Larvae emerge in mid-spring and the caterpillars feed for about 5-6 weeks. Forest tent caterpillars have one generation per year. Hosts of the Forest Tent Caterpillar include aspen, oak, birch, ash, maple, elm, basswood, water tupelo, sweetgum, red alder, willow, and cherry. Removal of tents and branches with tents. Large numbers of dark colored larvae are visible both on the tree and in the nest.A silky nest is visible in the crotches of branches.Stripping of the foliage in late spring and early Summer.The pupal stage lasts for about three weeks. Young larvae begin building their silken tents in a major branch fork or crotch for 6-8 weeks. Eggs hatch in the spring at about the same time as leaf emergence on cherry. The Eastern Tent Caterpillar attacks Prunus species such as cherry, plum, and peach, as well as flowering crabapple, hawthorn, and pear, maple, ash, birch, oak, willow, and poplar. Fungicides properly applied will be 95% effective for treating apple scab. Proper timing of the application is crucical. Fruit may also be infected by apple scab and display similar symptoms to those on leavesĪpplication of a fungicide in the spring as the leaves emerge.Heavily infected leaves may become yellow and fall off the tree from late Spring through late Summer.Spots become dark and velvety in appearance.Brown to olive, irregular-shaped spots on the leaves in late Spring.In late Summer or early Fall, primary apple scab infections produce secondary spores and create new infections. Wind and splashing rain carries apple scab spores from infected leaves to new growth on nearby trees where new infections begin. In spring, overwintered spores (ascospores) mature and are discharged over a period of 5 to 9 weeks. The apple scab pathogen overwinters in infected leaves on the ground from the previous year. Call, e-mail, or click contact us below if you'd like to request your FREE consultation.Ĭlick on any name below to read more about these damaging diseases.Ĭlick on any name below to read more about these damaging insects.Īffects all Malus species, including apple, fruit trees and flowering crabapples, and mountain ash. We are happy to provide a FREE consultation to answer any questions you may have as well as provide advice on when treatments are necessary. We have over 25 years experience and are well trained to recognize threatening insects and diseases. Periodic inspections are essential to detecting pest infestations before they reach damaging levels. encourages a proactive approach to managing insect and diseases which begins with maintaining tree health using sound cultural practices including pruning and creating optimal soil conditions for tree growth.
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