Galls are abnormal plant growths caused by insects, mites, nematodes, fungi, bacteria and viruses. There is also a spiny leaf gall aphid (Hamamelistes spinosus), that can cause some unsightly spiny galls on the foliage. Photo by Andy Gougherty. Aphid. Poplar twiggall aphid Poplar vagabond aphid Spiny witch-hazel gall aphid Sugarbeet root aphid Witch-hazel leaf gall aphid. The SpWHG gallmaker is an aphid that divides its life cycle between witch hazel and river birch. The galls are green tinged with red. The galls are green tinged with red. 402-472-2123. Spiny Witch-hazel Gall Aphid Hamamelistes spinosus feeding along the edges of leaves. Figure 3. These conical galls occur singly or in groups on the upper leaf Fig. The aphid reproduces within the gall and the gall provides a food source for the young. The aphid produces raised ribs or "corrugations" on the upper leaf surface that match deep furrows between the … Spiny Witch Hazel Gall Aphid in Carroll Co., Maryland (8/17/2014). Woolly Birch Aphid; June 22, 2005: Woolly aphids are being found on river birch in northern Illinois. Spiny Witch-hazel Gall. It starts as a green and fleshy projection that hardens into a brown, spiky object by winter. The irritation causes the plant to produce the gall around the aphid. The spiny Witch-Hazel gall aphid causes galls 3/4-inch-long with long, coarse spines. Each year, this Aphid goes through seven generations between spring and fall and only a couple are actually found on Witch Hazel. x Copy guide taxon to... You can copy this taxon into another guide. Spiny Witch Hazel Gall, created by another aphid (Hamamelistes spinosus). Both this aphid and the previous one migrate to birch for part of their life cycle. Eastern tent caterpillar feeds on witch-hazel … The aphid, through saliva injects a chemical into the plant that forms the narrow cone-shaped gall. Both this aphid and the previous one migrate to birch for part of their life cycle. Eastern tent caterpillar feeds on Witch-Hazel leaves. Hamamelistes spinosus is a species of insects with 137 observations MD aphids river birch tree pest insects and mites spiney witchhazel gall aphid honeydew from aphids birch dripping clear substance river birch dripping spiny witch hazel gall aphid … The unusual leaf distortion damage caused by the spiny witchhazel gall aphid (Hamamelistes spinosus) is now appearing on river birch in southwest Ohio. The specific type of aphid that feeds on river birch foliage is known as the spiny witch-hazel gall aphid. Aphids are responsible for the formation of two different galls (abnormal plant growths caused by insects, fungi, bacteria and viruses) on Witch Hazel (Hamamelis virginiana).A cone-shaped gall forms on leaves and a second type of gall covered with spiny … The spiny Witch-Hazel gall aphid causes galls 3/4-inch-long with long, coarse spines. This plant also produces Spiny Witch-hazel Galls. This aphid is a common pest on birch, particularly river birch. 1. An aphid crawls into a leaf bud and secretes an enzyme. The eggs are laid on witch hazel, and when it hatches, the aphid goes looking for a flower bud to invade. Photo by Jim Brighton. If you are one of the editors of this guide it should copy everything, but if you're not, it will only copy the licensed content. Color: green, turning brown. The aphids are found on the undersides of the leaves, caked into the corrugations with a white granular material. Spray with horticultural oil for some control. The manzanita leafgall aphid feeds on the leaves of kinnikinnick and other manzanita species (Arctostaphylos spp. 402-472-4687. entwebpage@unl.edu. Spray with horticultural oil for some control. Related Links. Galls can be caused by feeding or egg-laying of insects and mites. 28-84. Both this aphid and the previous one migrate to birch for part of their life cycle. Foliage. There is a cone gall aphid (Hormaphis hamamelidis) that can cause unsightly galls on the leaves, but are usually not a significant problem. These aphids are found on the underside of the leaf, which is … Spray with horticultural oil for some control. Pest description and damage These aphids are grayish or greenish and prefer to feed on new plant growth. Includes manzanita leaf gall aphid (Tamalia coweni). It is "Systemic Insect Killer" by Ortho. Although there is no accepted common name for Hamamelistes spinosus, it could be called the spiny witch-hazel gall aphid or woolly birch aphid for its appearance on the hosts that it attacks.. On birch, this insect overwinters on the bark as a hibernating female, sometimes called a “pupa.” 103 Entomology Hall Lincoln, NE 68583-0816. This plant also produces Spiny Witch-hazel Galls. Interesting that the spiny galls run larger than the plant’s actual fruit capsules. Aphid feeding on river birches causes the leaves to take on a reddish coloration. The photo below is of Witch-hazel cone gall, caused by an aphid bearing the same name. Spray with dormant oil before the plants begin to grow in the spring. Size: length 1 cm., diameter 5 mm,. Research Publications on UNL Digital Commons; View All Images. 