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首页> 外文会议>Annual Conference of the New Zealand Plant Protection Society >The control of tan spot of wheat (caused by Pyrenophora tritici-repentis: a possible emergingdisease in New Zealand
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The control of tan spot of wheat (caused by Pyrenophora tritici-repentis: a possible emergingdisease in New Zealand

机译：小麦棕褐色点的控制（由Pyrenophora tritici-reentis引起的：新西兰可能的兴趣

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Pyrenophora tritici-repentis, the cause of tan spot of wheat was first recorded in New Zealand in 1979, but only on wheat seed. However, this pathogen has recently been recorded as causing possible yield losses in isolated crops. A small plot trial set up in a central Canterbury crop of cv. Saracen tested several fungicides alone or in mixtures. Control was not entirely effective since tan spot infection was well established when the first applications were made at GS33 (third node detectible). Nevertheless, two triazoles (propiconazole and prothioconazole) and three SDHI fungicides (isopyrazam, bixafen plus prothioconazole and fluxapyroxad plus epoxiconazole) all gave similar levels of control either when applied alone or in mixtures. Two triazoles(epoxiconazole and difenoconazole) were less effective alone, while addition of strobilurin (pyraclostrobin) to mixtures gave little extra control. Several treatments showed significant increases in green leaf retention and final grain yield. The life cycle of the pathogen dictates that management of the over-wintering inoculum in stubble is a probable essential step in control of the disease.
机译：Pyrenophora tritici-rewentis，在1979年首次在新西兰首次记录小麦的棕褐色斑，但只在小麦种子上。然而，该病原体最近被记录成导致孤立作物中可能的产量损失。在CV的中央坎特伯雷作物中设立了一个小块试验。 Saracen单独或混合物中测试了几种杀真菌剂。由于在GS33（第三节点可测量）在第一次应用时，褐斑感染很好地确立，因此控制并不完全有效。然而，两种三唑（丙酰唑和瘙前胶质碱）和三种SDHI杀菌剂（异杂沙胺，Bixafen Plus瘙痒酚和Fluxafyroxad加环氧喹啉）全部在单独或混合物中施用时具有相似的对照水平。两种三唑（环氧亚氨基唑和苯甲酸苯并唑）单独效果较小，而添加斯特罗脲（Pyraclostrobin）与混合物略微对照。几种治疗表现出绿叶保留和最终籽粒产量的显着增加。病原体的生命周期决定了茬中的过冬含量的管理是控制疾病的可能基本步骤。

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