Avaliação dos tratamentos biológico e químico na redução de patógeno em semente de soja

Abstract

Soy represents one of the most important crops of recent decades in Brazil, playing a role of great economic responsibility in the world and enabling the expansion of arable areas in the Cerrado biome. Large areas in a soybean-corn succession system bring with them challenges, such as the management of pests and diseases. The objective of this work was to carry out a comparison between chemical (Maxim XL®) and biological (Serenade®) fungicides in the treatment of seeds in two transgenic soybean varieties previously inoculated with the fungus Rhizoctonia solani. The inoculation method by water restriction was used, which consists of placing the seeds inside the plate colonized by the fungus, infecting the seed. The seeds were sown in vases with fertilized and corrected soil, irrigated frequently in a controlled environment. Measurements of plant height and number of leaves were carried out throughout the vegetative development of the plant. Treatments did not differ statistically showing the effect of phytotoxicity at high doses.