Trialeurodes vaporariorum (West.) is a pest of greenhouse vegetables and ornamentals and infests crops in Europe and in the American continent. In Brazil, just a few cases are known on economic crops, being all restricted to greenhouse crops. In 2003, in Itatiba and neighboring localities of State of São Paulo, Brazil, field infestations of T. vaporariorum were observed, mainly on tomato and gr...

Background Amaranthus is a genus of Amaranthaceae with ca. 75 species. Many them are economic importance as cultivated crops (grains or vegetables) ornamentals, while around 20 range from significant weeds to minor ones. Objective: List and differentiate the species (and subspecies) that belong in South America. Results: Thirteen four subspecies considered America; six great (A. blitum, [...]