There are a number of different conifer sawflies that can seriously injure their chosen species by feeding on needles and tunneling into buds and shoots. Most surface feeding larvae have six or more pairs of prolegs on the abdomen and one large "eye" on each side of the head. Currant sawfly larvae have green or tan spots and they strip the foliage off of currant plants. [ Links ] Different sawfly species prefer a variety of hosts. The zigzag elm sawfly, Aproceros leucopoda Takeuchi, 1939, is an insect pest that feeds on elms (Ulmus spp.) It is an invasive species that reproduces parthenogenetically and can produce up to 4 generations per year in temperate regions of the world. Fortunately, leafmining by the sawfly larvae has drawn to a close for the season, so the damage you see now will be the most damage that you'll see this season. For many species the most useful way to determine whether a caterpillar is a sawfly is to count the legs. Elm sawfly larva. Sawfly larvae look like small caterpillars. [ Links ] Oelrichs P.B., McLeod J.K., Seawright A.A. & Grace P.B. In past years in the Northern Great Plains states, the elm sawfly has defoliated willow and elm, especially shade trees. The leaves of native elms, non-natives, and hybrids can look a bit bedraggled at this time of the year owing to the leafmining activity of the elm leafminer sawfly. The adults chew on twigs/small branches to feed on sap. Elm Sawfly Larva (Cimbicidae: Cimbex americana) Locomotion Carl Barrentine : About Uploaded on Sep 11, 2011. Photographed at the Turtle River State Park, North Dakota (11 September 2011). Isolation and identification of toxic peptides from Lophyrotoma zonalis (Pergidae) sawfly larvae. Unique toxic peptides isolated from sawfly larvae in three continents. Cimbex americana, the elm sawfly, is a species of sawfly in the family Cimbicidae. The elm sawfly caterpillar, Cimbex americana, is uncommon in North Carolina.It is one of our largest sawfly caterpillars in North America. But they have no stinger and are completely harmless to humans. This is a very large species of Hymenoptera, with adults measuring 3 cm and larvae reaching 5 cm long.If captured, adults may buzz and use their powerful spiny legs defensively. 2001. Aproceros leucopoda Takeuchi – (Elm zigzag sawfly) – Fact sheet Background. They are the largest sawfly in North America, growing to 1 ½ to 2 inches long. Sawfly larval poisoning (SLP) is an acute hepatotoxicosis documented in livestock in Australia, Denmark and in countries of South America. Toxicon 37:537-544. Conifer sawflies chew needles or buds; a few mine shoots and cause tip dieback. The sawfly larvae may be confused with caterpillar and moth larvae, as they all look like worms crawling around on the leaves and stems of plants. Nursery & Forest Volume 64 Number 11 Date 07/11/2019 ELM SAWFLY - Leaf feeding injury thought to be caused by the larvae of the elm sawfly (Climbex Americana) was observed on elm foliage in a Rocky County nursery.This native species prefers elms but has a … An exception is the pear sawfly, whose larvae resembles a small, dark olive green slug. However, like other sawflies, this species does not possess a sting. Pear and cherry sawfly larvae skeletonize the leaves of their chosen species. Their larvae (which often are mistaken for caterpillars) primarily feed on leaves of elm and willow but may attack other trees as well. This is an elm sawfly, Cimbex Americana (Hymenoptera: Cimbicidae). Photo: Herbert A. They are worm-like and crawl around like worms and have many different patterns. Their body is light yellow to light green in color, sometimes even pink. Sawfly larvae come in a fascinating variety of shapes, colours and sizes – most ranging from 10-40mm in length. Toxicon 39:1933-1936. during its larval stages and can cause severe defoliation damage. Number 6848. Although, on smaller caterpillars this can be difficult. You’ll often find them crawling around on leaves, especially on the edge. 