You can eliminate the aphids in a localized manner since they typically come in quite small groups. >If planting new apple trees, use rootstocks which are resistant to apple woolly aphid. Flonicamid (Mainman) is a good choice because it is selective, has low toxicity to natural enemies and is partially systemic. The woolly aphid occurs upon the apple. Overview . They are pinkish-brown but their waxy coating gives them a white, woolly appearance. But, if you want to do away with the creepy critters, or save your property from sticky honeydew, here’s what to do. Woolly apple aphid is a serious pest of apples, particularly young trees. It is a small brown, scale-like insect on the bark of the apple tree. White, waxy, sap-feeding aphids colonise cracks, crevices and pruning cuts on the bark of apple trees in the second half of spring. Aphids were assessed by counting the number of live aphids per colony. Elm trees in the vicinity of orchards increase the migration of the aphid to apple trees. Though the symptoms sound ugly, aphids actually don’t do much damage to healthy, mature trees. Thank you, Barbara >Use chemicals carefully if possible try to avoid, excessive use can harm trees and friendly insects and small birds. It’s so discouraging, none of the advice I find seems to apply to trees. HARITS AND GENERA!, D lSCUSSION. Other pests with which woolly aphid may be confused. At this time of year, you often see ants climbing up a fruit tree. Woolly apple aphids infest roots, trunks, limbs, shoots, and occasionally fruit of apple trees. This aphid is found in colonies on the aerial portions of the tree and on roots during winter. Infested nursery stock is also a source for spreading aphids. Woolly apple aphid colony with a mixture of live and parasitized aphids (E. Beers) The egg stage is not known to occur in Pacific Northwest orchards. Woolly apple aphid, Erisoma lanigerum (Hausmann), is native to North America and found in all apple growing areas in the United States and Canada. Treat as here. woolly apple aphid, aphid colonies and root galls were evaluated on apple roots in the fall. These woolly aphids commonly afflict beech trees. WAA have a complex life cycle that can involve overwintering either on apple or elm. Treatment here. They are there because they are looking after their herds of aphis. Some apple varieties, such as Northern Spy, are resistant to this pest. I noticed this disgusting mess on Cathi’s lovely pendulous crab apple. Above- ground colonies form at wound sites on trunks, limbs, and twigs, where they feed through tender bark (Figure 1). During late summer or autumn, apple trees with woolly aphid colonies or damage should be identified and marked for treatment the following season. The nymphs migrate up or down the trunk of infested trees during summer and fall. Will the bugs survive in the soil and destroy other plants also? Woolly aphid colonies are readily visible and visual inspection of the orchard is the main monitoring method. t ani maple+, as the woolly aphid of the apple cannot-live upon those trees. Data on Management of woolly apple aphids was recorded in District Doda of Jammu province during 2010-2011. Very messy trunk. 2). ... Woolly Aphids Treatment with Predatory Insects. And my front yard is nearly unusable during the best months in the PNW. Woolly Aphids Similar to normal garden aphids, these are most commonly found on apple trees and look like soft blobs of cotton that have attached themselves to smaller branches. The bodies of these bark-feeding aphids are completely covered by masses of white, wool-like, waxy materials. The objective was to determine if the systemic insecticide, spirotetramat (Movento® 150SC or Ultor® 150SC), reduced aphid colonies and root galls following spring and summer applications to apple tree canopies. They may return during most years. Nymph. They then spread to new growth and create soft swellings. It must have taken woolly aphid several years to create this state of affairs. However, we usually plant vegetables such as lettuce, beans, etc. It is mainly found on apple trees, occasionally on quince trees and very rarely on pear trees, as well as on several ornamental species. Tina, I share your pain and my aphid-infested elm trees are what landed me searching Google yet again and here on this post. None gardeners don’t see these things until it’s too late. I removed/reduced them with a fierce jet from a hosepipe (not 100% effective when tree in full leaf) followed by a soapy spray…. Types of Aphid Control Pesticides. This root injury can reduce the growth of young apple trees; mature trees are affected to a lesser degree. Cherry trees can be affected by black cherry aphids. On most occasions, the aphids do not attack the plants severely. Apple, pear, prunus, crab apple, pyracantha, cotoneaster, elm, hawthorn and mountain ash trees. Scale Insects are an occasional pest in home grown apple trees. Monitoring. The woolly aphid can be found on apple trees all year round, so the easiest treatment for these is a good spray of Lime Sulphur in the winter months on deciduous trees only once they have defoliated. This aphid has historically been considered an occasional apple pest in Ontario, but is now seen more frequently in orchards. That’s why the pesticide is normally unnecessary for their population control. They feed on leaves, buds, twigs, bark and roots causing twisted and curled leaves, yellowed foliage, poor plant growth, low plant vigor, and even dieback, particularly on already stressed trees. They attack roots, trunks, limbs, shoots and fruit. Woolly Aphids get their name from the waxy excretion they carry as a form of protection from predators. Mature trees usually suffer little damage from root infestations, but root infestations relative to young trees. Not to mention our car! Pruning and hail damage can create the wound sites for attack by this pest. The woolly aphid can be found on apple trees all year round, so the easiest treatment for these is a good spray of Lime Sulphur in the winter months on deciduous trees only once they have defoliated. Yuck. For the control of aphid population, efficacy of four insecticides viz. Damage. I read on several sites that the best thing to use was mentholated alcohol. WAA is a reddish brown aphid covered with a white wax mass produced by specialized dermal glands. Woolly aphid infestations and the damage they cause are unique on apple and are unlikely to be confused with other pests. 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