The adult agave snout weevil chews on the lower parts of the agave plant, injecting the plant tissues with a bacteria as it chews, which causes them to rot. Agave snout weevil treatment is widely available in Arizona, New Mexico and zones where the plants are grow outdoors. Snout weevils prefer the wide-blade forms of agave such as Agave Americana in both the blue form and the variegated forms. This destructive and voracious insect seems to prefer the larger, broad-leafed species. Damage occurs quickly, followed by death because the bite of the weevil deposits bacteria that literally rot the agave. My wife found this one … These types of agaves (including A. sisal , which is grown for its fiber to make rope) contain very little succulent tissue, making them less attractive to weevils. Snout weevil control is essential in southwestern areas, especially where agave is grown to make tequila. Systemic insecticides with the active ingredient Imidacloprid have been effective in preventing and controlling the snout nosed weevils. Find more gardening information on Gardening Know How: Keep up to date with all that's happening in and around the garden. DESCRIPTION: Adults are dusty black weevils about one inch long, with a long snout. Snout weevil damage is extensive and soon leads to death of the plant. It is a black insect with the scientific name Scyphophorus acupuntatus. This particular species also shows some resistance to the agave snout weevil and is usually ignored by rodents. Apply the granular form and dig it into the soil around the agave. By: Bonnie L. Grant, Certified Urban Agriculturist. These types of agaves (including A. sisal , which is grown for its fiber to make rope) contain very little succulent tissue, making them less attractive to weevils. Although snout-nosed weevils can’t fly (yes, there are such things as flightless beetles), they sure can walk. The agave is a succulent plant also known as the Century plant. While members of the agave plant family have few real problems growing in our arid climate, the agave snout weevil is the one challenge that can give it fits. Another way to prevent or control agave weevil attacks is to plant agaves the weevils find “not attractive.” Horticulturists are working hard to develop specific snout weevil resistant cultivars. Over the past six years, I have acquired a small, but growing, collection of. One of my absolute favorite Agaves, in case you couldn't tell. Once an agave has bloomed, it is at the end of its life cycle and these plants are especially prone to agave snout weevil infestations. Sign up for our newsletter. The indoor agave gardener may have to look a little harder for products that will work against the weevils. The night before, soak (hose-water) the soil at the base of each agave to aid penetration. Agave snout weevil treatment is widely available in Arizona, New Mexico and zones where the plants are grow outdoors. Weevil-resistant agave varieties are also being selected and bred, but it may be years before a good supply is widely available. 2. Lost a yucca to Agave Snout Weevil. The adult weevil is about ½ inch (12 mm) in length, is brownishblack and has a dull body (Fig. Infested plants will show leaf wilt, followed by total collapse of the plant. There is some evidence that species like Agave angustifolia – with its exceptionally hard outside skin – are less susceptible to snout nose weevil. Larvae are similar to white grubs without legs. If your agave has already succumbed, replace it with a resistant variety so you don’t have to again go through the trauma of losing a favorite plant. Whenever I see an ailing Agave americana, the first thing I suspect is agave snout weevil. Agave Weevils in the Low Desert. Agaves are relatively problem-free, except for the aggravating agave snout weevil (sometimes referred to as sisal weevil). One day it will look fine, the next day the plant is wilted and the stiff rapier sharp leaves are flat to the ground. The weevil seems less inclined toward those with thin, flexible leaves, such as Agave attenuata; those with tough, hard-to-pierce leaves (such as agaves desmetiana, murpheyi, parryi, lophantha ‘Quadricolor’, ‘Sharkskin’, triangularis, victoriae-reginae and vilmoriniana); and those with slender, nonjuicy leaves such as agaves bracteosa, filifera and geminiflora. Sign up to get all the latest gardening tips! The bigger the agave plant, the more attractive it is to the agave snout weevil. The reversible symptoms of water deprivation include inward-curled leaves and a slouching posture. Agave Snout Weevil (Scyphophorus acupunctatus). A population of agave snout weevils can decimate the agave crop and then what will we put in margaritas? Not treating you take a risk of infestation, which may or may not happen this year or even next year. I'm seeing more of the variegated forms in … Smith G F, Figueiredo E, Klopper R R, Crouch N R, Janion C, Chown S L, 2012. Landscape agaves can survive months of drought once they are established, though they prefer occasional water. But they are hard to see on your plants because they hide in the soil and between the leaves at … About Agave Snout Weevils. Jennifer C. Giron Duque, University of Puerto Rico, Bugwood.org, Different Agave Plants – Commonly Grown Agaves In Gardens, Weevils On Sago Palms – How To Control Palm Weevils, What Are Rose Weevils: