Tratamento de sementes com produtos químicos e biológicos no controle de Meloidogyne incognita na cultura do milho

Abstract

The seed treatment for control and suppression of pathogens that attack early stages of the crop has been widely used because of the systemic and residual efficacy of this practice. The nematode attack of the genus Meloigodyne is characterized by the presence of gall in the root system of the crop, causing a reduction in its development, as well as symptoms of nutritional deficiencies and potential loss of production. The purpose of this research was to evaluate the interaction of doses of chemical and biological products to control the Meloidogyne incognita in corn crop by means of industrial seed treatment. The experiment was conducted at the Farm Cristalina, located in the town of Indianópolis-MG on January 19 to May 18, 2018. A completely randomized blocs was used, with nine treatments and four replications. The products that was used to treat the seeds of hybrid RB9006 PRO3 was: BAS 798 F (Bacillus amyloliquefasciens), Standak Top (Fipronil + Pyraclostrobin + methylthiophanate), Quartzo (Bacillus subtillis ¬+ Bacillus licheniformis) e Avicta (Abamectin). At 30th and 60th days after emergence, the treatments did not differ among themselves in terms of plant height and stem diameter. Regarding reproduction factor, it was observed that the treatment with Standak Top obtained good results, but the addition of the organic product BAS 798 F maintained the control. Regarding the production characteristics, there were no differences in the mass of 100 grains and number of grains per spike; the numbers differed only as regards the length of spike.