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Effects of root-and stolon-infecting fungi on root-colonizing nematodes of white clover

机译：根茎和sto茎真菌对白三叶草根定殖线虫的影响

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摘要

The effects on white colver (Trifolium repens) of different combinations of the nematodes meloidogyne trifoliophila, Helicotylenchus dihystera and Heterodera trifolii and nine stolon-infecting and three root-infecting fungi were studied in a glasshouse experiment. The presence of the fungus Phytophthora megasperma alone increased (P < 0.001) root-rot alternata, interacted and increased root-rot severity. Combinations of P. megasperma with Pythium irregulare, and P.nebulosa with Phoma medicaginis or A.alternata, increased M.trifoliophila populations. Several other fungi (P.irregulare, P.nebulosa, Colletotrichum coccodes, Macrophomina phaseolina, P.medicaginis and Phoma sp.) interacted with the nematode M.trifoliophila causing severe root-knot symptoms. The results indicated that fungi and nematodes interacted to cause root and stolon rot and reduced yields, and that poor persistence of white clover in pastures is likely to be a problem with a complex etiology.
机译：在温室实验中研究了线虫，三叶线虫，双螺旋线虫和三叶线虫的不同组合以及九种茎和三种根系感染真菌对白col（白三叶）的影响。单独存在的巨大疫霉菌会增加（P <0.001）根腐交替发生，相互作用并增加根腐严重程度。巨精假单胞菌与不规则腐霉的组合，以及白假单胞菌与药用番茄或嗜盐气单胞菌的组合，增加了M.trifoliophila种群。其他几种真菌（P.irregulare，P.nebulosa，Colletotrichum coccodes，Macrophomina phaseolina，P.medicaginis和Phoma sp。）与线虫M.trifoliophila相互作用，引起严重的根结症状。结果表明，真菌和线虫相互作用会引起根腐病和茎腐烂并降低产量，并且牧场上白三叶草的持久性差可能是病因复杂的问题。

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