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首页> 外文期刊>Aspects of Applied Biology >Fungicides for the control of foliar diseases in sugar beet: fungicidal and physiological effects.
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Fungicides for the control of foliar diseases in sugar beet: fungicidal and physiological effects.

机译：用于控制甜菜叶面疾病的杀菌剂：杀真菌和生理作用。

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摘要

Since 1997, triazole fungicides have largely replaced sulphur for the control of sugar beet foliar diseases on the c. 65 per cent of the crop area treated each year in the UK. In trials during this period where powdery mildew (Erysiphe betae) was severe, single full-rate applications of flusilazole+carbendazim (Punch C) and cyproconazole (Cabaret), applied in late July, gave yield increases of up to c. 9 adjusted tonnes ha-1 over untreated control plots. In 12 trials where disease occurred at low levels or was absent, average yield increases of 4 adjusted tonnes ha-1 (5%) over untreated plots were achieved. This apparent direct physiological effect of fungicides was accompanied by observations of enhanced green leaf retention in the autumn. Studies of leaf chlorophyll content and photosynthetic efficiency were made on plots treated with sulphur (to control powdery mildew) supplemented with either the triazole, Punch C, or a strobilurin fungicide, Comet (pyraclostrobin). Both physiological processes were enhanced in leaves in the mid-canopy in September, compared to plants treated with sulphur alone. The results indicated that senescence was delayed in those leaves that were still actively contributing to sugar accumulation during this period..
机译：自1997年以来，三唑类杀菌剂已基本取代了硫，以控制甜菜叶上的甜菜叶病。英国每年处理的农作物面积的65％。在此期间，白粉病（Erysiphe betae）严重，在7月下旬，单次全速施用flusilazole + carbendazim（Punch C）和cyproconazole（Cabaret）的单次施用可使单产最高增加c。在未经处理的对照样地上调整了9吨ha-1。在12例疾病水平低或没有的试验中，与未处理地块相比，平均产量增加了4个调整吨ha-1（5％）。杀真菌剂的这种明显的直接生理作用是伴随着秋天绿叶保留率提高的观察。在用硫处理（以控制白粉病），三唑（Punch C）或Strobilurin杀菌剂彗星（吡曲菌酯）补充硫（控制白粉病）的地块上研究了叶绿素含量和光合效率。与仅用硫处理的植物相比，9月中冠层的叶片中的两种生理过程均得到增强。结果表明，在此期间仍活跃地促进糖分积累的那些叶子的衰老被延迟了。

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