Spotted asparagus beetles feed only on asparagus fruits, not on the ferns. Asparagus is a favorite food of two very similar bugs: the asparagus beetle and the spotted asparagus beetle. Asparagus Beetle ID & Control. Here are some suggestions from MSU Extension that may help control asparagus beetles during harvest: Time sprays to have fresh insecticide residue on spears in the afternoon. Larvae and adults tend to be more active in the afternoon when the temperature and sunlight are greatest. A method for larval control in small gardens is to brush the plants with a broom. Is there a spray to use to eliminate them? what to do to get rid of asparagus beetles which leave black spots on the asparagus. Spotted Asparagus Beetles in Gardens. Try to avoid using chemicals to treat them as the chmicals are likely to kill some of your natural helpers. The beetles feed as soon as they emerge and several days later egg laying begins. When handpicking the adult beetles, take off the dark brown asparagus beetle eggs from the asparagus spears. The asparagus beetle is blue or black with six off-white spots on its back. Control begins with keeping a clean area where you grow asparagus. Larval feeding continues for 10 to 14 days at which time, larvae migrate to the soil and pupate. Appearance. Both species of adult beetles have a slim, long shape with hard wing covers. The common and spotted asparagus beetles are annual pests of asparagus in Wisconsin. Spotted asparagus beetle larvae are orange and adults are reddish orange with six prominent black spots on each wing cover. Asparagus beetle control during harvest. Plants affected. The species Crioceris asparagi is more commonly known as the asparagus beetle, and it is quite similar to the species Crioceris duodecimpunctata, also known as the spotted asparagus beetle.You may find either of these species damaging your asparagus plants, although the asparagus beetle is more commonly a problem. #2 – Preventative Measures. Managing Outbreaks: There are two generations of asparagus beetle between May and September. Adults are blue-black beetles with a red prothorax. Adult asparagus beetles are up to 8mm long. Asparagus beetles need to be controlled on seedlings, during fern growth, and at harvest. In fall, clean up garden debris to minimize overwintering. Common asparagus beetles appear slightly earlier in spring than the spotted species. Other creatures such as beneficial wasps and poultry can also help keep these insects under control. Crioceris, or asparagus beetle, is a genus of the family Chrysomelidae of beetles.The name is neo-Latin from Greek κριός, ram and κέρας, horn. During summer months stunted, light yellow... Purple Spot. Not all species in the genus Crioceris feed on asparagus (e.g., C. nigropicta).Some studies have found low genetic diversity among groups of isolated Chrysomelidae, and use Wolbachia species as a genetic marker. The registered insecticides for treating asparagus beetle are pyrethrins, permethrin, carbaryl, and Malathion. Biology. Of the two, the spotted asparagus beetle is much less of a concern, so it’s important to be able to tell them apart. Please check out our asparagus beetle control and insect killer products for more details about how they work … repels flies, including mosquitoes the carrot fly, asparagus beetles and whiteflies: borage: repels tomato hornworm and cabbage worms: castor bean: repels moles: catnip: repels ants, flea beetles, aphids, the Japanese beetle, squash bugs, weevils, the Colorado potato beetle, the cabbage looper, and cockroaches. July 2, 2014. 1 Response. Identification. Crioceris duodecimpunctata (L.) Family – Chrysomelidae. Prevention and Control. Handpick adults or knock them into a container of soapy water. Plant an intercrop of calendulas, nasturtiums, or tomatoes which also seem to repel beetles. Cover your patch with garden fabric until harvest ends. In small patches handpicking can control asparagus beetles. Both adults and larvae can also be removed by hand and dropped into a bucket of water. The common asparagus beetle is the most prevalent and the only one that causes economic damage to asparagus. Biological Control: The most important natural enemy of common asparagus beetle is a tiny parasitic wasp (Tetrastichus asparagi) that attacks the egg stage. Asparagus Beetle-Killing Insecticidal Soap. Asparagus beetles undergo a physiological process to prepare their bodies to withstand freezing temperatures during winter. May attract cats. Or, an alternative is to plant only male-hybrid varieties, which have no berries and will eliminate fall populations of the spotted asparagus beetles. Temperatures can only get so low before beetles begin to die so beetles seek out shelter so they are protected as much as possible from freezing temperatures. Rice County Minnesota. I tried picking off the beetles and putting them in soapy water to kill them. Pesticide control Large plantings, where hand removal is not feasible, can be sprayed with the organic contact insecticide pyrethrum (e.g. Avoid spraying when asparagus or crops in neighboring fields are flowering. Adults are bright orange with six small black spots located on each wing cover. This has the effect of knocking the larvae to the ground. Should large aphid populations develop, consult your state agricultural extension or the current North Carolina Agricultural Chemicals Manual for up-to-date recommendations. Remove weeds, dead and dying plant debris. Both stages of this insect feed on asparagus stems and the resulting damage will turn the stem brown/dead above the point of feeding asparagus beetle control. Spotted Asparagus Beetle. Their elytra (wing covers) have yellow spots and red borders. Common asparagus beetle. Identifying Asparagus Beetles and Spotted Asparagus Beetles. Adults are slightly larger than common asparagus beetles. If you have an asparagus patch, keep an eye out for the highly destructive asparagus beetle starting early in summer (if not sooner). A rule of thumb is that if you spot an adult beetle on 1 in 10 plants or larvae on 50 to 75 percent of the plants, you should use some kind of control. Larvae are grayish white. Asked May 11, 2016, 5:50 PM EDT. Now that we have a thriving asparagus patch, our garden has exactly what this annoying pest most desires. To ensure proper use of insecticides, refer to the most recent edition of the Midwest Vegetable Production Guide (BU-7094-S). Infected mature plants decline in productivity and growth. How To Identify and Control The Asparagus Beetle. Look out for the beetles in the afternoon when they are most active. Pest & Disease Control for Asparagus Plants Crown & Spear Rot. Wasps kill eggs by feeding on them. Asparagus aphids are subject to control by at least 31 species of natural enemies (predators, parasites, and diseases). These parasitoids also lay their own eggs inside the beetle eggs. This beetle is one of the major pests of asparagus in the garden and damage is caused by both the larva and adult insect. Appear as soft water-soaked lesions on shoots and at soil line, or slightly above or below. This annoying insect is about half a centimeter long and is a metallic bluish-black color with white or yellow spots on its back. The larvae have difficulty reclaiming the plant and will often expire on the ground. Cut spears quickly after they reach eating size and clean up all plant debris and weeds at … Collect and destroy berries for spotted asparagus beetle control. Its back also has a red border. And before you take effective steps for beetle control, the pest has had already destroyed the existing plants. chamomile Lesions... Fusarium Wilt. Keep spears harvested to reduce the opportunity for egg-laying. Safer ® Brand offers a variety of asparagus beetle control and insect killer products to help control and eliminate this garden pest and revive your plants. Asparagus beetles are a disgusting problem for people who grow asparagus. Adults appear in mid to late spring as asparagus spears are emerging through the soil. As a result, chemical control is rarely necessary. May 4, 2019 By Doug. Asparagus; About Asparagus beetle. While it’s generally recommended that you use these options in … While spears are developing and after harvest as ferns grow on: Knock beetles, larvae, and eggs from spear and plants with a strong stream of water. Asparagus beetle larvae are dark, green-gray grubs about 1/3 inch (9 mm) long when fully grown. You should also wipe away any eggs you see either on the spears or on the leaves of the ferns later in the season. However, in a small asparagus patch, those numbers might still mean only a few beetles, which are easily handpicked from the plants. 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