Estudo e desenvolvimento de um fertilizante foliar à base de fécula de mandioca com adição de óleo de neem

Abstract

This study aimed at the investigation and development of a foliar fertilizer based on cassava starch with the addition of neem oil, along with studying and incorporating essential nutrients into the formulation for healthy plant development. The product formulation was calculated to meet the demands of calcium and boron, crucial for plant growth. Two formulations were prepared with varying amounts of added boron and calcium, and for both, the pH was maintained close to 7. After formulation, efficiency and applicability tests were conducted. Efficiency tests were carried out in the field, where the fertilizer was applied to kale plants to assess its ability to provide nutrition and protection against pests. The results showed a significant improvement in height, with treated plants exhibiting an average height 25% greater, along with 23% more healthy branches. Regarding the quantity of healthy leaves, there was no significant difference between treated and untreated plants. In terms of pest protection, the foliar fertilizer did not show significant impacts, as even with treatment, 2 leaves showed holes in the treated plants, while the untreated ones did not. The product's applicability was also evaluated in the field using a manual compression applicator, and the application was not hindered by the viscosity obtained. Furthermore, satisfactory leaf adhesion was observed. Finally, the desired biofilm formation on the leaves was observed, achieving the study's objectives.