Adjuvants for products used in agriculture
||Vitaly Kocherbitov, Anton Fagerström, Karin Bergström, AzkoNobel Surface Chemistry AB,Peter Westbye and AkzoNobel Surface Chemistry AB
||KK-stiftelsen, Malmö högskola
||2008-01-01 -- 2013-12-31
||Biofilms Research Center for Biointerfaces
||Faculty of Health and Society, The Department of Biomedical Science
Akzo Nobel is a major supplier of adjuvants for products used in agriculture. Adjuvants are used to increase effectivity of active ingredients (AI) when administered to plants. Akzo Nobel has therefore a specific interest to obtain better structure/mechanism/function understanding for their surfactants, in order to facilitate the design of molecules with even better function as adjuvants. The current project focuses on bioavailability of AI’s, like fungicides, herbicides and pesticides.
Tebuconazole, listed as a systemic fungicide that absorbs through leaves, is proposed as the first model active ingredient (AI). This substance is currently used against e.g., rust on wheat and leaf fungus (crops, as well as other plants like roses). While Akzo Nobel has good understanding for which adjuvants work in different types of delivery systems and with different AI’s, general understanding of the mechanism through which adjuvants improve AI effectivity is missing,
The goal of this project is then to investigate how surfactants with known adjuvancy improve AI effectivity in plants. The first goal will be to determine if adjuvants affect penetration of the AI through the upper side of a dicot plant membrane, lacking stomata. While it is assumed that penetration is important to effectivity, this is not a given, and has never been demonstrated. Depending upon the results of the first goal, the project is then expected to broaden in order to explain the adjuvancy mechanism as well as how it is affected by environmental and formulation properties. The potential effect in various layers of the plant membrane (i.e., the epicuticular wax, the cuticular wax and the upper epidermis) as well as in the phyllosphere, may be addressed.
1. Fagerström A, Kocherbitov V, Lamberg P, Bergström K, Westbye P, Ruzgas T and Engblom J; Factors Affecting Transport of Tebuconazole over Silicone Membrane and Leaf Cuticle; in 9th International Symposium on Adjuvants for Agrochemicals, ISAA Society; Baur P and Bonnet M Eds.; August 2010, Pages 329-336 ISBN 978-90-815702