The larvae are currently in the 1st and 2nd instar stages and a little less than 1/8" long. Skeletonized oak leaves (Quercus) eaten by a slug sawfly larvae, such as, the scarlet oak sawfly or by a caterpillar, such as, an oak skeletonizer; both types of pest produce identical damage, eating the leaf tissue and leaving the veins Because there are many species, they thrive almost anywhere and affects a wide array of plants. that feed on oak foliage and we suspect that the species causing damage in Buchanan is the scarlet oak sawfly, Caliroa quercuscoccineae, although this has not been confirmed. First generation scarlet oak sawfly larvae are beginning to skeletonize oak leaves in southwest Ohio. The oak slug sawfly, also known as the scarlet oak sawfly, is a primitive wasp whose immature larval stage feeds on oak tree leaves. They are generally most common on pin oak, also occurring on black and scarlet oaks. I quickly focused on the slug or scarlet oak sawfly (Caliroa quercuscoccineae). Sawflies that feed on plants include the European pine sawfly, brownheaded ash sawfly, rose sawfly, and scarlet oak sawfly. Think about gypsy moth damage. Repeated defoliations may affect vigor or kill the tree. Slug oak sawfly (= Scarlet oak sawfly) Solitary oak leafminer Spider mites Spiny oakworm Spotworm borer Spring cankerworm Tilehorned prionus Twig pruner Walkingstick White grubs White oak borer Xyleborus spp. ] Details from Richard Orr: "This is one of slug sawflies which are wasps and not caterpillars. Leaves are alternate, simple, 3–7 inches long, with 7–9 lobes extending more than halfway to the central vein, the notches rounded and C-shaped, the lobe tips with large, bristle-tipped teeth. These are hard to control and one of the most common sawflies in oak trees, along with pear slug and rose slug. -- This pest skeletonizes leaves of red and white oaks. Sawfly’s Habitat You can find sawflies in the garden or in the wild. They may also dig tunnels or form pupal chambers throughout the oak. Look for larvae on foliage. Scarlet Oak Sawfly (Caliroa quercuscoccineae) Details Larvae feed on the bottom of oak leaves, leaving only a leaf skeleton of veins behind. SCARLET OAK SAWFLY Caliroa quercuscoccineae Importance. It is by Tim Tigner at Virginia Department of Forestry. They have more than 5 pairs of prolegs. Oak Sawfly Oak sawflies are being found on white oak. The slime helps them stick to the leaf that they’re feeding on. Scarlet oak sawfly The scarlet oak sawfly, also known as the oak slug sawfly, is capable of killing red and white oak trees by skeletonizing the tree’s leaves, feeding on the lower surface of the leaves, leaving only a fine network of veins which gives the leaf a transparent appearance. There was an epidemic of C. quercuscoccineae in AMES, Iowa – Horticulturists with Iowa State University tell us that several common sawflies found in Iowa are bothersome to gardeners: the azalea sawfly whose larvae feed on the leaves of azalea, the rose slug on roses, the scarlet oak sawfly that feeds on oak and the European pine sawfly.. Scarlet Oak Sawfly Pin oak is one of the preferred hosts of the scarlet oak sawfly (Caliroa quercuscoccineae). Larvae are present on the trees through much of the summer although evidence of feeding is most apparent in late summer. Scarlet Oak Sawfly, USDA Forest Service, Pest Alert NA-PR-06-98, 2. Light Scarlet oak's shade intolerance and relatively rapid growth rate (compared to other species on dry sites) allow for regeneration by clearcutting and seed-tree methods. Scarlet Oak Sawfly Damage is Underway First generation scarlet oak sawfly larvae are beginning to skeletonize oak leaves in southwest Ohio. Larvae are dark to light green and appear shiny and grow to approximately 13mm (1/2-inch). There are two ways to distinguish Scarlet Oak Sawflies on Black Oak in Howard Co., Maryland (9/16/2013). The scarlet oak sawfly larva is black to dark green and grows to a final length of approximately 1/2-inch. Caliroa quercuscoccineae, the scarlet oak sawfly or slug oak sawfly, is a species of sawfly in the family Tenthredinidae. However, major defoliation in consecutive years is a problem. Repeated defoliations retard growth, vigor, and … Scarlet oak sawflies Larvae superficially resemble true slugs; their body is largest just behind the head and tapers off toward the posterior. Except that Scarlet oak sawfly has two generations, one in early summer and one in late summer. They feed on the green, pulpy part of the leaves, leaving only leaf veins behind. First generation scarlet oak sawfly (Caliroa quercuscoccineae) larvae are beginning to skeletonize oak leaves in southwest Ohio. Scarlet oak has also been planted widely as a shade tree for its ability to withstand dry conditions and its reliable scarlet autumn color. Scarlet Oak Sawfly The BugLady got help on the ID (thanks, Gretchen, and for the two BIG books) and found out that these cool little guys are the larvae of the Scarlet Oak Sawfly ( Caliroa quercuscoccinae ; Quercus is the genus of oaks). Note that the feeding leaves the leaf with only the vein Scarlet Oak Sawfly Craig Greco, Yardbirds, Inc., found scarlet oak sawfly larvae feeding on oak on July 22. Oak slug sawfly The larvae of oak slug sawfly ( Caliroa quercuscoccineae ), sometimes called scarlet oak sawfly, are similar to caterpillars but look a bit like small slimy slugs. We couldn’t resist the temptation to provide an identification, so we did some searching and we believe these are the larvae of the Scarlet Oak Sawfly, Caliroa quercuscoccineae. Sawfly larvae resemble caterpillars; however, there is a difference. Image 0886013 is of scarlet oak sawfly (Caliroa quercuscoccineae ) larva(e). The larvae are currently in the 1st and 2nd instar stages and a little less than 1/8" long. Oak sawflies such as the pine sawfly will damage the leaves of scarlet, black, pin, and white oaks. The scarlet oak sawfly, Caliroa quercuscoccineae (Dyar) skeletonizes leaves of scarlet, black, pin, and white oaks in eastern North America. As larvae they are slug-like in appearance and even have a coating of slime to adhere to leaves. They feed on the underside of oak Despite this sawfly's common name, larvae may be found feeding on a wide range of oaks Similar scenario here. Like the scarlet oak sawfly larvae, my larvae were yellowish in color, had black true legs and face, and their feeding behavior was as described, they graze on the surface … Scarlet Oak Sawfly, USDA Forest Service Pest Alert NA-PR-06-98 2. 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