Ozone-Metolachlor Interactions on Corn (Zea mays), Bean (Phaseolus vulgaris), and Soybean (Glycine max)

Abstract

The potential interactive effects between metolachlor [0, 0.1, 0.5, and 1.0 ppm (w/w)] and the air pollutant ozone (O3) [0.2 and 0.4 ppm (v/v)], on growth of corn, bean, and soybean were examined under controlled conditions. At both concentrations, O3alone reduced corn and bean dry weights but only affected bean at 0.4 ppm (v/v). Shoot dry weight of corn was reduced by O3plus metolachlor more than expected, thus indicating synergism. The expected dry weights of bean and soybean treated with metolachlor plus O3were similar to or higher than expected, thus indicating additive or antagonistic interactions.

Tolerância de cultivares de feijão ao s-metolachlor em diferentes condições de aplicação

“…). Esses resultados estão de acordo com os de Machado Neto et al (1988), porém divergiram dos observados por Penner & Graves (1972), Putnam & Rice Junior (1979), Rodrigues et al (1984), Van Rensburg & Van Dyk (1986), Mersie et al (1989) e Henderson & Webber (1993), os quais constataram toxicidade do metolachlor na cultura do feijão.…”

Effects of Safener CGA-154281 on Metolachlor/Atrazine Injury to Corn (Zea mays)

“…Sweet com seedling emergence from cool soils was decreased by metolachlor also (2). Mersie et al (10) reported that the air pollutant ozone (O3) ap peared to increase metolachlor phytotoxicity to com.…”