Pupation occurs in the spring, and adults begin emerging from pupal cases during the morning from mid-May through June. Infestations can be detected by the presence of shallow, longitudinal scars in the bark on twigs and branches. Females contain an average of 40 eggs, and lay them at old pruning sites, narrow branch crotches, and bark crevices from mid-May through June. I’m looking into it. BIOLOGY. The genus Rhododendron is divided into the subgenera categories of rhododendron and azalea, of which there are more than 1,000 species. and most have showy flower displays. Affected rhizomes also often are rotted and have a foul smell. The larva matures in October and is then about 1/2" long. This material will accumulate near the entrance holes and on the ground. Dogwood borer larva and pupa compared to a standard pencil eraser. Females contain an average of 40 eggs, and lay them at old pruning sites, narrow branch crotches, and bark crevices from mid-May through June. You can search BugGuide to try to determine the species identity.. Update: November 17, 2012 Thanks to a comment we just received, we now know that this is a Rhododendron Borer, Synanthedon rhododendri . That is all. By entering your email, you consent to receive communications from Penn State Extension. One generation occurs each year in Pennsylvania. This native pest was first described from specimens collected in Pennsylvania in 1909. Good culture practices are a key element of keeping plants resistant to bugs and germs. The adult female lays eggs on the bark of the plant. Heavily infested plants should be removed from a landscape or nursery. Small entry holes may be seen on plant stems and there may be sawdust near tunnel openings. Kingdom Animalia > Phylum Arthropoda > Class Insecta > Order Lepidoptera > Family … Applied sprays of these must be directed to the base of the major shoots and trunks to maximize effectiveness. Females attract males with their pheromone during late morning and early afternoon. Rhododendron borer, Synanthedon rhododendri Early symptoms of this pest are similar to drought stress. Either … The borer is the immature form (caterpillar) of the rhododendron borer moth. The hybrid Rhododendron P.J.M. Most people have noticed that some of the branches on their plants have curled leaves that don’t open on warm days, indicating they have been injured in some way. It is a widespread species, known from India Prune and destroy infested portions of the host plant from fall through early spring. Requires well-drained, acidic soils. View our privacy policy. Entomopathogenic nematodes may be of limited use given that the larvae of this clear-winged borer do not entirely keep their tunnels clear of sawdust and frass. Bayer doesn't cover all bases. Rhododendron borer, Synanthedon rhododendri. Eggs are laid near wounds, roughened bark, branch crotches and pruning sites. Rhodies will live hundreds of years if kept healthy. Early symptoms of attack, as described by Johnson and Lyon, appear to be drought stress, with foliage losing its color and dying. Note the three gold bands on the abdomen. The rhododendron borer is a small, whitish caterpillar. Adults have a 10-15 mm wingspread. The use of pheromone traps will assist in determining if an infestation is present in your landscape or nursery. Catawba rhododendron is a large-leaved, evergreen shrub reaching 6 to 10 feet high with large, lilac-purple flowers borne in clusters (trusses) in mid-to late spring. A Rhododendron borer has tunneled all the way through this branch, and the branch is dead. Rhododendrons are part of the family Ericacea and the genus Rhododendrons. The adult borer is a moth, which lays eggs typically at the base of the shrub or … This species overwinters in the larval stage that is located shallowly in a gallery in the host sapwood. You must have JavaScript enabled in your browser to utilize the functionality of this website. Connect with UMass Extension Landscape, Nursery and Urban Forestry Program: UMass Research and Education Center Farms, Conservation Assessment Prioritization System (CAPS), Extension Risk Management/Crop Insurance Education, North American Aquatic Connectivity Collaborative, Civil Rights and Non-Discrimination Information. An insecticide application should be made 7-10 days after the first male is captured in a pheromone trap. The genus Rhododendron is a member of the Ericaceae plant family and contains over 1000 species. Pale, spotted and wilted leaves appear in the branch above the mined area. The foliage of infested rhododendron, azalea, and mountain laurel becomes pale green and, finally, chlorotic or yellowish. The Monterey Peach Tree Borer Trap and Lure Kit effectively captures and controls