![]() ![]() If you notice any of these, you will know there are woolly aphid pests around.Ĭ) Clusters of wool-like substances on plants Hence, make sure you notice such growths. You may notice the growth of galls and cankers on your plants because of woolly aphids. Hence you may notice a sudden rise in them which can be a sign that woolly aphids are attacking your plants. Honeydew attracts other insect pests too. If you notice sticky residue on your trees and leaves, then you can know it is them! Just like the other aphid species, they also leave honeydew behind. The higher the aphids attack and suck sap, the more the leaves will turn yellow and twist. They lead to undernourishment of the plants, and hence you see discoloration of leaves. While sucking saps from the plants, the aphids take the nutrients too. There are a number of signs which reveal that woolly aphids are attacking your plants. Though it doesn’t damage the plant on its own, eliminating aphids and honeydew will help you in preventing sooty mold. You can see wax accumulation along with sticky residue called honeydew.Īlso, you may notice some plants covered with perennial canker and sooty mold – usually a black fungus which looks like soot. Woolly aphids usually feed on plant sap in groups.Įspecially they love feeding on apple and olive trees but can also be seen eating buds, bark, twigs, foliage, or roots.ĭamage can be noticed by the curled or twitched leaves, yellow color of foliage, undergrowth of plants, growth of cankers and galls on roots or limbs, and branch dieback. ![]() Generally, these insect pests need two hosts: first for overwintering and laying eggs during spring and second for feeding during summer. This covering on their body looks much like cotton or wool. Though they are usually blue or green in color, they may look fuzzy because of the white, sticky material which covers their body. Just like the other kinds of aphids, woolly aphids are sap-sucking pests from the insect family. How to Get Rid of Aphids On Petunias And Roses?.How to Eliminate Woolly Aphids on Trees?.Literature: Johnson & Lyon 1988 Metcalf et al. Pest Status: Occurs on apples with susceptible rootstock or susceptible varieties medically harmless.įor additional information, contact your local Texas A&M AgriLife Extension Service agent or search for other state Extension offices. Waxy masses can be preserved by freezing infested leaf specimens and storing them dry in a vial or small box. Aphids can be preserved in alcohol, although the waxy masses will dissolve. Woolly apple aphids have become a problem in areas of Texas where dwarf apple varieties have been planted using susceptible root stock. Rootstock of all but a few apple varieties is susceptible to attack. Heavily infested trees become stunted and may die. Underground, aphids cause large knots on roots on apple trees. Habitat and Food Source(s): Aphids become noticeable because of the woolly wax masses on wounds of the trunk and branches on apple, elm, hawthorn, mountain ash, pear and quince. Wingless males are produced in the fall and mate with wingless females, each of which lay a single overwintering egg. ![]() In summertime, females give birth to live young (parthenogenesis). There, they feed on wounds on trunks and branches and move to the root zone. Wingless nymphs feed on new growth and twigs for two generations (May and June), producing winged forms that fly to other host plants (apple, hawthorn and mountain ash). Eggs are laid in bark cracks on elm in the fall and hatch in early spring. Winter is spent in the egg or young nymphal stages underground in root galls, and as adult egg-laying females on the branches and trunks of host plants. Life Cycle: Simple metamorphosis parthenogenic. Masses of woolly aphids infest the undersides of leaves on terminal growth, causing leaves to turn pale green and curl. At certain times during the summer, infestations can become noticeable on host plants such as Arizona ash in central Texas. Several other aphid species ( Paraprociphilus spp., Eriosoma spp., Stegophylla spp.) produce large quantities of woolly wax filaments and infest leaves of alders, elms and oaks. Scientific Name: Eriosoma lanigerum (Hausmann)ĭescription: Aphids are reddish-purplish, wingless or winged and covered with woolly, bluish-white wax masses. Wooly apple aphid, Eriosoma lanigerum (Hausmann) (Homoptera: Aphididae), damage to apple roots. ![]()
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