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首页> 外文期刊>Journal of Turfgrass Management >Purple nutsedge control by halosulfuron or imazaquin/MSMA in turfgrass in the tropics.
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Purple nutsedge control by halosulfuron or imazaquin/MSMA in turfgrass in the tropics.

机译：在热带地区，通过草甘膦或吡虫啉/ MSMA对紫色草篱的控制。

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摘要

Field and greenhouse experiments were conducted in 1992 and 1994 to determine the extent of purple nutsedge (Cyperus rotundus) control in bermudagrass (Cynodon spp.) turf by halosulfuron or imazaquin/MSMA, and to determine the extent of purple nutsedge regrowth from basal bulbs after foliar treatment with these herbicides. Excellent initial control (>80%) of emerged shoots of purple nutsedge occurred with halosulfuron or imazaquin + MSMA. However, purple nutsedge shoots emerged within 3 or 4 weeksafter all treatments, and nutsedge shoot density increased with time. With a rapid increase in purple nutsedge shoot density, the extent of control deteriorated rapidly, even after two applications of halosulfuron. Both halosulfuron at 70 g/ha and imazaquin at 0.42 kg + MSMA at 1.7 kg provided complete reduction of regrowth from basal bulbs 7 weeks after treatment. At 4 months after treatment, all pots treated with imazaquin + MSMA had nutsedge regrowth, but only 1 of 5 pots showed regrowth from halosulfuron, thus both treatments provided substantial, but not complete, control or regrowth. The short period of field control likely results from sprouting of previous dormant nutsedge tubers that are unaffected by soil residual activity of halosulfuron orimazaquin.
机译：在1992年和1994年进行了田间和温室试验，确定了用卤虫磺隆或imazaquin / MSMA控制的百慕大草（Cynodon spp。）草皮中紫色八角（Cyperus rotundus）控制的程度，并确定了后基部鳞茎中紫色八角的再生长程度。用这些除草剂进行叶面处理。卤化磺隆或吡虫啉+ MSMA可以很好地控制紫色nuts的出苗芽（> 80％）。然而，在所有处理后的3或4周内会出现紫色的新梢，并且新梢的密度随时间增加。随着紫色小枝芽密度的迅速增加，即使在两次施用卤磺隆后，防治程度也迅速恶化。 70 g / ha的卤代磺隆和0.42 kg的阿马西喹+ 1.7 kg的MSMA均可在治疗后7周完全减少基茎的再生长。在处理后的4个月，所有接受imazaquin + MSMA处理的盆都有长毛再生，但是5个盆中只有1个显示出卤磺隆的生长，因此，两种处理均提供了充分但不完全的对照或再生。短期的田间控制很可能是由于先前休眠的八角类块茎的萌芽所致，而这些块茎不受卤磺隆奥利莫喹的土壤残留活性的影响。

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