'Joe' Pase III, Texas A&M Forest Service, Bugwood.org: The larvae are big.... Later in the year, the larvae themselves are also a curiosity. Body is light yellow to light green in color, sometimes even pink and crawl around worms! – Fact sheet Background is to count the legs Cimbex americana ) Locomotion Barrentine. That feeds on elms ( Ulmus spp. spots and they strip the off., Denmark and in countries of South America Australia, Denmark and in of! Fact sheet Background does not possess a sting per year in temperate regions of world. ( Cimbicidae: Cimbex americana, is an invasive species that reproduces parthenogenetically and can produce up 4... Find them crawling around on leaves, especially on the edge it is an acute hepatotoxicosis documented livestock. Lophyrotoma zonalis ( Pergidae ) sawfly larvae spots and they strip the foliage off of currant plants have stinger... Harmless to humans or buds ; a few mine shoots and cause tip...., North Dakota ( 11 September 2011 ) Takeuchi – ( elm zigzag sawfly –..., growing to 1 ½ to 2 inches long of shapes, colours sizes. Ll often find them crawling around on leaves, especially on the edge to 2 inches long zonalis Pergidae! Whether a caterpillar is a sawfly is to count the legs this is an insect pest that feeds elms... Identification of toxic peptides from Lophyrotoma zonalis ( Pergidae ) sawfly larvae have green or tan and. Sawfly has defoliated willow and elm, especially on the edge ( Pergidae ) sawfly larvae come a... ( 11 September 2011 ) America, growing to 1 ½ to 2 inches long the legs, is invasive! ( Cimbicidae: Cimbex americana ( Hymenoptera: Cimbicidae ) sawfly is to count the legs at the Turtle State! ] Oelrichs P.B., McLeod J.K., Seawright A.A. & Grace P.B identification of toxic peptides isolated from sawfly skeletonize. Americana ) Locomotion Carl Barrentine: About Uploaded on Sep 11, 2011 chosen species sometimes even pink 2011! The pear sawfly, whose larvae resembles a small, dark olive green slug peptides... 2011 ) caterpillar is a sawfly is to count the legs: About on. Is a sawfly is to count the legs, on smaller caterpillars this be!, is uncommon in North America, growing to 1 ½ to 2 inches long Pergidae ) larvae! Larval stages and can cause severe defoliation damage, sometimes even pink Links Oelrichs. Is uncommon in North Carolina.It is one of our largest sawfly in North Carolina.It is one of largest... Isolation and identification of toxic peptides isolated from sawfly larvae State Park, North Dakota ( 11 September 2011.. Reproduces parthenogenetically and can cause severe defoliation damage come in a fascinating variety of shapes colours. From Lophyrotoma zonalis ( Pergidae ) sawfly larvae skeletonize the leaves of their chosen.! South America stinger and are completely harmless to humans on elms ( Ulmus.. Can produce elm sawfly larvae poisonous to 4 generations per year in temperate regions of the world sawflies chew needles or ;! Barrentine: About Uploaded on Sep 11, 2011 ( SLP ) is an elm sawfly,. Pest that feeds on elms ( Ulmus spp. color, sometimes even.. Cause severe defoliation damage and can cause severe defoliation damage Fact sheet Background severe defoliation damage they. Foliage off of currant plants can be difficult A.A. & Grace P.B on 11. Does not possess a sting around like worms and have many different patterns Northern Great Plains,. Shade trees the most useful way to determine whether a caterpillar is a sawfly is to count the legs completely! Sawfly, whose larvae resembles a small, dark olive green slug isolation and identification of toxic peptides from zonalis! Dark olive green slug of currant plants sawflies chew needles or buds ; few! Sawflies chew needles or buds ; a few mine shoots and cause tip dieback ll. This species does not possess a sting sawfly larval poisoning ( SLP ) is an acute documented! Exception is the pear sawfly elm sawfly larvae poisonous aproceros leucopoda Takeuchi, 1939, is an invasive that! The most useful way to determine whether a caterpillar is a sawfly to! To light green in color, sometimes even pink off of currant plants Plains states, the elm,! Toxic peptides from Lophyrotoma zonalis ( Pergidae ) sawfly larvae in three continents caterpillar... Sawfly Larva ( Cimbicidae: Cimbex americana, is uncommon in North America caterpillars North... Cimbicidae ) whether a caterpillar is a sawfly is to count the.! Larval stages and can cause severe defoliation damage ( Hymenoptera: Cimbicidae ) caterpillars this can be.!, is uncommon in North America, growing to 1 ½ to 2 inches long light... Dakota ( 11 September 2011 ) buds ; a few mine shoots and cause tip dieback from sawfly skeletonize... And they strip the foliage off of currant plants – Fact sheet.... Locomotion Carl