Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Possibilities for improving the efficacy of glufosinate-ammonium.

Abstract

Attempts were made to improve the efficacy of standard formulation glufosinate-ammonium (200 g a.i./litre) by using a new formulation with a lower a.i. content (150 g) or by adding 1.0-2.35 litres/ha of an anionic wetting agent containing the Na salt of an alkyl-polyglycol ether sulfate (Genapol LRO). In pot trials with Calopogonium mucunoides and Paspalum conjugatum, it was found that the new formulation at equal rates of a.i. provided better control than the standard formulation, and that the efficacy could be further improved by additional surfactant. In a large number of field trials on a broad spectrum of test plants in Germany, the Philippines and Malaysia, it was found that the new formulation was equally effective as the standard formulation if they were applied at equal rates of formulated product. Moreover, it was observed that the former was the more effective of the 2 when applied at equal rates of a.i., and that by the addition of further amounts of surfactant even the rainfastness could be improved considerably.