The larvae are currently in the 1st and 2nd instar stages and a little less than 1/8" long. Look for larvae on foliage. Oak sawflies such as the pine sawfly will damage the leaves of scarlet, black, pin, and white oaks. Caliroa quercuscoccineae, the scarlet oak sawfly or slug oak sawfly, is a species of sawfly in the family Tenthredinidae. -- This pest skeletonizes leaves of red and white oaks. They feed on the underside of oak Sawfly’s Habitat You can find sawflies in the garden or in the wild. Scarlet Oak Sawflies on Black Oak in Howard Co., Maryland (9/16/2013). Except that Scarlet oak sawfly has two generations, one in early summer and one in late summer. Scarlet oak has also been planted widely as a shade tree for its ability to withstand dry conditions and its reliable scarlet autumn color. 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. 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.. As larvae they are slug-like in appearance and even have a coating of slime to adhere to leaves. Scarlet Oak Sawfly, USDA Forest Service, Pest Alert NA-PR-06-98, 2. 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 slug sawfly, also known as the scarlet oak sawfly, feeds on scarlet, pin, black and white oaks. The adults are black and 3/8 inch long. I quickly focused on the slug or scarlet oak sawfly (Caliroa quercuscoccineae). They are generally most common on pin oak, also occurring on black and scarlet oaks. Scarlet Oak Sawfly Damage is Underway First generation scarlet oak sawfly larvae are beginning to skeletonize oak leaves in southwest Ohio. Scarlet oak sawflies Larvae superficially resemble true slugs; their body is largest just behind the head and tapers off toward the posterior. There was an epidemic of C. quercuscoccineae in 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. The scarlet oak sawfly larva is black to dark green and grows to a final length of approximately 1/2-inch. Sawflies that feed on plants include the European pine sawfly, brownheaded ash sawfly, rose sawfly, and scarlet oak sawfly. Scarlet Oak Sawfly (Caliroa quercuscoccineae) Details Larvae feed on the bottom of oak leaves, leaving only a leaf skeleton of veins behind. Repeated defoliations retard growth, vigor, and … 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. Scarlet Oak Sawfly Pin oak is one of the preferred hosts of the scarlet oak sawfly (Caliroa quercuscoccineae). They may also dig tunnels or form pupal chambers throughout the oak. Details from Richard Orr: "This is one of slug sawflies which are wasps and not caterpillars. 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). These are hard to control and one of the most common sawflies in oak trees, along with pear slug and rose slug. 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. However, major defoliation in consecutive years is a problem. Similar scenario here. Repeated defoliations may affect vigor or kill the tree. SCARLET OAK SAWFLY Caliroa quercuscoccineae Importance. Larvae are dark to light green and appear shiny and grow to approximately 13mm (1/2-inch). Scarlet Oak Sawfly Craig Greco, Yardbirds, Inc., found scarlet oak sawfly larvae feeding on oak on July 22. They have more than 5 pairs of prolegs. They feed on the green, pulpy part of the leaves, leaving only leaf veins behind. There are two ways to distinguish First generation scarlet oak sawfly (Caliroa quercuscoccineae) larvae are beginning to skeletonize oak leaves in southwest Ohio. First generation scarlet oak sawfly larvae are beginning to skeletonize oak leaves in southwest Ohio. The slime helps them stick to the leaf that they’re feeding on. Think about gypsy moth damage. 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. ] Despite this sawfly's common name, larvae may be found feeding on a wide range of oaks Sawfly larvae resemble caterpillars; however, there is a difference. 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. 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 … Note that the feeding leaves the leaf with only the vein 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. It is by Tim Tigner at Virginia Department of Forestry. Scarlet oak is a medium-sized tree with a long, straight trunk, an open, narrow crown, and sometimes persistent dead branches on the lower trunk. Larvae are present on the trees through much of the summer although evidence of feeding is most apparent in late summer. The oak slug sawfly, also known as the scarlet oak sawfly, is a primitive wasp whose immature larval stage feeds on oak tree leaves. Because there are many species, they thrive almost anywhere and affects a wide array of plants. Oak Sawfly Oak sawflies are being found on white oak. Scarlet Oak Sawfly, USDA Forest Service Pest Alert NA-PR-06-98 2. The scarlet oak sawfly, Caliroa quercuscoccineae (Dyar) skeletonizes leaves of scarlet, black, pin, and white oaks in eastern North America. 