If one of your Agaves die from weevils, DON’T use its surviving pups in your landscape. •Control is difficult •Once damage is apparent, control is impossible. Damage by the `Yucca Weevil', Scyphophrus acupunctatus, is most extensive in the cane. More recently, we have found introduced agave or yucca weevils to UNF. One such pest is the Agave Borer Weevil and its close cousin the Yucca Weevil. otherwise that I feel the use of pesticides are appropriate. In outdoor landscapes, add-ing copious amounts (up to 25%) of pumice will improve drainage and soil structure. The very large Agave americana or century plant is more susceptible to weevil damage than the smaller species. Leafhoppers fed with 1% Yucca saponin or 5% crude-saponin of alfalfa died within 2–3 days due to toxic effects and non-preference of the diet containing saponins. Mary and Gary Irish had a good suggestion in their outstanding book, Agave, Yuccas and Related Plants: A Gardeners Guide (2000, Timber Press). and other members of the genus Yucca in the southwestern region of the United States and Baja California (Waring 1986). Because of the damage from these insects, we have stopped planting Yucca filamentosa in large groups on campus. Agave Snout Weevil (Scyphophorus acupunctatus). The white grub-like larvae tunnel under the bark which can girdle and therefore kill the plant and also tunnel in the tip killing the growing plant. Either I have both types or they are indiscriminate. The Yucca Weevil. The agave snout weevil ( Scyphophorus acupunctatus ), also known as the sisal weevil, feeds on many species of agave and can be especially damaging to the larger species such as century plant ( Agave americana ) and blue agave ( Agave tequilana ). It this instance though the larvae start in the bud and burrow well down into the trunk before causing collapse. The yucca simply does not need a lot of water and should be properly drained of moisture to thrive. While checking the crevice garden for more yucca damage I noticed Agave 'Blue Glow' had telltale signs of yellowing bottom leaves. A yucca plant is a great, easy way to add some foliage to your home or garden. The adult weevil attacks many species of agave. Agave Snout Weevil (Scyphophorus acupunctatus) ... damage occurs on Y. aloifolia, Y. gloriosa, and Y. recurvifolia, es- ... and yucca successfully in heavy clay soils. Yucca filamentosa (wild plants) in northeast Florida If you grow eastern arborescent yucca such as aloifolia keep in mind that they are a suitable host for these things as well. Weevils as Biocontrol Agents ... •Unknown species? Agave Borer Weevil, (also known as the Agave Snout Weevil) and the Yucca weevil are devastating insect pests to members of the Agave and Yucca genera. Agaves and Yuccas are generally slow- Seed weevil damage. Cribrate and citrus weevils feed on foliage and bark, causing leaf drop, fruit drop, stunted growth, loss of leaves, twig dieback, reduced fruit yield and water stress. Instead, try to locate pups or bulbils from an Agave that successfully flowered and may have had some genetic resistance to weevils and likely passed that Damage. They are much more destructive than the skippers. Snout weevils are probably the most damaging pests to agaves and yuccas. The survival time of 10 days was observed with 0.1% yucca saponin and a lower concentration (0.01%) … The adult weevil is about ½ inch (12 mm) in length, is brownishblack and has a dull body (Fig. the monophagous yucca weevil, which feeds on Yucca whipplei Torr. 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