Remove any excess soil and compost piles from the growing area to prevent an alternative infestation site. This site is maintained by Center for Agriculture, Food and the Environment in the College of Natural Sciences. Longtailed mealybugs (Pseudococcus longispinus) have distinctive long tails (about ¾ or more of their body length), hence their common name. Resources from UMass Extension and the Center for Agriculture, Food and the Environment: For every litre increase in product, the percentage of mortality increased an average of 6.7%. We teach, learn, lead and serve, connecting people with the University of Wisconsin, and engaging with them in transforming lives and communities. Prune out light infestations or dab insects with a Q-tip dipped in rubbing alcohol. If the infested plant will be producing edible fruit or vegetables, you may want to limit your treatment to an organic active. Feedback, questions or accessibility issues: © 2020 The Board of Regents of the University of Wisconsin System. The recently introduced Pradia (cyclaniliprole and flonicamid) (MOA 28 & 29) has been reported to work well against longtailed and Madeira mealybugs. The citrus mealybug is more common on tropical foliage plants or soft-stemmed, succulent plants such as coleus, fuchsia, and cactus. When the mealybugs feed on the plant, it kills them. Connect with your County Extension Office », Find an Extension employee in our staff directory », Get the latest news and updates on Extension's work around the state, Feedback, questions or accessibility issues: | © 2020 The Board of Regents of the University of Wisconsin System Privacy Policy | Non-Discrimination Policy | Discrimination and Harassment Complaints | Disability Accommodation Requests | Civil Rights. Systemic insecticides may also be applied as foliar sprays, including dinotefuran (Safari), thiamethoxam (Flagship), imidacloprid (Marathon) and acetamiprid (Tristar) (MOA 4A). Controls insects, diseases and mites on fruit trees. Honeydew, sooty mold and the presence of ants may also be signs of a mealybug infestation. Some mealybug species, like the longtailed mealybug, give birth to live offspring. Chemical control is difficult because of the mealybug’s tendency to hide in protected locations and form dense colonies. For every litre increase in product, the percentage of mortality increased an average of 6.7%. Insect soap is a short-acting spray, and you must reapply weekly for as long as the pests are active. The following are the most important greenhouse species: Con excepción del testigo (P=0.8654), la mortalidad de cochinillas fue significativa (P<0.0001) a los 15 días después de la aplicación en todos los tratamientos. Las dosis crecientes evaluadas fueron: 0, 4, 6, 8 y 10 L ha‑1 en 2000 L de agua por hectárea con 5 repeticiones. However, the immature crawlers do not have this waxy covering, so consider the use of insect growth regulators such as azadirachtin (Azatin O etc. Mealybugs have pinkish-purple bodies but often appear white or light gray once they cover themselves in a cotton-like wax. Whether biological control agents can be used depends upon what mealybug species you have. The cottony coating protects them against predators and many control products, but you can outsmart them. Se observó un efecto lineal (P<0.0001) creciente en la mortalidad de cochinilla conforme aumentó la dosis. It is difficult to manage mealybugs with pesticides due to their waxy coating. The waxy covering on the adult mealybug makes it very difficult for insecticides to be effective. After laying eggs over a period of five to 10 days, the female dies. Be sure to disinfest containers before reusing them. Longtailed mealybug can be a major problem on plants grown in conservatories (e.g., cycads, orchids and ferns). La mayor mortalidad (78%) se observó en las plantas tratadas con 10 L ha‑1 superando (P=0.0252) el control promedio obtenido de4, 6 y 8 L. Dado que la mortalidad en el testigo fue muy baja (2%), la eficacia en el control fue similar al porcentaje de mortalidad. The mealybug Dysmicoccus brevipes is frequently found in Costa Rican pineapple plantations threatening the crop because of its association with the devastating disease known as pineapple mealybug wilt (PMW) caused by virus. 