Comportamento de plantas daninhas a Rotylenchulus reniformis

Abstract

The phytonematode Rotylenchulus reniformis, widely distributed in various regions of Brazil, can establish associations with more than 140 plant species, some of which are considered weeds in the central-western region of the country. The purpose of this study was to investigate the hosting capacity of Rotylenchulus reniformis on various weed species of great relevance to agriculture in the Brazilian cerrado. The research was conducted in a greenhouse located at the IF Goiano - Campus Urutaí, in the municipality of Urutaí, Goiás. The experimental design adopted was entirely randomized, with eight replications, with the aim of gaining a deeper understanding of the interaction between phytonematodes and these weeds, highlighting their impact on the regional agricultural sector. Six weed species were evaluated: Euphorbia heterophylla, Portulaca oleraceae, Urochloa decumbens, Rhynchelytrum repens, Ageratum conyzoides and Bidens pilosa. The soybean crop, represented by the Brasmax Ultra IPRO cultivar, was used as a control. All species were inoculated with a population of 780 juveniles of Rotylenchulus reniformis, applied in doses of 3 mL per cup. The evaluation took place 65 days after inoculation and the Reproduction Factor (RF) was calculated. The treatments showed susceptibility to the multiplication of R. reniformis, highlighting the need for effective management strategies to be explored based on the results of this research.