http://extension.psu.edu/plants/tree-fruit/insects-mites daily 1 2012-11-21T22:56:01Z http://extension.psu.edu/plants/tree-fruit/insects-mites/american-plum-borer American plum borer, Euzophera semifuneralis, has become a major indirect pest of tart cherries after widespread use of mechanical cherry harvesters causing shaker wounds that allow this pest to penetrate bark to feed on the underlying cambium. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/apple-grain-aphid Apple grain aphid, Rhopalosiphum fitchii, rarely causes damage to apples, but it is the first aphid to appear on apples in spring and may appear in large, but innocuous, numbers. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/apple-leafminer Apple leafminer, Lyonetia prunifoliella, has become fairly common in young, nonbearing trees since in the 1980s, but has not resulted in economic injury. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/apple-maggot Apple maggot, Rhagoletis pomonella, also known as the “railroad worm,” is abundant in untreated orchards and backyard trees. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/apple-rust-mite Apple rust mite, Aculus schlechtendali, is commonly found, but is rarely an important pest of apple in Pennsylvania. It is usually controlled by natural predators or pesticide sprays applied against other pests such as Envidor or Portal. However, rust mite populations can build to injurious levels in some situations. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/black-cherry-aphid The black cherry aphid, Myzus cerasi, is the most common aphid attacking cherries, primarily sweet cherries, in most parts of North America. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/buffalo-treehopper Buffalo treehopper, Stictocephala bisonia, is an occasional pest of fruit trees in Pennsylvania. It gets its name from its humpbacked resemblance to the shape of a buffalo. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/cherry-fruit-fly-and-black-cherry-fruit-fly Cherry fruit fly, Rhagoletis cingulata, and black cherry fruit fly, R. fausta, are found on cherry, pear, plum, and wild cherry trees. These insects are common in alternate hosts, but can be effectively managed in commercial orchards. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/codling-moth Codling moth, Cydia pomonella, was introduced from Europe in colonial times and now occurs throughout North America as well as most of the world, wherever apples are grown. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/dogwood-borer Dogwood borer, Synanthedon scitula, was found for the first time in the 1980s as a common pest in the burr knots of apple trees on clonal rootstocks in northern Virginia, Pennsylvania, and the rest of the Northeast. Untreated infestations may reduce yields and in rare cases girdle young trees. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/european-apple-sawfly Since 1985, European apple sawfly (Hoplocampa testudinea) has extended its range from the northeastern portion of Pennsylvania to the Maryland border. Now this pest is common throughout Pennsylvania. Injured fruit were first reported in Adams County during 1998. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/european-red-mite European red mite, Panonychus ulmi, a major tree fruit pest attacking apples, stone fruits, and pears, is considered by many growers throughout Pennsylvania to be one of the most important apple pests. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/green-aphids-apple-and-spirea-aphid Spirea aphid, Aphis spiraecola, has largely displaced the apple aphid, A. pomi, in apple since the mid-1980s. The spirea aphid has a broader host range and is more likely to immigrate into apple than apple aphid, which may stay on apple year round or immigrate later in the season. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/green-fruitworms The speckled green fruitworm, Orthosia hibisci, is the most common of several green fruitworm pests occurring in commercial orchards. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/green-peach-aphid The green peach aphid, Myzus persicae, is a common pest of peach and nectarine in Pennsylvania. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/gypsy-moth Gypsy moth, Lymantria dispar, may attack fruit trees, especially apple, causing defoliation that can stunt or kill young trees. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/japanese-beetle Japanese beetle, Popillia japonica, is one of the best-known pests to be encountered by Pennsylvania fruit growers, nursery operators, and gardeners. It is often the most important pest of tree-ripened peaches and can cause severe damage to other important crops. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/lesser-appleworm Lesser appleworm, Grapholita prunivora, is a common species, although infrequent as a pest in Pennsylvania orchards. Larvae are general fruit feeders attacking apples, pears, peaches, apricots, plums, and cherries. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/lesser-peachtree-borer Lesser peachtree borer, Synanthedon pictipes, is an important pest in peach and cherry orchards throughout Pennsylvania and surrounding states. Problems are almost always associated with widespread incidence of Cytospora canker and, to a much lesser extent, pruning wounds, winter injury, and mechanical damage. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/mullin-plant-bug Mullein plant bug, Campylomma verbasci, is a “two-edged sword” of the insect world. During one part of its life it is a beneficial insect feeding on pests such as aphids, thrips, and pear psylla, but in the early season when fruits are forming it feeds on flowers and developing fruitlets potentially causing serious direct damage to the crop. An increase in activity of this pest was noted in Pennsylvania in the early 1990s. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/obliquebanded-leafroller Obliquebanded leafroller, Choristoneura rosaceana, is native to and widely distributed throughout temperate North America. Larvae feed on a wide range of plants. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/oriental-fruit-moth Oriental fruit moth, Grapholita molesta, is a pest of most stone and pome fruits. In pome fruits, its appearance and injury is similar to that of the codling moth and lesser appleworm. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/peachtree-borer The peachtree borer, Synanthedon exitiosa, is primarily a pest of peach and nectarine trees, but it also attacks apricot, cherry, and plum. This native American borer has been known since colonial times and is a pest wherever peaches are grown. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/pear-blister-mite-and-pear-rust-mite Pearleaf blister mite, Phytoptus pyri, and pear rust mite, Epitrimerus pyri, are similar species, virtually invisible to the naked eye, that often are common on unsprayed trees. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page http://extension.psu.edu/plants/tree-fruit/insects-mites/pear-psylla Pear psylla, Cacopsylla pyricola, can be a limiting factor in pear production. It is a native species that produces abundant honeydew, which allows a sooty fungus to grow on the fruit surface. The result can be severe tree injury. No publisher Mary Wodecki 2010-01-15T20:15:00Z Page