1. The waxy coating may also develop long projections on the ends of their bodies that give the illusion of tails or antennae. Other species, like the citrus and obscure mealybugs, lay masses of up to 100 yellow-to-orange eggs in a white cottony sac. Their primary role is to fertilize females. Longtailed mealybug (Pseudococcus longispinus) Chemical:  There are several insecticides available for control of mealybugs. Control:  Non-Chemical:  The best mealybug management is avoidance. There are two ways to get around it. Systemic insecticides applied as a drench may not work as well as the same products applied as a spray. Damage is usually noticeable when high populations are present. Check the label to make sure your plant is listed and always follow label directions for use. The other way is to smother them with an oil spray, such as Ortho® Fruit Tree Spray. Systemic insecticides must be applied preventively while plants are actively growing so that lethal concentrations of the active ingredient are present at feeding sites. The presence of black sooty mold fungi inhibits the ability of plants to manufacture food via photosynthesis, and detracts from the plants' aesthetic appearance. Nymphs are covered by a white waxy material, and are located in the crevices of growing medium or in excavated chambers on the outer edge of the root ball. They also have short, waxy filaments around the margin of their oval body, with a slightly longer pair of filaments at their rear. Early detection and then isolating infested plants is important to prevent mealybug outbreaks. If any information is inconsistent with the label, then follow the label. eggs or larvae may also help suppress mealybugs. All new plant material should be inspected upon arrival and any infested plants should be returned to the supplier. High-pressure water sprays are moderately effective at achieving control. 3. This species produces living young instead of eggs and can be identified by their long waxy filaments that protrude from the end of the abdomen. Send samples to an extension entomologist for identification of species to help give you more information to prepare your plan of attack. An experiment in a randomized complete block design was conducted to determine an effective Nemacur® 40EC (fenamiphos) concentration for its control. The citrus mealybug, (Planococcus citri) and longtailed mealybug (Pseudococcus longispinus) are two of the more common species. Read labels carefully for plant safety precautions and follow all resistance management guidelines. Egg-laying is temperature dependent with fewer eggs laid at high temperatures. Mealybugs are slow-moving, small, oval insects that are covered with a white, cottony wax. Insecticidal soaps and horticultural oils effectively kill eggs, nymphs, and young adults. Destroy heavily infested greenhouse plants as they will be difficult, if not impossible, and very costly to clean up. As growers know, they are one of the most difficult greenhouse pests to control. Appearance:  Mealybugs are pink, soft-bodied insects that range in size from 1/20 to 1/5 of an inch. Por tanto, un experimento en bloques completos al azar fue desarrollado para determinar una dosis efectiva de Nemacur® 40EC para su control. Mealybugs are often introduced into greenhouses on infested plants. For more information on biological control, refer to NCR publication 581 “Biological Control of Insects and Other Pests of Greenhouse Crops”. With exception of the untreated control (P=0.8654) mealybug mortality was significant (P<0.0001) 15 days after product application in all treatments. They appear as masses of wax and may occasionally be detected on the roots of wilting plants. Refer to UW-Extension publication A3744 “Insect Pest Management for Greenhouses” for a complete listing of available products. An increasing linear effect (P<0.0001) on mealybug mortality was observed as concentration increased. Karen Delahaut, formerly UW-Madison Fresh Market Vegetable Program Revised:  4/26/2004 Item number:  XHT1129. For more information on mealybugs:  See UW-Extension Bulletin A3744, or contact your county Extension agent. Contact insecticides will kill young, immature crawlers (provided there is good coverage). Contact sprays using insecticidal soaps are affective against the mealybug crawler stage provided coverage is thorough. Symptoms of mealybug feeding include stunting, chlorosis, defoliation, and wilting. For use on Indoor & Outdoor Plants. “Crypts” like it warm, above 70° F, with 70-80% RH where there are high mealybug densities. Susceptible plants, should be monitored closely and include coleus, rosemary, sage, Swedish ivy, artemesia, Ipomoea, palms and gardenia. Adding a spreader sticker such as Capsil may help improve needed coverage, if the label allows.