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April 12, 2019

Fig. One of the most common species found in landscapes is the woolly apple aphid (see photo above). All types of aphids pierce the plant at its leaves and stems. Mimeuria - Gootiella - The life cycle involves two hosts. Forda - Woolly aphids and other sucking insects are often vectors of transmission for powdery mildew (a white fungus which grows on above ground parts of some plants), and other infectious diseases. Some species can produce galls as well. Smynthurodes - Siciunguis - Apple, pear, prunus, crab apple, pyracantha, cotoneaster, elm, hawthorn and mountain ash trees. Mordwilkoja - Schizoneurata - The eastern and Carolina hemlock is now under attack and in the early stages of being decimated by the hemlock wooly adelgid (HWA) or Adelges tsugae . Clydesmithia - Woolly oak aphids are conspicuous pests on oak (Quercus spp. Colonies form at wound sites on trunks, limbs, and twigs, where they feed on tender bark. Asiphonella - The woolly mass will often be seen on the spurs or branches that have been pruned as well as within cracks in the bark. Indian Journal of Entomology, 49(4):559-561. Woolly aphids generally are not much cause for alarm, although they can cause rather unsightly damage to plants, which is particularly a problem for growers of ornamental plants. REC, Western Maryland Further minor damage can be caused by the honeydew that woolly aphids secrete, which is difficult to remove. Patchiella - Egg-laying wounds by the periodical cicada are ideal sites for infestation. HWA are very small (1.5 mm) and often hard to see, but they can be easily identified by the white woolly masses they form on the underside of branches at the base of the needles. Woolly aphids are easily recognized by the mass of white woolly wax that they produce. They can be seen feeding on foliage, buds, twigs and branches, bark, and even the roots. Woolly alder aphid                                      Woolly aphids on hawthorn. Grylloprociphilus - Plants affected. Woolly aphids are aphids that produce a covering of fluffy white wax. Wingless females of woolly apple aphids live in dense colonies on the roots, trunk or branches of the (secondary) host apple (Malus) where it is a serious pest, often causing deformation and cancer-like swellings of bark. As of 2011, eighteen states from Maine to Georgia have HWA. Geoica - They are able to feed on leaves, buds, bark, and even the roots of the plant. While the honeydew itself doesn't cause too much of a problem, the honeydew can cause sooty mold to grow, which can block some of the sunlight needed for photosynthesis. One of the most common species found in landscapes is the woolly apple aphid (see photo above). Woolly aphid insects generally feed in groups. woolly apple aphid, Eriosoma lanigerum) and then later on migrate upward from the soil to feed on plant stems and branches. Eriosoma lanigerum is also found on related species, such as hawthorn (Crataegus) and Cotoneaster. Hemlock Woolly Adelgid (Uh-dell-jid) (HWA) is an introduced, aphid-like insect from Asia that attacks eastern hemlock. The branch form can be kept in check by occasionally spray-ing with kerosene emulsion, one part to eight of water, or resinwash. Infestation of Scots Pine by this species causes premature needle shedding and reduction in the length of infested needles. Nurudea - They have been known to cause botanical damage and are often considered a pest. Aphids, also known as greenfly and blackfly, are sap-sucking insects. Schizoneurella - Pemphigus - Symptoms caused by their feeding on a plant include twisted and curled leaves, yellowed foliage, poor plant growth, low plant vigor, and branch dieback. Identification of species. Some species feed in groups and cause swellings on bark or roots. Prociphilus - Adults are approximately 2 mm in length and are pinkish brown in color. The \"wool\" is most conspicuous on the undersides of branches from fall through spring. Damage: Woolly aphid infestations cause galls to form. Chaetogeoica - Colopha - Aphid forms inhabiting above-ground parts of the apple tree are most common in mid-summer and fall. Woolly aphids feed by inserting their needle-like mouthparts into plant tissue to withdraw sap. Aphids come in a variety of species. Paracolopha - Injury caused by the woolly apple aphid consists of gall-like formations and swollen enlargements on roots and shoots. Woolly aphids (subfamily: Eriosomatinae) are sucking insects that live on plant sap and produce a filamentous waxy white covering which resembles cotton or wool. 42 (6), 90-2. Maturing rapidly, females breed profusely so that the number of th… Galls … They are brown or greyish-purple in colour, although this is usually masked by the wax. Kaburagia - Woolly aphids on hawthorn and crabapples feed on sap from the plant but are more alarming than damaging, especially late in the season. Pachypappa - Ceratopemphigus - The nymphs often form large cottony masses on twigs, for protection from predators. On elm, two common aphid species may cause trouble. REC, Dogwood Insect Pests: Identification and Management, Flowering Dogwood Trees: Selection, Care, and Management of Disease Problems, Why Are Leyland Cypress Trees Turning Brown, Azaleas and Rhododendrons: Common Diseases and Abiotic Problems, Boxwood: Preventing and Managing Common Pests and Diseases, Diagnosing Problems of Azaleas and Rhododendrons, Ornamental Fruit Trees: Preventing, Diagnosing, and Managing Problems. Formosaphis - Aphid infestations are often localized and different aphid species prefer different parts of the plant, so you should check the entire plant rather than just the terminals. Many species of aphids are cryptically colored green and can blend in among the twigs and leaves of their host plants. The wax filaments make these aphids look fluffy and cottony, as if they are covered with wool. Thecabius - It prefers to suck the sap from roots, branches and twigs of apple, but may also be found on alder, elm, mountain ash, hawthorn, serviceberry, and Pyracantha. Many of the numerous species of woolly aphids have only one host plant species, or alternating generations on two specific hosts. Aploneura - Adult aphids are up to 2mm long and elliptical in shape. , Diphyllaphis microtrema Quednau, is a conspicuous white color due to waxy secretions from its exoskeleton but in length. '' is most conspicuous on the above-ground portions or roots of the apple tree Entomology, 49 ( 4:559-561. A source for spreading aphids of Scots Pine by this pest two common species! 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