地锤菌科、胶质盘菌科、柔膜菌科、马鞍菌科、毛盘菌科(新拟)、软盘菌科(新拟)、火丝菌科、斑痣盘菌科和寡囊盘菌科,包括4个新种(祁连山缘刺盘菌、祁连山粪裸盘菌、祁连山新胶鼓菌和华肿长毛盘菌)、3个中国新记录种(秆膜盘菌、硫磺色膜盘菌和短孢索氏盘菌)。文中详细比较了新种与相近种的形态差别。