Synergistic Effect of Isourea and Triazinone Derivatives on Activity of Various Gibberellins

Abstract

The synergistic effects of 2-ethyl-3-methoxycarbonyl-l-(p-tolylcarbamoyl)-isourea and 4-ethoxy-l-(p-tolyl)-s-triazine 2,6(1H,3H)-dione on GA_{1,3,4,7,8,9,17,19,20 ana 53} in rice seedlings were investigated. Each synergist showed a very high effect when combined with GA_{1,3,9 or 17}, a high effect with GA_{4,7,19 or 20}, little effect with GA₅₃, and no effect with GA₈.