Agave tequilana Through the 1990s, diseases spread, particularly "Fusarium" fungi and "Erwinia" bacteria, exacerbated by the low genetic diversity of the agave plants. Other problems include the agave weevil, "Scyphophorus acupunctatus", and a fungus, "Thielaviopsis paradoxa". According to a 2004 study, additional pathogens, "Erwinia carotovora", "Enterobacter agglomerans", "Pseudomonas mendocina", and "Serratia" spp. are responsible for continued rot. The homoisoflavanones 5,7-dihydroxy-3-(4-methoxybenzyl)-chroman-4-one, 7-hydroxy-3-(4-hydroxybenzyl)-chroman-4-one and 4’-demethyl-3,9-dihydro-punctatin can be isolated from "A. tequilana". Agave tequilana Agave tequilana, commonly called blue agave () or tequila agave, is an agave plant that is an important economic product of Jalisco, Mexico, due to its role as the base ingredient
Agave neglecta Agave neglecta Agave neglecta, known as wild century plant, is endemic to central Florida. It is found in sandy soils, especially near the coasts. It has been rarely seen in the wild, although it has been documented via several photographs and sterile specimens. Coincidentally, the latter portion of its scientific name means "neglected" or "overlooked". It may represent a cultivar of "Agave sisalana" or "Agave kewensis". Some authorities express doubt regarding the species' nativity, stating that the species may have been introduced from Mexico during pre-Columbian years. The species is also known as Small agave in honor of its discoverer;