简介:Anewendophyticantagonisticfungus,ChaetomiumspiraleND35fromPopulustomentosa,wasreported.Thebio-controltrialsofC.spiraleND35againsttheValsaCankerofapplewerepreliminarilyinvestigated.TheresultsofdualcultureonPDAplateshowedthatC.spiraleND35wascapableofstrongantagonismagainstValsaceratosperma,andforinhibitingthemycelialgrowthofV.ceratosperma,.thecrudeextractofliquidcultureofcornsteeppowderbrothwasmoreeffectivethanthatoneofmaltextractbroth(MEB).Theresultsofbio-controlingreenhouseandfieldindicatedthatthediseaseincidenceofappletreetreatedwithC.spiraleND35waslowersignificantlythanthattreatedbyothermethods.There-isolationexperimentsuggestedthatC.spiraleND35couldcolonizeinstemsandbranchesofappletreessuccessfully,andtheND35colonizationrateofthetreatmentwithsolidwheatbranculturewashigherthanthatofcornsteeppowderbroth,butthefieldexperimentresultthecontroleffectofliquidcultureofC.spiraleND35wasbetterthanthatofsolidculture.
简介:近年来,高压植保机械由于配置柱塞高压水泵,喷射压力高、射程远、喷量大、雾化好、生产效率高,因此很受农户欢迎。当前随着专业植保和无害化农业生产要求的曰益提高以及一些农机专业植保服务组织的相继出现,特别是在国家农机购置补贴政策的有力推动下,高压植保机械的推广应用步伐逐渐加快,仅以余姚市为例,每年的新增量均在100台以上,使用范围涵盖水稻、蔬菜、茶叶、花卉等农业领域。但在实际使用中,农户对机械性能及操作方法等知识掌握不足,导致一些故障的发生。因此了解常见故障的发生原因,掌握正确的故障排除方法,对于植保质量的保证和机械效率的发挥至关重要。下面根据当地使用中的常见故障逐一分析。