The agave snout weevil is also a serious pest where blue agave is grown commercially for tequila and in foreign countries where agaves have been introduced as landscape plants. Symptoms - Damage by the `Yucca Weevil', Scyphophrus acupunctatus, is most extensive in the cane. Thrips are tiny, skinny insects that feed on yucca leaves, causing them to curl. Sandy soils should be avoided because they will drain very If you feel the need to control them, you can use the same recommendations as for controlling mealy bugs. 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. In a healthy plant, thrips won't do too much damage. Weevils. BioAdvanced Tree & Shrub Protect & Feed is unfortunately not formulated to control Yucca and/or Agave weevils. The Yucca Weevil (Scyphophorus acupunctatus) mainly attacks the cane of the yucca plant. Plant bugs ( Caulotops and other species) are small insects that occasionally build up in large numbers and damage agave plants by feeding on leaves, resulting in light yellow scars or spots. 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 The control of the sisal weevil … Eventually, the plant falls over and dies. 4) Weevils. IV-Field trials with insecticides in bulbil nurseries. A similar species also colonizes yuccas. Control of Root Weevils on Plants. ... beetles, weevils, leafhoppers, worms and moths. If one of your Agaves die from weevils, DON’T use its surviving pups in your landscape. Control of insect pests in crop plants and stored food grains using plant saponins: A review. Curculionidae, Coleoptera) in sisal in Tanzania. Hopkinson D; Materu MEA, 1970c. Agave Snout Weevil (Scyphophorus acupunctatus) ... and yucca successfully in heavy clay soils. Control of agave snout weevil is difficult, and infestations can be prevented by maintaining healthy plants and destroying infested plants. Control mealybugs by treating the plant with insecticidal soap. Snout weevils are beetles about ½ inch (12 mm) in … East Africa Agricultural and Forestry Journal, 35(3):278-285. The leaves begin to turn yellow and die, and a putrid smell emanates from the infected trunk. Mary and Gary Irish had a good suggestion in their outstanding book, Agave, Yuccas and Related Plants: A Gardeners Guide (2000, Timber Press). Yucca weevils can only be controlled by keeping the plant in its optimal conditions of dry soil, full sun and good air flow. Control - Many materials are registered and effective at controlling thrips. The product may be … Adult root weevils can be controlled with sprays of several kinds of pyrethroid insecticides such as permethrin, bifenthrin, cyfluthrin, or cyhalothrin. 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