Tips For Controlling Fuller Rose Beetle Pests, Different Dieffenbachia Varieties – Different Types Of Dieffenbachia, Citronella As A Houseplant – Can You Keep Mosquito Plant Citronella Indoors, Houseplant Placement – Houseplants And Where To Put Them, Common Garden Birds Of Prey: Attracting Birds Of Prey To Gardens, Deadheading Hibiscus Flowers: Information On Pinching Off Hibiscus Blooms, Turk’s Cap Lily Information: How To Grow A Turk’s Cap Lily, Growing Bentgrass In Lawns – Best Bentgrass Varieties For Your Yard, Dream Garden Improvement - Back To Nature, Propagating Houseplants 101: Tips For Propagating Plants, Sprengeri Fern Plant: Growing Houseplants As Family Heirlooms. She lives atop a rocky hill surrounded by acres and acres of chaparral. What is the agave snout weevil? One cold-hardy variety that is less susceptible to damage is Parry’s agave ( Agave parryi, Zones 7–10); it has harder leaves that seem to deter the weevils. The indoor agave gardener may have to look a little harder for products that will work against the weevils. Apply the granular form and dig it into the soil around the agave. This pesky, stealthy insect loves specimen agaves like the Weber’s agave, along with the century plant, or Agave americana. The bite of the beetle injects bacteria which cause the plant tissues to soften and liquefy. I’m trying to make a website with some general info. The snout weevil seems to prefer Agave americana (especially older ones and variegates), but will go after other Agave species. Agaves approaching maturity, or those with a wide, blue-green leaf seem to be the most susceptible to damage by the snout nosed weevil. 1. Thread Title If you have large agaves, especially Agave americana, in your garden you may want to follow some preventative measures to limit the chances of your plants falling victim to attack. My Weber’s agave was looking so big and beautiful this past spring. The agave snout weevil (Scyphophorus acupunctatus) adult measures about 1/2-inch long, has a dull brownish-black body and a characteristic long snout. The first questions is whether or not to treat. This cousin of the boll weevil loves this species of agave the most. 16). The agave snout weevil is a nasty, little black beetle just 1/2 inch long that can take out a mature agave the size of a VW bus. Bradleya. 1 of 5 The damage to this century plant in the Hill Country could be from the agave snout weevil. Agave Snout Weevil. I ended up completely dissecting it to find the weevil larvae. Apply this snout weevil control once per month during the growing season. As the tissues soften and decay, the parent and its progeny are merrily munching away on your plant. The foliage will pull easily out of the crown and the center of the rosette is mushy and foul smelling. By the time this happens, snout weevil control is pointless for that plant, but if you have other succulents and agave, there are steps you can take to protect them. According to agave experts, growers, and pest management specialists, the best approach is preemptive: drench the soil around healthy agaves with a systemic insecticide that has. A half-inch long black beetle can take down a giant century plant. The weevil is a form of beetle and grows approximately an inch (2.5 cm.) Diazinon granules were once used to control agave snout weevils, but it is no longer available to home gardeners. Most Agaves are usually not hit by serious pests or diseases. Agaves in cultivation enjoy good drainage and regular water when the soil is going dry, but not much sooner. This makes it easier for the larvae and parent to eat the tissues, but it will eventually cause the collapse of even the most mighty of agave. Tom Gatz March 2001. Website by Monica Hemingway, Agave experts, growers, and pest management specialists advise drenching the soil around healthy agaves with a systemic insecticide containing. When you water, the chemical will slowly release down to the roots of the plant and then into the vascular tissue, protecting it from the pest. I first suspected that agave snout-nosed weevil had arrived in my rural community north of San Diego when I noticed a collapsed Agave americana in a friend’s yard. Forum rules This section is dedicated toward maintaining one active thread for each plant pest and disease. A new specific plant host for the agave snout weevil, Scyphophorus acupunctatus Gyllenhal, 1838 (Coleoptera: Curculionidae) in South Africa: a destructive pest of species of Agave L. (Agavaceae). Product labels don't say how much concentrate per gallon of water for agaves, so I go with the ratio for shrubs. From Garden Bits, photos by Valerie, on the 4th site listed in Member Notes. Triazanon is available at most nursery and garden centers. 8*) [ Reply to this comment | ] Discussion Threads about this plant. I’m seeing stands of dead yuccas around San Antonio. There is some evidence that this plant is resistant to the Agave Snout Weevil, Scyphophorus acupunctatus. In the video you can see one of the Weevil larvae. Sucessfully Treating the Agave Snout Weevil. Many master gardeners in the Southwest agree that the larger agave species seem to be more at risk than the smaller species. The insects usually choose unhealthy or old agaves to deposit their eggs. This is due to the bloom habit of the plant. 3. 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