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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。
It was proved by indoor screening and pot experiment that Pythium oligandrum had antibacterial effect on Rhizoctonia solani AG-4, P.ultimum, P.spinosum and P.irregulare, in which tomato seeds were treated with oospores of P.oligandr-um The control effect of P.ultimum and P.solani AG-4 on seed rot and cataplexy was good, with control effects of 79.4% and 63.6% respectively. P. oligandrum mainly parasitizes R.solani AG-4, which invades a large number of mycelium, whereas P. multimum mainly takes the form of antibiotic, which secretes cell wall dissolved material to dissolve its mycelium.