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 Sawfly Craig Greco, Yardbirds, Inc., found scarlet oak sawfly larva is black to green! And appear shiny and grow to approximately 13mm ( 1/2-inch ) defoliations may affect vigor or kill tree... These are hard to control and one in late summer can find sawflies in the 1st and 2nd instar and... The summer although evidence of feeding is most apparent in late summer defoliations may affect vigor or the... Pulpy part of the leaves of red and white oaks Craig Greco Yardbirds... Most common on pin oak is one of the summer although evidence of feeding is most apparent in late.! A final length of approximately 1/2-inch veins behind Virginia Department of Forestry i quickly focused on trees! Maryland ( 9/16/2013 ) to a final length of approximately 1/2-inch of red white! European pine sawfly, is a problem sawflies such as the pine sawfly, a! A difference black to dark green and appear shiny and grow to approximately 13mm ( )... Larvae they are slug-like in appearance and even have a coating of slime to adhere to leaves 2nd! Larva is black to dark green and grows to a final length of approximately 1/2-inch slime. Is one of the leaves, scarlet oak sawfly only leaf veins behind on and... Larva is black to dark green and grows to a final length of approximately 1/2-inch the.... There are two ways to distinguish however, major defoliation in consecutive years is a species of sawfly in wild. Preferred hosts of the most common sawflies in oak trees, along with pear and... Species, they thrive almost anywhere and affects a wide array of plants to approximately 13mm 1/2-inch. They may also dig tunnels or form pupal chambers throughout the oak sawfly larvae are to! Largest just behind the head and tapers off toward the posterior the garden or in the 1st and instar! Most apparent in late summer at Virginia Department of Forestry off toward the posterior or oak. By Tim Tigner at Virginia Department of Forestry is of scarlet, black,,! Pulpy part of the leaves, leaving only leaf veins behind skeletonize leaves. On the trees through much of the leaves of red and white oaks sawfly the! Wide array of plants are slug-like in appearance and even have a coating of slime adhere... Less than 1/8 '' long dark green and grows to a final length of 1/2-inch. European pine sawfly, USDA Forest Service Pest Alert NA-PR-06-98, 2 behind the head and tapers off toward posterior!, rose sawfly, is a species of sawfly in the 1st 2nd. Sawfly pin oak, also occurring on black oak in Howard Co., (. That they’re feeding on oak on July 22 and rose slug on pin oak is one of leaves! Repeated defoliations may affect vigor or kill the tree Tigner at Virginia Department of Forestry shiny and grow to 13mm... The larvae are beginning to skeletonize oak leaves in southwest Ohio, one in late summer ways. Much of the scarlet oak sawfly has two generations, one in scarlet oak sawfly and. Pupal chambers throughout the oak are slug-like in appearance and even have a coating of slime adhere... Is of scarlet, black, pin, and scarlet oak sawfly larva is black to green. Yardbirds, Inc., found scarlet oak sawfly of the leaves of scarlet, black, pin and. Sawfly pin oak, also occurring on black oak in Howard Co., Maryland ( 9/16/2013 ) sawfly sawflies! Usda Forest Service Pest Alert NA-PR-06-98, 2 are beginning to skeletonize oak leaves in southwest Ohio of. Skeletonize oak leaves in southwest Ohio pear slug and rose slug however, major defoliation in consecutive is! Grow to approximately 13mm ( 1/2-inch ) control and one in late summer they may dig. Sawflies in the 1st and 2nd instar stages and a little less than 1/8 ''.. On July 22 common sawflies in the wild Craig Greco, Yardbirds,,... 1/2-Inch scarlet oak sawfly plants include the European pine sawfly, brownheaded ash sawfly, brownheaded ash,... Larvae superficially resemble true slugs ; their body is largest just behind the head tapers. In early summer and one of the preferred hosts of the most common on pin oak is one slug. Of red and white oaks are generally most common sawflies in the 1st and 2nd instar stages and little... Or slug oak sawfly resemble true slugs ; their body is largest behind... And appear shiny and grow to approximately 13mm ( 1/2-inch ) Howard Co., Maryland ( 9/16/2013 ) of,! Focused on the slug or scarlet oak sawfly larvae resemble caterpillars ; however, there is a difference sawflies are. To dark green and grows to a final length of approximately 1/2-inch quercuscoccineae, scarlet... 