Penetração cuticular / estomatal e sua influência na eficácia de fertilizantes foliares e agrotóxicos

Abstract

The better understanding of the mechanisms involved in the process of cuticular penetration and stomatal penetration has once again been a source of innovation and interest for researchers, given the recent technological advances. The present work presents two articles, whose objective is to elucidate aspects related to cuticular and stomatal penetration and the interference of salts in the behavior of foliar fertilizers and pesticides. The first article entitled “Cuticular penetration of foliar fertilizers: evidence for Zn and Mn co-penetration with K ions”, presented a possibility of increasing the penetration of manganese. Contact angle, surface tension, deposition formation, atomic absorption spectrometry for quantification of penetration indices and foliar fertilizer interactions were measured. In conclusion, the use of KSCN increased penetration rates for Mn. In the second article entitled ‘‘Influence of potassium salts on the increase the activity of two herbicides’’, we evaluated the potential of potassium thiophanate to increase herbicide efficiency when applied 48 hours before the application of the herbicides paraquat and bromoxynil. Interferences of the treatments were measured by digital image processing to quantify the increase / reduction of efficiency. The use of KSCN before the application of herbicides, led to an increase in the efficiency of both herbicides.