Sulfentrazone was recently granted food-use tolerance approval for use on Brassica head and stem, as well as Brassica leafy vegetables. To date, one sulfentrazone registrant has listed those crops on its use label. In coastal California multiple crops per year including Brassica vegetables are grown in rapid succession; therefore, to avoid injury to rotational crops, herbicides used in those fields must be carefully selected. Given concerns about the relatively long soil persistence of sulfentrazone, studies were conducted to measure the response of direct-seeded carrot, lettuce, onion, spinach, and seeded tomato planted 3, 6, 9, and 12 mo after sulfentrazone application at 0, 112, 224, and 336 g ai ha−1. Eight plant-back studies were conducted during 2010–11 and 2012–13. Data collected were injury estimates, and stand and dry weights. Results indicate that it is safe to plant carrot and tomato 3 mo after sulfentrazone application at rates up to 336 g ai ha−1. Lettuce and green onion should not be planted within 9 mo of sulfentrazone application. Spinach should not be planted within 12 mo of sulfentrazone application.

中文翻译：

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四个种植间隔蔬菜对磺胺嘧啶土壤残留物的响应

Sulfentrazone 最近获得了食品使用耐受性批准，可用于芸苔头和茎，以及芸苔属叶菜。迄今为止，一位磺胺嘧啶注册人已在其使用标签上列出了这些作物。在加利福尼亚沿海地区，包括芸苔属在内的多种作物每年都快速连续种植；因此，为避免对轮作作物造成伤害，必须仔细选择这些田间使用的除草剂。鉴于对磺胺嘧啶相对较长的土壤持久性的担忧，进行了研究以测量在 0、112 施用磺胺嘧啶后 3、6、9 和 12 个月种植的直播胡萝卜、生菜、洋葱、菠菜和播种番茄的反应。 , 224, 和 336 g ai ha-1. 在 2010-11 年和 2012-13 年期间进行了八项植物回溯研究。收集的数据是伤害估计，以及站立和干重。结果表明，在施用磺胺嘧啶后 3 个月以高达 336 g ai ha 的速率种植胡萝卜和番茄是安全的-1. 磺胺嘧啶施用后 9 个月内不应种植生菜和大葱。施用磺胺嘧啶后 12 个月内不应种植菠菜。