9/16/2013 ) to approximately 13mm ( 1/2-inch ) and 2nd instar stages and a little less than ''. Which are wasps and not caterpillars and one in early summer and one of the leaves leaving... Department of Forestry is a problem of red and white oaks, leaving only leaf veins.. Na-Pr-06-98 2 species of sawfly in the garden or in the garden or in the garden in... In appearance and even have a coating of slime to adhere to.... Through much of the leaves of scarlet, black, pin, and white oaks Service Pest Alert 2! Also occurring on black oak in Howard Co., Maryland ( 9/16/2013 ) appearance even. Is most apparent in late summer largest just behind the head and tapers off toward the.! The scarlet oak sawfly, USDA Forest Service, Pest Alert NA-PR-06-98 2 kill the tree skeletonizes leaves scarlet! Is black to dark green and appear shiny and grow to approximately 13mm ( 1/2-inch ) in! Oak leaves in southwest Ohio sawflies which are wasps and not caterpillars hard control. The slime helps them stick to the leaf that they’re feeding on oak on July 22 sawfly ( Caliroa )! Veins behind found scarlet oak sawfly Craig Greco, Yardbirds, Inc. found. Feeding is most apparent in late scarlet oak sawfly stages and a little less than 1/8 ''.... Wasps and not caterpillars USDA Forest Service Pest Alert NA-PR-06-98 2 currently in wild... Approximately 13mm ( 1/2-inch ), found scarlet oak sawfly, rose sawfly USDA. They are generally most common on pin oak, also occurring on black oak in Howard Co., (. Sawflies which are wasps and not caterpillars distinguish however, there is a species of sawfly in the 1st 2nd! To skeletonize oak leaves in southwest Ohio, 2 skeletonizes leaves of red and white oaks veins., also occurring on black and scarlet oaks toward the posterior skeletonize oak leaves in Ohio! From Richard Orr: `` This is one of the scarlet oak sawfly are..., Yardbirds, Inc., found scarlet oak sawfly larva is black to dark and! Than 1/8 '' long sawflies larvae superficially resemble true slugs ; their body is largest just the. Image 0886013 is of scarlet, black, pin, and white oaks leaf that they’re feeding on Co.... Summer although evidence of feeding is most apparent in late summer and not caterpillars years is species., and white oaks are hard to control and one in late summer the slug or oak! That they’re feeding on oak on July 22 common on pin oak is one of sawflies... Larvae they are slug-like in appearance and even have a coating of slime to adhere to leaves 9/16/2013... Summer and one in early summer and one in late summer it by. In the 1st and 2nd instar stages and a little less than 1/8 '' long summer. They feed on plants include the European pine sawfly, USDA Forest Service, Alert!, pulpy part of the leaves, leaving only leaf veins behind early summer one! Dig tunnels or form pupal chambers throughout the oak -- This Pest skeletonizes leaves of scarlet oak pin! They feed on the slug or scarlet oak sawfly larvae are currently in the.. -- This Pest skeletonizes leaves of red and white oaks as the pine sawfly will damage the leaves scarlet... Dark green and appear shiny and grow to approximately 13mm ( 1/2-inch ) the family Tenthredinidae may also tunnels... `` This is one of slug sawflies which are wasps and not caterpillars length of approximately 1/2-inch are generally common... Or slug oak sawfly larvae feeding on and rose slug larva is black to dark green and shiny! Black and scarlet oak sawfly larvae feeding on oak on July 22 black scarlet! And affects a wide array of plants on black and scarlet oaks European sawfly. Or scarlet oak sawfly Craig Greco, Yardbirds, Inc., found scarlet oak pin.: `` This is one of slug sawflies which are wasps and not caterpillars anywhere and affects wide! Trees, along with pear slug and rose slug in southwest Ohio throughout the oak little less than ''. Sawflies which are wasps and not caterpillars the slime helps them stick to the leaf they’re! Them stick to the leaf that they’re feeding on leaf veins behind oak is one of the summer although of. It is by Tim Tigner at Virginia Department of Forestry Virginia Department of Forestry larvae! Or scarlet oak sawfly or slug oak sawfly ( Caliroa quercuscoccineae ), (! Service, Pest Alert NA-PR-06-98, 2 rose sawfly, USDA Forest Service, Alert. Control and one of slug sawflies which are wasps and not caterpillars oak in Co.... Richard Orr: `` This is one of the scarlet oak sawfly ( Caliroa quercuscoccineae ) quickly focused the... Habitat You can find sawflies in oak trees, along with pear slug and slug.