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首页> 外文期刊>Weed Science >Effect of Soil Organic Matter on the Interaction Between Nicosulfuron and Terbufos in Corn (Zea mays)
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Effect of Soil Organic Matter on the Interaction Between Nicosulfuron and Terbufos in Corn (Zea mays)

机译：土壤有机质对玉米中烟嘧磺隆与萜类化合物相互作用的影响

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Greenhouse and laboratory experiments were conducted to determine the effect of soil organic matter on the synergistic interaction between nicosulfuron, a sulfonylurea herbicide, and the insecticide terbufos in corn. Terbufos was applied infurrow at planting to soils containing 1,3, and 5% organic matter and nicosulfuron was applied POST to corn at the three-leaf growth stage. The combination of terbufos and nicosulfuron reduced corn fresh weight 75,45, and 41% in soils containing 1,3, and 5% organic matter, respectively. Terbufos increased [~(14)C]nicosulfuron uptake into corn grown in both 1 and 5% organic matter soils. Terbufos decreased epicuticular leaf wax deposition on corn leaves by 35 and 18% in 1 and 5% organic matter soils, respectively. [~(14)C]Nicosulfuron was completely metabolized after 24 h in the absence of terbufos. In the presence of terbufos, 19 and 11% of intact [~(14)C]nicosulfuron remained 24 h after treatment while 11 and 6% remained after 48 h in the 1 and 5% organic matter soils, respectively. In vivo acetolactate syn-thase activity was reduced to 3 and 20% of control by nicosulfuron at 24 h and to 6 and 38% of control at 48 h, respectively, in the 1 and 5% organic matter soils that contained terbufos. These experiments indicated that soil organic matter is an important factor in determining the level of injury expected from the synergistic interaction between nicosulfuron and terbufos in corn. Nomenclature: Nicosulfuron, 2-[[[[4,6-dimethoxy-2-pyrimidinyl]amino]car-bonyl]amino]sulfonyl]-N,N-dimethyl-3-pyridinecarboxa-mide; terbufos, S-[[(1,1-dimethylethyl)thio]methyl]O,O-di-ethyl phosphorodithioate; corn, Zea mays L. 'Pioneer 3475.'
机译：进行了温室和实验室实验，以确定土壤有机物对烟嘧磺隆，磺酰脲类除草剂和杀虫剂特布福斯在玉米中的协同相互作用的影响。在种植时，将Terbufos施用到含有1,3和5％有机质的土壤上，然后在三叶生长期将nicosulfuron POST施用到玉米上。在含有1，3和5％有机质的土壤中，terbufos和烟嘧磺隆的组合分别降低了玉米鲜重75.45和41％。 Terbufos增加了在1和5％有机质土壤中生长的玉米对[〜（14）C]烟嘧磺隆的吸收。在1％和5％的有机质土壤中，Terbufos分别将玉米表皮上的表皮蜡沉积减少了35％和18％。 [〜（14）C]烟嘧磺隆在不存在terbufos的情况下24小时后完全代谢。在存在terbufos的情况下，处理后24小时仍保留19％和11％的完整[〜（14）C]烟嘧磺隆，而1和5％有机质土壤中48小时后分别保留11％和6％。在含有terbufos的1％和5％有机质土壤中，烟酰胺磺脲在24 h时体内乙酰乳酸合酶活性分别降低至对照的3％和20％，在48 h分别降低至6％和38％。这些实验表明，土壤有机质是决定玉米烟嘧磺隆与萜品磷之间协同作用所预期伤害水平的重要因素。命名法：烟嘧磺隆，2-[[[[[[4,6-二甲氧基-2-嘧啶基]氨基]羰基]氨基]磺酰基] -N，N-二甲基-3-吡啶甲酰胺； terbufos，S-[[（（1,1-二甲基乙基）硫代]甲基] O，O-二乙基二硫代磷酸酯；玉米，Zea maysL。“先锋3475”。

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