clear winged moths of the borer family. LEARN HOW TO STOP THE INVASIVE SPOTTED LANTERNFLY, Coronavirus: Information and resources for the Extension Community, Save For Later Print Available in Spanish. Severe wounds are formed, often from multiple larvae infesting adjacent tunnels. Pheromone traps are available to monitor the time of adult emergence. Family: Sesiidae. Pest: Rhododendron Borer (Synanthedon rhododendri (Beutenmuller)) Order: Lepidoptera. Rhododendron Borer Moth Synanthedon rhododendri (Beutenmüller, 1909) Synonyms: Hodges #2551. Rhododendron borer larvae develop and feed inside the plant stem resulting in wilt. A goodly number of species are native to North America. One of the smallest members of the family of clearwing moths, this moth has a wingspan of 10 to 15 mm. An injection of nematodes into the stems may be appropriate if she has the stem borer. Read and follow directions and safety precautions on labels. Male rhododendron borer moths (left) are slightly smaller than females (right). Hi Melissa, The best we can do right now is a family identification. This clearwing moth lays its eggs on the bark of the shrub, frequently in a branch crotch. Good plant health care practices may minimize damage caused by this key pest. Synanthedon rhododendri Rhododendron Borer Moth (Beutenmuller, 1909) Synanthedon richardsi (Engelhardt, 1946) Synanthedon rileyana Riley's Clearwing (H. Edwards, 1881) It is only a larvacidal soil drench and fungicide. The pupal stage is brown and 5-9 mm long. While a few scattered branches may have been injured on a The top or side branches wilt and sometimes break off. It is found in India; Chilo suppressalis, the Asiatic rice borer or striped rice stemborer, is a moth of the family Crambidae. In most cases much of the damage appears to have occurred at random. Some types of rhododendrons that lose their leaves in winter are commonly called azaleas. (46) Photo: Cliff Sadof Trunk damage caused by rhododendron borer. It overwinters as a larva, usually boring low somewhere in the … Handle carefully and store in original labeled containers out of the reach of children, pets, and livestock. This species overwinters in the larval stage that is located shallowly in a gallery in the host sapwood. Chilo polychrysus, the dark - headed striped borer is a moth in the family Crambidae. Injury caused by this key pest in ornamental plantings of rhododendron tends to increase from year to year if an infestation is not effectively managed. The larvae tunnel into the branch, severely weakening it structurally. Timing insecticide control of rhododendron borer with pheromone trap catches of males. The Rhododendron Borer is Synanthedon rhododendri. Being a clear-winged moth borer, this pest expels sawdust and frass (excrement) from its tunnel during the early stages of attack. Rhododendrons and azaleas usually do not suffer greatly from insect damage but this is not always the case. Youn… the African vine borer is a moth of the family Sesiidae. Fast-growing cultivars seem to be more susceptible to attack by this species of clearwing borer. It was described by Edward Meyrick in 1932. Females attract males with their pheromone during late morning and early afternoon. It doesn't treat Rhododendron Borer, Rhododendron Gall Midge, Rhododendron Stem Borer, Southern Red Mite, and Azalea Stem Borer. ©2020 University of Massachusetts Amherst • Site Policies, Center for Agriculture, Food, and the Environment, Center for Agriculture, Food and the Environment. See All Pest, Disease and Weed Identification, See All Beer, Hard Cider, and Distilled Spirits, See All Community Planning and Engagement. Entry holes are often near branch crotches or close to the ground on the main stem. The widespread use of rhododendron and susceptible azalea cultivars may be contributing to an increase in injury caused by this pest in arboreta, community gardens, home landscapes, parks, and ornamental nurseries. JavaScript seems to be disabled in your browser. Larvae chew their way into the cambial area. Although rhododendron borers are moth larvae and stem borers are beetle larvae their behavior is similar, tunneling down through the stem toward the crown of the plant. The forewings and hindwings are transparent with a few scales on the veins. Get notified when we have news, courses, or events of interest to you. The adult is a clearwing moth that somewhat resembles a wasp. This is an organic client who prefers organic treatments for the health of her family and the environment. Let’s assume you are seeing damage from stem borers. Woodpeckers and two species of hymenopterous parasitoids are the most important natural enemies of this pest. It originates from Africa where it is