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 angustifolia similar to "A. karatto". The "A. vivipara" of Miller (1768) and Smith et al. (2008) seem different, of a much smaller habit and narrower leaves, from the "A. vivipara" of Trelease (1913) and García-Mendoza and Fernando Chiang (2003), of a much larger habit. Agave angustifolia Agave angustifolia (Caribbean agave) is a plant which is native to Mexico and Central America. It is used to make mezcal and also as an ornamental plant, particularly the cultivar 'Marginata'. The "World Checklist of Selected Plant Families" regards "Agave angustifolia" as an illegitimate synonym for "Agave vivipara" L. Other sources maintain them as distinct