2-3. Spiny Witch Hazel Galls. Spiny Witch Hazel Gall Aphid Photographed along the Ouachita National Trail, Ouachita National Forest, Perry County, Arkansas Use of images featured on Maryland Biodiversity Project is only permitted with express permission of the photographer. At this time of year, the gall looks woody. Spiny Witch Hazel Gall Aphid Hamamelistes spinosus Shimer, 1867 . These aphids can also be found on birch, where they are known as the River birch aphid.Aphids from birch trees migrate to witch-hazel to create the next generation of aphids that will emerge the next spring. ).Aphid feeding causes the leaves to thicken and form bright red galls. The aphid reproduces within the gall and the gall provides a food source for the young. Aphids are responsible for the formation of two different galls (abnormal plant growths caused by insects, fungi, bacteria and viruses) on Witch Hazel (Hamamelis virginiana).A cone-shaped gall forms on leaves and a second type of gall covered with spiny points grows from branches. trees. The spiny witch-hazel bud gall aphid (Hamamelistes spinosus) is named for the appearance of the gall the plant produces from bud tissue in response to being used as a home by the developing aphids. Insect galls rarely affect plant health and their numbers vary from season to season. Control is generally not suggested. The spiny witch hazel gall (SpWHG), causes a spiky ¾” oval growth on a stem. Spines tapering, length 3 mm. Removing the nest by tearing out the web 4-9. The aphids become active in the spring when the leaf buds are opening. The 1st generation, also known as “the gall makers” or “the stem mothers”, are all-female and hatch from “winter eggs” on witch-hazel branches. They alternate between witch-hazel (Hamamelis spp.) I find insects that cause galls to be really interesting. Ant near the fruit, and that could be a winged-form aphid on the gall. The galls are caused by the Witch Hazel Cone Gall Aphid (Hormaphis hamamelidis). Branches may be stripped of foliage and small trees may be defoliated. An aphid crawls into a leaf bud and secretes an enzyme. Spiny witch-hazel gall aphids have an interesting life cycle. These hollow, spiny, deformed bud galls occur singly or in clus-ters on witch hazel, Hamamelis vir ini'ana. Hormaphis hamamelidis, the aphid that causes witch-hazel cone gall In late summer, the whitefly-like aphids give birth to nymphs that develop wings. Found in buds, the Spiny witch-hazel leaf gall houses developing aphids inside of it. The gall, which is pale green, is unsightly but rarely a serious threat to the health of the plant. The witch-hazel cone gall aphid (Hormaphis hamamelidis) is a minuscule insect, a member of the aphid superfamily, whose presence on a witch-hazel plant is easily recognizable by a conical gall structure, green at first, it turns bright red. The spiny witch-hazel gall aphid causes galls 3/4 inch long with long, coarse spines. The galls are green tinged with red. Its feeding causes the characteristic gall to form. The dusky birch sawfly feeds on various species of birch, but prefers gray birch. Contact Us. Horned gall aphid (Hormaphis hamamelidis) is a rather ugly blemish attacking the leaves and stems of the Witch Hazel. 5. Hormnaphis hamamaelidis (Fitch) Aphid. While these galls can be numerous, they are not really harming the plant. The galls are green tinged with red. In the spring, this aphid feeds on river birch leaves. Witch Hazel Cone Gall, created by a aphid (Hormaphis hamamelidis). 4. The mother aphid actually caused the plant to form the gall around her and now she is inside, protected, feeding and reproducing. Dear Gene: River birches can be attacked by an insect known as the spiny witch hazel gall aphid. Kingdom Animalia > Phylum Arthropoda > Class Insecta > Order Hemiptera > Family Aphididae > Genus Hamamelistes [Go to Species Page] Legend. I took a leaf to the nursery where I bought the tree and they sold me an insecticide to spray on it. It has a complicated life cycle in that it alternates between two hosts: birch (Betula) and witch hazel (Hamamelis spp.) The host plant is witchhazel (Hamamelis virginiana). 10-27. A Spiny Witch Hazel Gall Aphid in Allegany Co., Maryland (5/14/2015). Eastern tent caterpillar feeds on Witch-Hazel leaves. My river birch has an aphid and after doing some research, it is apparently Spiny Witch-hazel Gall Aphids. Galls on Witch-Hazel Leaves The witch-hazel leaf gall aphid, Hormaphis hamamelidis, is most often noticed as the aleurodiform (whitefly form) on birch leaves in late summer or fall. Witch Hazel Conie Gall. This gall, rich in nutrients, provides both food and shelter for the female aphid. Both this aphid and the previous one migrate to birch for part of their life cycle. The irritation causes the plant to produce the gall around the aphid. Leafspot on birch The full … Spiny Witch Hazel Galls. This is not a disease but is caused by an insect called spiny witch hazel gall aphid. There are a couple of insects associated with the witch hazel, but none are serious. The spiny Witch-Hazel gall aphid causes galls 3/4-inch-long with long, coarse spines. 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