Although they grow naturally in moist, alluvial, bottomland soils, hackberries will do well in a wide variety of soil types. Hackberry (C. occidentalis) is a large native tree found commonly on river terraces and floodplains in southern and central Minnesota. It is the largest known tree of its species in … I have not been successful in figuring out exactly what shells they are referring to. Aphids are treatable with available insecticides. Hackberry psyllids cause ornamental damage to the tree, though infestations are not normally serious enough to warrant control. University of Minnesota Extension discovers science-based solutions, delivers practical education, and engages Minnesotans to build a better future. Extension is expanding its online education and resources to adapt to COVID-19 restrictions. The tree is tolerant of occasional flooding, but it is likely to decline and die if grown in an area with continuous flooding. Hackberry trees are relatively free from insect and disease problems. The wart-like growths are hackberry nipple galls. Hackberry is a Chicago-area native and a sturdy, tolerant shade tree for streets and parkways, or parks and other large areas. Common hackberry (Celtis occidentalis) goes by numerous names, including false elm, nettle tree and sugar berry. © Preventive insecticide treatments are seldom warranted. Celtis occidentalis, commonly known as the common hackberry, is a large deciduous tree native to North America. Most seeds are dispersed by animals, but some seeds are also dispersed by water. Hackberry nipple gall is probably the most common disease to infect hackberry trees. Hackberry psyllids are aphid-like jumping insects that are extremely common on hackberry trees. Figure 1. Witches’ broom (dwarfed, dense, contorted twig clusters at the branch ends) is also somewhat common. Hackberry Tree Pests and Problems Hackberry nipple gall is probably the most common disease to infect hackberry trees. Several fungi cause leaf spots on hackberry. Back Print results Print PDF (299 KB) Nipple gall and witches broom gall are the most common diseases affecting the tree. Diseases: Several fungi cause leaf spots on hackberry. The bark of hackberry provides year-round interest in landscapes. Hackberry Tree Pests and Problems. It can also be used as a specimen plant, in a tree border, or to naturalize an open space. Description of common hackberry: As a young tree, the hackberry is roughly pyramidal. As it tolerates soils that are light to heavy, wet to dry, Common Hackberry is an ideal street tree. The persistent fruits attract many birds that also find the tree to be a suitable nesting site. When your Chinese elm displays yellow leaves, you need to act quickly because this is a sign of two potentially severe disease problems. Hackberry Tree Pests and Problems Hackberry nipple gall is probably the most common disease to infect hackberry trees. Two insects are likely responsible for the symptoms on the hackberry tree. The one tree that was not included, even though it is a native, was the Common Hackberry. The Iroquois Indians used Hackberry decoctions to regulate a woman's menstrual cycle and cure venereal diseases. Hackberry psyllids are very common in hackberry trees and often cause a gall to form … Common Hackberry (Celtis occidentalis) General Description A medium-sized tree native to North Dakota. The University of Missouri suggests using a store-bought flying-insect insecticide in the spring to wipe out the pests. (A photo can be seen below) nipple gall on common hackberry NIPPLE GALL ON HACKBERRY The most common insect problem they face is not detrimental to the growth of the tree, hackberry psyllid. Hackberry psyllids are very common in hackberry trees and often cause a gall to form … The hackberry nipple gall is so common on hackberries that is used to identify the tree. – Hackberry, Deciduous tree; it drops its leaves in fall, Pyramidal shape in youth, spreading rounded shape in maturity, Bark of young trees appears covered with bumpy warts, but pattern changes to cork-like ridges as trees mature, ⅓ to ½ inch berry-like fruit called drupes that change from green to purple or reddish brown in autumn, Best soil properties for common hackberry, Sandy loams to clay soils, tolerates other, Soil pH 6.6 to 8.0, tolerates lower; Have your soil tested by the, Dry to wet soils and well-drained to poorly-drained soils, Transplants easily as a small bare root plant in spring or as a containerized or balled and burlapped plant throughout the growing season. 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