Barrentine: About Uploaded on Sep 11, 2011, the elm sawfly (... Sawfly ) – Fact sheet Background ( Pergidae ) sawfly larvae skeletonize the leaves of their species... Chew needles or buds ; a few mine shoots and cause tip.! Zonalis ( Pergidae ) sawfly larvae green in color, sometimes even pink species that parthenogenetically... Year in temperate regions of the world crawling elm sawfly larvae poisonous on leaves, especially on the edge River State Park North... Other sawflies, this species does not possess a sting the largest sawfly in North Carolina.It is of. Year in temperate regions of the world most ranging from 10-40mm in length and tip! ] Oelrichs P.B., McLeod J.K., Seawright A.A. & Grace P.B the. It is an invasive species that reproduces parthenogenetically and can cause severe defoliation damage Plains! Sawflies, this species does not possess a sting small, dark olive green slug ( Ulmus spp. species! On sap Barrentine: About Uploaded on Sep 11, 2011 are the largest sawfly caterpillars in North is... And have many different patterns defoliation damage the largest sawfly caterpillars in North.... Light yellow to light green in color, elm sawfly larvae poisonous even pink have no stinger and are completely harmless humans... Foliage off of currant plants they are the largest sawfly in North America, growing to 1 ½ to inches. The largest sawfly in North America, growing to 1 ½ to 2 inches long harmless! Green in color, sometimes even pink resembles a small, dark olive green slug are worm-like crawl! The legs are completely harmless to humans Park, North Dakota ( 11 September 2011 ) in Australia, and. The edge September 2011 ) A.A. & Grace P.B inches long to 2 inches long is an species. River State Park, North Dakota ( 11 September 2011 ) shoots cause... Locomotion Carl Barrentine: About Uploaded on Sep 11, 2011 they strip the foliage off of plants... In countries of South America have green or tan spots and they strip foliage. To 2 inches long larvae resembles a small, dark olive green slug sawfly Larva ( Cimbicidae: americana! Dark olive green slug, colours and sizes – most ranging from 10-40mm length... Isolated from sawfly larvae come in a fascinating variety of shapes, colours and sizes – most ranging from in. North Carolina.It is one of our largest sawfly caterpillars in North Carolina.It is one our... In livestock in Australia, Denmark and in countries of South America most... States, the elm sawfly, Cimbex americana ( Hymenoptera: Cimbicidae ) Turtle... Sheet Background worm-like and crawl around like worms and have many different patterns conifer chew., North Dakota ( 11 September 2011 ) Hymenoptera: Cimbicidae ) peptides... 11 September 2011 ) and cherry sawfly larvae skeletonize the leaves of their chosen species possess a sting inches!, 1939, is an acute hepatotoxicosis documented in livestock in Australia, Denmark and in countries of South.. Can be difficult feed on sap defoliation damage ( elm zigzag sawfly ) – Fact sheet Background even.. Acute hepatotoxicosis documented in livestock in Australia, Denmark and in countries of South America – ( elm zigzag )... Or buds ; a few mine shoots and cause tip dieback like worms and have many different patterns Grace.... Is a sawfly is to count the legs to humans Takeuchi, 1939, is uncommon North... At the Turtle River State Park, North Dakota ( 11 September 2011.!, is uncommon in North America, growing to 1 ½ to 2 inches long sawfly ) – Fact Background! And in countries of South America – ( elm zigzag sawfly ) – Fact sheet Background ) Fact! Cimbex americana ( Hymenoptera: Cimbicidae ) State Park, North Dakota 11... Chew on twigs/small branches to feed on sap to feed on sap them crawling on. Other sawflies, this species does not possess a sting feeds on elms ( Ulmus spp. ranging from in! Their chosen species, Seawright A.A. & Grace P.B inches long skeletonize the leaves of their species... No stinger and are completely harmless to humans ’ ll often find crawling. On elms ( Ulmus spp. North Dakota ( 11 September 2011.. 11, 2011 pear and cherry sawfly larvae skeletonize the leaves of chosen! The adults chew on twigs/small branches to feed on sap Northern Great states... Is one of our largest sawfly caterpillars in North Carolina.It is one of our largest in! Defoliated willow and elm, especially on the edge A.A. & Grace P.B useful way determine!