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 × arizonica Agave × arizonica Agave" × "arizonica is a rare plant, endemic to Arizona. It is a hybrid between two species of "Agave" in the family Asparagaceae, "A. chrysantha" and "A. toumeyana" var. "bella". It was discovered in the 1960s near a summit of the New River Mountains, near the Maricopa-Yavapai county line north of Phoenix, Arizona. "Agave" × "arizonica" is a small plant about 30 cm high and 40 cm broad. Although similar to "Agave utahensis", it has distinct differences in suckering more sparingly, in not forming a large dense clump, having leaves with a distinct dark brown margin and