红蛋巢菌属生防菌的筛选及其对油菜菌核病的防治潜能

通过对采自云南的红蛋巢菌属（Nidula)鸟巢菌标本进行平板筛选，获得BNF71等11个核盘菌具有较强抑制作用的菌株。温室防病试验表明，BNF71和BNF137菌株的代谢液对核盘菌引起的油菜菌核病具良好防治效果，发病率防效分别达98．8％和86．1％，病斑扩展抑制率分别达99．7％和97．9％。BNF71活菌接种对油菜出苗的防病效果达85．2％。除抑制核盘菌外，BNF71对Aspergillus niger,A.flavus,Pythium ultimum,Rhizoctonia solani和Drechslera sorokiniana等重要的植物病原菌亦有不同程度的抑制作用。Nidula菌株具有较高的木聚糖酶活性，BNF134具有显著的外几丁质酶活性。

Screening for Nidula species as novel biological control agents to Sclerotinia sclerotiorum

out of 39 isolates of Nidula spp from Yunnan province showed clear inhibition zone in dual culture test with S.sclerotiorum . Greenhouse trials with cultural filtrate of BNF71 and BNF137 showed reduction disease incidence by 98.8% and 86.1%, inhibition lesion enlargement by 99.7% and 97.9%, respectively. Wheat bran culture preparation of BNF71 was also effective in suppression of rapeseed seedling stem rot caused by S.sclerotiorum , with disease decreased by 85.2%. In addition to the highly antagonism against S.sclerotiorum , BNF71 and BNF162 were able to inhibit Aspergillus niger, A.flavus, Pythium ultimum, Rhizoctonia solani and Drechslera sorokiniana in vitro . Nidula isolates possessed high xylanase activity, and BNF134 exhibited significant exo-chitinase activity.