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.” 28-84. The host plant is witchhazel (Hamamelis virginiana). Interesting that the spiny galls run larger than the plant’s actual fruit capsules. 10-27. 5. Aphid. Fig. ).Aphid feeding causes the leaves to thicken and form bright red galls. They alternate between witch-hazel (Hamamelis spp.) and birch (Betula spp.) This gall, rich in nutrients, provides both food and shelter for the female aphid. Its feeding causes the characteristic gall to form. The manzanita leafgall aphid feeds on the leaves of kinnikinnick and other manzanita species (Arctostaphylos spp. Both this aphid and the previous one migrate to birch for part of their life cycle. Each year, this Aphid goes through seven generations between spring and fall and only a couple are actually found on Witch Hazel. Research Publications on UNL Digital Commons; The dusky birch sawfly feeds on various species of birch, but prefers gray birch. 2-3. Ant near the fruit, and that could be a winged-form aphid on the gall. The SpWHG gallmaker is an aphid that divides its life cycle between witch hazel and river birch. It has a complicated life cycle in that it alternates between two hosts: birch (Betula) and witch hazel (Hamamelis spp.) 103 Entomology Hall Lincoln, NE 68583-0816. The gall, which is pale green, is unsightly but rarely a serious threat to the health of the plant. The aphid produces raised ribs or "corrugations" on the upper leaf surface that match deep furrows between the … The aphid, through saliva injects a chemical into the plant that forms the narrow cone-shaped gall. 402-472-2123. View All Images. There are a couple of insects associated with the witch hazel, but none are serious. My river birch has an aphid and after doing some research, it is apparently Spiny Witch-hazel Gall Aphids. Size: length 1 cm., diameter 5 mm,. 4. Spiny Witch Hazel Gall Aphid in Carroll Co., Maryland (8/17/2014). The galls are green tinged with red. The aphids are found on the undersides of the leaves, caked into the corrugations with a white granular material. Related Links. The spiny Witch-Hazel gall aphid causes galls 3/4-inch-long with long, coarse spines. Eastern tent caterpillar feeds on Witch-Hazel leaves. Figure 3. Removing the nest by tearing out the web It starts as a green and fleshy projection that hardens into a brown, spiky object by winter. Pest description and damage These aphids are grayish or greenish and prefer to feed on new plant growth. This plant also produces Spiny Witch-hazel Galls. These aphids are found on the underside of the leaf, which is … Eastern tent caterpillar feeds on Witch-Hazel leaves. Photo by Andy Gougherty. An aphid crawls into a leaf bud and secretes an enzyme. This aphid is a common pest on birch, particularly river birch. The aphid reproduces within the gall and the gall provides a food source for the young. The irritation causes the plant to produce the gall around the aphid. Hormaphis hamamelidis, the aphid that causes witch-hazel cone gall Control is generally not suggested. These conical galls occur singly or in groups on the upper leaf Leafspot on birch The full … Hamamelistes spinosus is a species of insects with 137 observations Spray with dormant oil before the plants begin to grow in the spring. 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 … 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. Woolly Birch Aphid; June 22, 2005: Woolly aphids are being found on river birch in northern Illinois. An aphid crawls into a leaf bud and secretes an enzyme. 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. There is a cone gall aphid (Hormaphis hamamelidis) that can cause unsightly galls on the leaves, but are usually not a significant problem. Spiny Witch-hazel Gall. Kingdom Animalia > Phylum Arthropoda > Class Insecta > Order Hemiptera > Family Aphididae > Genus Hamamelistes [Go to Species Page] Legend. The aphids become active in the spring when the leaf buds are opening. At this time of year, the gall looks woody. Includes manzanita leaf gall aphid (Tamalia coweni). Spines tapering, length 3 mm. 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. Spiny Witch Hazel Gall Aphid Photographed along the Ouachita National Trail, Ouachita National Forest, Perry County, Arkansas 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. It is "Systemic Insect Killer" by Ortho. Spiny witch-hazel gall aphids have an interesting life cycle. Hormnaphis hamamaelidis (Fitch) Aphid. Spiny Witch Hazel Galls. 4-9. 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 … Eastern tent caterpillar feeds on witch-hazel … This is not a disease but is caused by an insect called spiny witch hazel gall aphid. Found in buds, the Spiny witch-hazel leaf gall houses developing aphids inside of it. The galls are green tinged with red. Use of images featured on Maryland Biodiversity Project is only permitted with express permission of the photographer. Spiny Witch-hazel Gall Aphid Hamamelistes spinosus feeding along the edges of leaves. The spiny Witch-Hazel gall aphid causes galls 3/4-inch-long with long, coarse spines. Color: green, turning brown. Horned gall aphid (Hormaphis hamamelidis) is a rather ugly blemish attacking the leaves and stems of the Witch Hazel. Witch Hazel Conie Gall. There are many different types, usually host-specific, with various shapes and sizes of galls formed. The specific type of aphid that feeds on river birch foliage is known as the spiny witch-hazel gall aphid. Galls can be caused by feeding or egg-laying of insects and mites. Both this aphid and the previous one migrate to birch for part of their life cycle. Spiny Witch Hazel Gall Aphid Hamamelistes spinosus Shimer, 1867 . There is also a spiny leaf gall aphid (Hamamelistes spinosus), that can cause some unsightly spiny galls on the foliage. While these galls can be numerous, they are not really harming the plant. Spiny Witch Hazel Gall, created by another aphid (Hamamelistes spinosus). I took a leaf to the nursery where I bought the tree and they sold me an insecticide to spray on it. Aphid feeding on river birches causes the leaves to take on a reddish coloration. 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