Metam potassium (metam-K) is a soil fumigant used commonly in Florida at the end of the tomato and pepper production season. The fumigant essentially cleans a field by killing the established weeds and crops after harvest. The goal of this project was to determine the optimal rate of metam-K for the effective termination of tomato, pepper, and established weeds such as purple nutsedge, goosegrass, and dogfennel. Tomato, pepper, and purple nutsedge at bed center were effectively terminated with the metam-K rate of 65 kg ha−1. Optimal rates required for the termination of goosegrass and dogfennel were 91 and 156 kg ha−1, respectively. In contrast, metam-K at 500 to 680 kg ha−1 was required to terminate purple nutsedge on bed edges. The reduced efficacy of metam-K at bed edge might be related to the limited movement of metam-K in soil.

中文翻译：

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确定杂草、番茄和辣椒终止的最佳偏钾速率

Metam 钾 (metam-K) 是一种土壤熏蒸剂，通常在佛罗里达番茄和胡椒生产季节结束时使用。熏蒸剂基本上通过在收获后杀死已形成的杂草和农作物来清洁田地。该项目的目标是确定 metam-K 的最佳用量，以有效杀死番茄、胡椒和已形成的杂草，如紫罗兰、鹅草和狗茴香。65 kg ha 的 metam-K 率有效地终止了床中心的番茄、胡椒和紫罗兰色-1. 终止鹅草和狗茴香所需的最佳比率为 91 和 156 公斤公顷-1， 分别。相反，metam-K 在 500 至 680 kg ha-1被要求在床边终止紫色的nutsedge。metam-K 在床边的效力降低可能与 metam-K 在土壤中的有限运动有关。