Influence of different additives on herbicidal efficacy in rice
1994
Street, J.E. (Mississippi State Univ., Stoneville (USA)) | Teresiak, H.
Field studies about the herbicidal efficacy of quinclorac with 280 g ai/ha and a mixture of propanil and molinate, each of them in tankmixture with different additives, were conducted from 1991 to 1993 in rice (Oryza sativa). Additives used in this study were defined to be either polyoxyethylene (POE), mineral-oil-based concentrates (MOC) or vegetable-oil-based concentrates (POC). Quinclorac controlled Echinochloa crus-galli (L.) Beauv. and Ipomoea lacunosa L. 80 % or greater when applied with BHC 864, Penetrator Plus or Primeoil 2. However, 9 out of 14 additives used in this study showed similar results. Propanil/molinate was studied with 10 additives on Echinochloa crus-galli, Ipomoea lacunosa, and Sesbania exaltata (Raf.) Rydb. ex A. W. Hill. In 1992 no significant differences among treatments occurred, but in 1993 some adjuvants increased efficacy of the herbicides. This is discussed in relation to different temperatures at application time in 1992 and 1993. Best results were found with Penetrator, Soysurf and Primeoil which are classified as penetrating agents. Other additives with the same classification did not perform as well. Both herbicides showed comparable results with some additives of POE, MOC and POC, but additives of the same group varied significantly in their response on herbicidal efficacy
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