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 parviflora pollinated by bees such as bumblebees. This species is the smallest agave in Arizona and is sought by collectors. For this reason the species has declined in its native habitat. There are only about two dozen natural populations in Arizona. Other threats to the species include road construction and mining. The plant is valued in cultivation and has gained the Royal Horticultural Society's Award of Garden Merit. Subspecies of the plant include ssp. "parviflora" and ssp. "densiflora". Agave parviflora Agave parviflora is a species of succulent perennial flowering plant in the asparagus family, known by the common names Santa Cruz