YIELD, SEED WEIGHT AND PROTEIN CONTENT OF FIELD PEAS AFTER SOIL AND FOLIAR TREATMENTS OF SIMAZINE AT SUBLETHAL LEVELS

Abstract

Simazine [2-chloro-4,6-bis(ethylamino)-s-triazine] was applied at rates of 0.002–0.800 kg a.i./ha to field peas (Pisum sativum L.) as soil and as foliar applications for 4 yr. Band applications to the soil surface over the seeded rows and incorporated beside the seeded rows in a clay soil had no effect on seed yield or protein content. However, seed yield was increased 25% in the year that seeding was early (3 May) in a fine sandy clay loam, and seed placed into the center of a band into which simazine at 0.4 kg a.i./ha had been rototilled to a depth of 10–12 cm. There were no differences in weight per seed or protein content. Foliar applications were not effective.