Weedy Amaranthus species frequently cause economically significant reductions in crop yields. Accurate identification of Amaranthus species is important for efficient weed control, but Amaranthus species can interbreed, which might cause difficulty when identifying hybrid-derived specimens. To determine which of several economically important weedy Amaranthus species are most genetically simila...

The objective of this research was to evaluate the physicochemical characteristics Amaranthus spp. commonly happening in Brazil, besides defining efficiency different extraction processes phenolic compounds and antioxidant activity. Five species genus (A. spinosus, A. viridis, retroflexus, hybridus var. paniculatus e deflexus) were evaluated regard their such as vitamin C, soluble solids, pH, m...

Certain fungal, bacterial, and viral pathogens can be mass-produced and used as biological herbicides to control weeds in crops. This approach, referred to as the “bioherbicide” or the “inundative” biological control strategy, is based on our ability to manipulate certain weed-pathogen systems to cause highly damaging levels of disease epidemics during critical periods of weed interference and ...

Background Species of Amaranthus genus are common in agricultural areas Brazil. Such weeds problematic, and they bring complexity to the management mainly due herbicide resistance. Thus, monitoring mapping chlorimuron-resistant spp. is necessary detect resistance different locations Objective Elaborate discriminating dose distinction between populations that susceptible resistant chlorimuron mo...

A previously unknown glyphosate resistance mechanism, amplification of the 5-enolpyruvyl shikimate-3-phosphate synthase gene, was recently reported in Amaranthus palmeri. This evolved mechanism could introgress to other weedy Amaranthus species through interspecific hybridization, representing an avenue for acquisition of a novel adaptive trait. The objective of this study was to evaluate the p...