Control of Root Weevils on Plants. Control of insect pests in crop plants and stored food grains using plant saponins: A review. 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 Control - Many materials are registered and effective at controlling thrips. Hopkinson D; Materu MEA, 1970c. The Yucca Weevil (Scyphophorus acupunctatus) mainly attacks the cane of the yucca plant. Adult root weevils can be controlled with sprays of several kinds of pyrethroid insecticides such as permethrin, bifenthrin, cyfluthrin, or cyhalothrin. The control of the sisal weevil (Scyphophorus interstitialis Gyll. Thrips are tiny, skinny insects that feed on yucca leaves, causing them to curl. However, we do offer a spray product called BioAdvanced 3 in 1 Insect Disease & Mite Control that will control any type of weevil. Control of agave snout weevil is difficult, and infestations can be prevented by maintaining healthy plants and destroying infested plants. Symptoms - Damage by the `Yucca Weevil', Scyphophrus acupunctatus, is most extensive in the cane. In outdoor landscapes, add-ing copious amounts (up to 25%) of pumice will improve drainage and soil structure. A close relative of the agave weevil attacks yucca as well as agave plants. A similar species also colonizes yuccas. IV-Field trials with insecticides in bulbil nurseries. BioAdvanced Tree & Shrub Protect & Feed is unfortunately not formulated to control Yucca and/or Agave weevils. In a healthy plant, thrips won't do too much damage. Mary and Gary Irish had a good suggestion in their outstanding book, Agave, Yuccas and Related Plants: A Gardeners Guide (2000, Timber Press). The control of the sisal weevil … Eventually, the plant falls over and dies. 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. This insect bores in and opens the trunk to bacterial infection. The recommended treatment is to remove any yuccas that are infected. Control mealybugs by treating the plant with insecticidal soap. Yucca weevils can only be controlled by keeping the plant in its optimal conditions of dry soil, full sun and good air flow. 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. These are best applied on the lower trunk of the plants and around the base of the plant to kill the weevils as they climb. Agave Snout Weevil (Scyphophorus acupunctatus) ... and yucca successfully in heavy clay soils. If one of your Agaves die from weevils, DON’T use its surviving pups in your landscape. Curculionidae, Coleoptera) in sisal in Tanzania. 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. If you feel the need to control them, you can use the same recommendations as for controlling mealy bugs. 4) Weevils. The leaves begin to turn yellow and die, and a putrid smell emanates from the infected trunk. The product may be … Sandy soils should be avoided because they will drain very Weevils. East Africa Agricultural and Forestry Journal, 35(3):278-285. Snout weevils are beetles about ½ inch (12 mm) in … ... beetles, weevils, leafhoppers, worms and moths. & Shrub Protect & Feed is unfortunately not formulated to control them, you use... Your landscape ):278-285 at controlling thrips very the control of the sisal weevil ( Scyphophorus )... Are registered and effective at controlling thrips, thrips wo n't do much. 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