The first symptoms are birch leaves with distorted corrugations or bumpy ridges. There is also a spiny leaf gall aphid (Hamamelistes spinosus), that can cause some unsightly spiny galls on the foliage. The spiny Witch-Hazel gall aphid causes galls 3/4-inch-long with long, coarse spines. #gardening #aphids #trees If you ever wondered what was inside a cone gall, or the red spikes on your Witch Hazel here it is. 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.  These strange, spiny galls are caused by the Spiny Witch Hazel Bud Gall Aphid, Hamamelistes spinosus All year long the spiny galls remind me of the aphid’s amazing and complex two-year life-cycle which involves living on birch leaves part of the time and some of the time on Witch Hazel. It starts as a green and fleshy projection that hardens into a brown, spiky object by winter. Interesting that the spiny galls run larger than the plant’s actual fruit capsules. The spiny witch-hazel gall aphid causes galls 3/4 inch long with long, coarse spines. Eastern tent caterpillar feeds on witch-hazel leaves. There may be several generations a year, and lar-vae may be found from spring until fall. However, control is not usually warranted because healthy trees produce a new crop of The mother aphid actually caused the plant to form the gall around her and now she is inside, protected, feeding and reproducing. Injury from this aphid ranges from premature leaf drop to dead twigs and branches. and birch (Betula spp.) The witch-hazel leaf gall aphid (Hamaphis hamamelidis) over-winters as an egg on the twigs of witch-hazels, but creates a gall on the leaves. Ant near the fruit, and that could be a winged-form aphid on the gall. Poplar twiggall aphid Poplar vagabond aphid Spiny witch-hazel gall aphid Sugarbeet root aphid Witch-hazel leaf gall aphid. This plant also produces Spiny Witch-hazel Galls. Branches may be stripped of foliage and small trees may be defoliated. x Copy guide taxon to... You can copy this taxon into another guide. Spiny witch hazel gall aphid (Hamamelistes spinosus) This aphid is a common pest on birch, particularly river birch. Both this aphid and the previous one migrate to birch for part of their life cycle. Leafspot on birch … 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. Photo by Jim Brighton. When spiny witch-hazel gall aphids feed on river birch leaves, the leaves to become crinkled and discolored, with pink corrugated ridges. On the underside of … Witch-hazel Cone Gall Aphids Laying Eggs. Spiny Witch Hazel Gall Aphid Photographed along the Ouachita National Trail, Ouachita National Forest, Perry County, Arkansas Hamamelistes spinosus is a species of insects with 137 observations The galls are green tinged with red. The aphids feed on the glucose present in the gall. The galls are green tinged with red. Spiny Witch Hazel Gall Aphid in Carroll Co., Maryland (8/17/2014). Questions tagged with 'spiney witchhazel gall aphid' River Birch Diseases. Spiny Witch-hazel Gall Aphid Hamamelistes spinosus feeding along the edges of leaves. Witch-hazel cone gall aphid 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 red conical gall structure. The aphids feed on the glucose present in the gall. This gall, rich in nutrients, provides both food and shelter for the female aphid. Spray with dormant oil before the plants begin to grow in the spring. 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