Enhancing rainfastness of contact fungicides with adjuvants

摘要

In our experiments we evaluated the effect of rapeseed (RSO), linseed (LSO) and soybean (SBO) oil ethoxylates as tank-mix-adjuvants on deposit formation and rainfastness of the contact fungicide mancozeb. Rainfastness of mancozeb alone was low, and the wash-off caused by a five millimetres simulated rain (5mm/h) could be reduced by adding selected RSO, LSO and SBO adjuvants to the spray solution. Enhancement of the rainfastness clearly depended on the number of ethylene oxide (EO) units in the hydrophilic chain. Improved rainfastness was achieved by adding the adjuvants RSO 5EO, LSO 10EO and SBO 10EO to the spray solutions.