Abstract

Mefenpyr-diethyl is a safener used for protection of cereal plants under applications of ACCase and ALS inhibitor herbicides. Current studies are describing safeners using a new approach, relating these products to stimulation action on plants. The objective of this work was to evaluate the stimulation action of mefenpyr-diethyl on soybean, wheat, and signal grass plants. The experiment was conducted in a greenhouse, under a completely randomized design, with four replications, in two seasons. Mefenpyr-diethyl (50 g a.i. ha⁻¹) was applied on soybean plants (at V4 stage), and wheat and signal grass plants (both with 15 cm height). The variables evaluated were plant height, dry matter, and lipid content of the three species, and number of tillers of wheat and signal grass plants. The application of mefenpyr-diethyl in the first season increased the number of tillers of wheat and height of soybean plants. The soybean presented 24 and 14% more dry matter than the control in the first and second season, respectively, and 0.5% more lipid content in plants treated with mefenpyr-diethyl. These results show the stimulation action of mefenpyr-diethyl on wheat and soybean plants, denoting its potential for growth promotion and indicating the need for studies with this approach. No effect was found for the signal grass plants.

摘要

Mefenpyr-diethyl是在ACCase和ALS抑制剂除草剂应用下用于保护谷物植物的安全剂。当前的研究正在描述使用新方法将这些产品与对植物的刺激作用相关联的安全剂。这项工作的目的是评估甲芬比二乙基对大豆，小麦和信号草植物的刺激作用。该实验是在温室中以完全随机设计，在两个季节中进行四次重复进行的。Mefenpyr-diethyl（50 g ai ha ^-1）分别用于大豆（V4阶段），小麦和信号草（高度均为15 cm）。评估的变量是三种植物的株高，干物质和脂质含量，以及小麦和信号草植物的分till数量。在第一季施用甲芬比尔-二乙基增加了小麦的分number数和大豆植株的高度。在第一季和第二季，大豆的干物质分别比对照增加了24％和14％，而用甲芬比-二乙基处理的植物中的脂质含量增加了0.5％。这些结果表明了甲芬比尔-二乙基对小麦和大豆植物的刺激作用，表明其具有促进生长的潜力，并表明有必要用这种方法进行研究。未发现信号草植物的影响。