寡雄腐霉重寄生作用的研究  

ON THE ANTOGONISM BY HYPERPARASITE PYTHIUM OLIGANDRUM

作　　者：贺水山[1] 张炳欣[1] 葛起新 

机构地区：[1]浙江农业大学

出　　处：《植物病理学报》1992年第1期77-82,共6页Acta Phytopathologica Sinica

摘　　要：通过室内筛选和盆栽测定证明:寡雄腐霉(Pythium oligandrum)对Rhizoctoniasolanl AG—4,P.ultimum,P.spinosum和P.irregulare有抗生作用,其中以P.oligandr-um的卵孢子处理番茄种子对P.ultimum和P.solani AG—4引起的种腐,猝倒防治效果较好,防效分别为79.4%和63.6%。P.oligandrum对R.solani AG—4主要以菌寄生为主,菌丝能大量分枝侵入,而对P.ultimum主要以抗生为主,分泌出胞壁溶解物质溶解其菌丝。Screening in laboratory and testing in pot planting proved that P.olig-andrum was antogonistic against R.solani AG-4,P.ultimum,P.spinosum and P.irregulare.Treating tomato seed with oospores of the P.oligandrum resultedin effective reduction of 79.4% and 63.6% seed rot and damping-off inducedby P.ultimum and R.solani AG-4.P.oligandrum was principally parasitic onR.solani AG-4 and it's hyphae greatly branched and penetrated the hyphaeof R.solani AG-4.However,P.oligandrum was antibiotic to P.ultimum onlywith releasing substances to dissolve the hyphae of the latter.

关 键 词：寡雄腐霉 重寄生作用 

分 类 号：S432.44[农业科学—植物病理学]