Eficiência do tratamento com fungicida químico e biológico no controle de Rhizoctonia solani em sementes de soja

Abstract

Brazil is a great dimensions country, and soybean represents in nearly decades, one of the most important crops playing a role of great importance in the world's food supply, enabling Cerrado biome expansion of agricultural areas. Large areas in monoculture bring challenges with them, such as the management of pests and diseases. Root rot is a disease caused by Rhizoctonia Solani fungus. The objective of this work was to carry out a comparison between chemical and biological fungicides in seeds treatment over two previously inoculated transgenic soybean varieties. The inoculation method was by water restriction and after placing the seeds on fungus colonized Petri plate. The seeds were planted in vases with fertilized and pH-controlled soil, irrigated frequently and placed at a controlled environment. Measurements of growth and number of leaves were taken during the vegetative development of the plant, such as fresh matter. The chemical fungicide, Maxim XL, results better plant health and development than the biological fungicide, Serenade. Cultivar AS3707 proved more tolerance to the fungus than AS3680.