known from Equatorial Guinea, Malawi, South Africa Tanzania bug Durra stem borer Eastern cherry fruit fly Eggplant shoot and fruit borer Egyptian cotton leaf worm Engraver beetle European corn borer European goat queen s nut, Zanzibar oilvine alternately spelled as oil vine etc. One of the more destructive insects of the rhododendron is the rhododendron borer, Synanthedon rhododendri (Beutenmuller), a clear-wing moth of the family Sesiidae. Kingdom Animalia ( 1ANIMK ) Phylum Arthropoda ( 1ARTHP ) Subphylum Hexapoda ( 1HEXAQ ) Class Insecta ( 1INSEC ) Order Lepidoptera ( 1LEPIO ) Family Sesiidae ( 1SESIF ) Genus Synanthedon ( 1SYNAG ) Iris borer is the most serious pest of iris in Wisconsin. Over the last couple of weeks, there have been many reports of damaged rhododendrons. The genus is spelled with … Entering your postal code will help us provide news or event updates for your area. Taxonomy. Rhododendron Borer Moth Synanthedon rhododendri (Beutenmuller, 1909). Larvae continue to grow until they prepare to overwinter. This life stage is enclosed in a cocoon that is surrounded by frass and other debris. Dispose of empty containers right away, in a safe manner and place. At maturity the larval stage is 10 mm long. You need to find the problems and treat the problems. The latter includes mites, scale and an occasional borer. Mature larvae cut exit holes through the bark, then retreat in the gallery, plugging it with frass. These types of moths harm the roots and trunks of trees, causing permanent damage to leaves and fruit. Do not contaminate forage, streams, or ponds. The rhododendron borer is a native pest of rhododendron, sometimes attacking mountain laurel and deciduous azaleas growing adjacent to infested host plants. Dogwood borer moths are in the same family of clearwing moths (sesiidae) as the peachtree borer, rhododendron borer and the lilac borer. (63) Photo: John Davidson A registered insecticide should be applied according to label directions to the trunk and larger twigs sometime during the period from mid-May through early July. Larvae are yellowish white with a reddish brown head and thoracic legs. Adults do not feed and live for only a day or two. The other cause for dead branches on an otherwise healthy looking plant could be an infestation of Rhododendron stem borers. On close examination of affected plants, a pinkish-white caterpillar can be found feeding on the inside of rhizomes. Excellent for shade gardens or in a sheltered site. They resume feeding in late March, undergoing seven instars until they are fully grown. Wilted rhododendron stems are usually caused either by a soil-borne disease called phytopthora root rot or by feeding damage of rhododendron borers. Adults do not feed and live for only a day or two. This is a Clearwing Moth in the family Sesiidae, a group that includes many mimics of wasps and bees. Blueberry stem borer is a beetle also known as the rhododendron stem borer and the azalea stem borer. Oftentimes, heavy infestations are not realized until severe symptoms are evident. (62) Photo: John Davidson Rhododendron borer adult male. Holes may be apparent in the bark, particularly at limb crotches. Growth of infested plants is restricted and fewer blooms may be produced. Relatively few rhododendrons are fully hardy in the Chicago area or can cope well with its alkaline soils. Authored by: Greg Hoover, Sr. Extension Associate. Iris plants attacked by iris borer will discolor, wilt, and die during late June and July. Scientific Name Subject Name Subfamily Tribe; long-horned beetles: Achryson surinamum (Linnaeus, 1767): long-horned beetle: Cerambycinae: Achrysonini: … Young larvae hatch and bore into cambial tissue and then sapwood. Entomol. Native to southeastern United States. Moths are active from late May through much of June, in Massachusetts. Additionally, the use of these traps will help better time an effective insecticide application. Developed by the University of Georgia Bugwood Network in cooperation with USDA Forest Service - Forest Health Protection, USDA APHIS PPQ, Georgia Forestry Commission, Texas Forest Service This moth is indigenous to the United States. The rhododendron borer is one of the smallest clearwing borers found in Pennsylvania. It includes the plants known to gardeners as azalea, which was … Written by: Robert ChildsRevised: 10/2011. Small host plants are susceptible and may be killed by a light infestation. Environ. Host Plants: Rhododendrons, mountain laurel (Kalmia), and deciduous azaleas (Johnson & Lyon) Description: Early symptoms of attack, as described by Johnson and Lyon, appear to be drought stress, with foliage losing its color and dying. 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