European and redheaded pine sawflies: Scotch, red, Mugo, Jack, and Austrian pines 2. Spot treat when possible as European pine sawflies commonly feed in groups. These are hard to control and one of the most common sawflies in oak trees, along with pear slug and rose slug. Their sides are yellow and white and their heads are shiny black. Younger larvae eat the outer edges of pine needles leaving behind the central tissue which wilts and dies to creating the appearance of dried straw, making sawfly damage distinctive. If an insecticide is applied, it is best done when larvae are hatching or very small to minimize damage. The adult pear sawfly is shiny black with dark wings; the larva is described above. Damage first appears as browning of the needles and gradually the branches will become stripped of needles. Sawfly Damage. Adults of blackheaded pine sawfly (Neodiprion excitans).Egg of a conifer sawfly (Neodiprion sp.) Conifer sawflies, for instance, are found in coniferous trees, such as pine and spruce. Adult pine sawfly (Diprion pini) are 10mm long brown winged insects, The larvae reach up to 25mm long and are pale green in colour with a brown head and black markings. Bt (Bacillus thuringiensis), which is an effective natural control for true caterpillars, is ineffective on sawfly larvae. in the needle of a white fir (Abies concolor).Larvae of redheaded pine sawfly (Neodiprion lecontei).Typical "straw"-like feeding damage done by redheaded pine sawfly (Neodiprion lecontei).Photo credit: Gerald J. Lenhard, Louisiana State University, Bugwood.org It does very little damage to plants. in the needle of a white fir (Abies concolor).Larvae of redheaded pine sawfly (Neodiprion lecontei).Typical "straw"-like feeding damage done by redheaded pine sawfly (Neodiprion lecontei).Photo credit: Gerald J. Lenhard, Louisiana State University, Bugwood.org Older larvae eat the entire needle, and if complete defoliation occurs, groups of larvae will move to the nearest acceptable food source and continue feeding. The larvae of Exhyalanthrax afer feed on N. sertifer cocoons. The European pine sawfly, Neodiprion sertifer (Geoffroy), is the most common sawfly found infesting pines in landscapes, ornamental nurseries and Christmas tree plantations.Sawfly larvae look like caterpillars but they are the larvae of primitive wasp-like insects. They may also dig tunnels or form pupal chambers throughout the oak. The adult sawfly is less than one-half inch long, resembling a small bee or wasp. Introduced pine sawfly: eastern white pine Conventional insecticides such as malathion are also effective. Usually, pine sawfly larvae are found on young trees that are between 1-14 feet tall. Damage/Symptoms. Oak sawflies such as the pine sawfly will damage the leaves of scarlet, black, pin, and white oaks. The larvae feed for weeks on the foliage of conifers, except cedar, hemlock, and juniper. Most damage occurs during the caterpillar-like stage of development. Identifying Sawfly’s Damage Plants Affected. If you live in this area, consider letting a professional arborist take a look at your trees and determine the best treatment. Oak sawflies such as the pine sawfly will damage the leaves of scarlet, black, pin, and white oaks. Pine sawfly larvae, Neodiprion spp., are the most common defoliating insects of pine trees, Pinus spp., in Florida. The larvae reach 25mm in length are a dirty green colour with a black lateral stripe and a black head. However, redheaded and white pine sawflies can kill branches or the entire tree if numerous. White Pine Sawfly (E. Bradford Walker, Vermont Department of Forests, Parks and Recreation, Bugwood.org) Loblolly Pine Sawfly. Neodiprion sertifer, the European pine sawfly or red pine sawfly, is a sawfly species in the genus Neodiprion.Although native to Europe, it was accidentally introduced to North America in 1925. A few examples are the pear sawfly and the bristly rose slug. They may also dig tunnels or form pupal chambers throughout the oak. Oak sawflies are yellow and green and most often found on pin oak. Some skeletonize or chew holes in leaves; others mine tissue. Note that all of the old needles are gone and only the new growth remains. Oak sawflies are yellow and green and most often found on pin oak. Broadleaf sawfly species cause more variable damage. It attacks trees of all sizes, but can especially be a problem on nursery and plantation trees. Damage . The loblolly pine sawfly, a long time pest in Arkansas, has attacked loblolly pines in western Kentucky during some years. The European pine sawfly commonly attacks Mugo pines in the landscape, but will also feed on Japanese, Scotch, and other pines. Sawfly infestations can cause growth loss and mortality, especially when followed by secondary attack by bark and wood-boring beetles (Coleoptera: Buprestidae, Cerambycidae, Scolytidae,). They are common from southwestern Ontario through New England and west to Iowa. The European Pine Sawfly is a nuisance for pine trees but an alert caretaker can catch and prevent an infestation long before the eggs even start hatching in SE Wisconsin. The best time to control sawflies is early in their larval stage. Fox-coloured sawfly (Neodiprion sertifer) is 7-9mm long and pale orange-brown. Severe European pine sawfly damage. Sawfly damage is caused by the larvae that feed on the plants in several different ways, depending on the species. Management: Look for sawfly larvae in the spring and if necessary use a pesticide to treat them. Failure to control the European Pine Sawfly insect is not usually fatal to the plant. These are hard to control and one of the most common sawflies in oak trees, along with pear slug and rose slug.