Fact Sheets & Plant Guides is a partnership of the National Plant Data Team and the Plant Materials Program. Several Liriomyza species of leafmining flies make long serpentine mines through leaves of flower and vegetable garden plants. The deciduous four-inch-long, glossy leaves are dark green above and lighter below and … startxref xref Leafminers are sometimes classified by the pattern of the mine which they create. Fact Sheets provide brief descriptions of a plant, its uses, and cultural recommendations. TSX-V:WGO $0.98 -0.01 OTC - NASDAQ INTL: WHGOF $0.74 -0.02 They can be differentiated by pulling apart the blotchy area. the insect and/or its droppings (frass). Wildlife: Speckled alder thickets provide cover for moose, white-tailed deer, rabbits, and others.
3/96. 0000008863 00000 n Insecticides applied when leafminers lay eggs are useful for control of many leafminers. 250 0 obj<>stream The mine of the European elm flea weevil originates from a leaf vein, meanders in a serpentine form, and ultimately terminates in a leaf blotch along the edge of the leaf. Any donation of time or money is greatly appreciated. white alder Betulaceae Alnus rhombifolia Nutt. Large black blotches in poplar leaves are produced by larvae of a leaf beetle (Zeugophora scutellaris). Spinach leafminers pose different problems as they appear on edible crops. Stems: smooth, hairless.
Probably two generations are normally produced. Leaves with actively growing larvae should be picked and destroyed; leaving picked leaves on the ground will allow the larvae to finish development. 0000007183 00000 n White alder occurs in inland areas while red alder generally grows in areas of maritime influence. Alder, Pyramidalis European (Alnus glutinosa 'Pyramidalis') [155KB] Betulaceae Alder, White ( Alnus rhombifolia ) [157KB] Betulaceae All Seasons Sugar Hackberry ( … We have 3 regions; Peaks and Plains, Front Range and Western.
Elm leafminer (Kaliofenusa ulmi) is the most important species, being locally common in several Front Range cities where it develops on American, English and Siberian elms. Cranshaw, D.A. ©2020, Colorado State University Extension, Fort Collins, Colorado 80523 USA. Also, most leafminers have important natural controls which normally check populations before too much injury is done to plants. Stipules short, needle-point on bluntish end. Problems are most common in gardens where spinach and beets are overwintered and continuously grown, providing host plants for the insects. The Future of Nearshore Processes Research, “Hurricane Sandy Coastal Projects Performance Evaluation Study,”, “Reducing Risk on the East and Gulf Coasts”, Resilient Coastal Systems and Community Planning, Managing Sea Level Change on Shores and Beaches, The State of U.S. Coastal Engineering & Science, Reintroducing Structures for Erosion Control on the Open Coasts of America, Surfers as Coastal Protection Stakeholders, NOAA’s National Coastal Zone Management Program Publications.
Plant Guides are similar but more extensive. Optimum range, 18-30°C, Grasses: most temperate and subtropical spp. Heartwood is formed only in trees of advanced age and there is no visible boundary between sap and heartwood. When choosing selective herbicides, consider the stage of growth of the white clover and what non-target companion species are present. These tentiform leafminers occur on willows, poplars, and cottonwoods, hackberry and apple and leaf mines tend to be concentrated on the lower, shaded leaves. Other species include: hawthorn leafminer (Profenusa canadensis) associated with Crateagus crus-galli, C. persimilis, and C. erectus; birch leafminer (Fenusa pusilla) present in some plantings of white or gray birches; and alder leafminer (Fenusa dohrnii), a native species that develops in alder leaves. The developing larvae produce large blotch mines in leaves during late spring. Neonicotinoids tend to be poor in control of caterpillars, the larval stage of moths (Lepidoptera).
European elm flea weevil. Providing trusted, practical education to help you solve problems, develop skills and build a better future.
Contact your local county Extension office through our County Office List. More common are various blotch leaf mines which are generally irregularly rounded. Normally these insects are very well controlled by natural enemies and outbreaks are almost always associated with use of insecticides. Few, if any, leafminers pose any significant threat to the health of trees or shrubs. Although injuries produced by leafmining insects can be unattractive, it is rare for them to significantly affect plant health. If controls are attempted with insecticides there are two approaches to consider. The only insect that regularly mines edible parts of plants is the spinach leafminer (Pegomya hyoscyami), which produces large, dark blotchmines in leaves of spinach, beets, and related weeds. Adults are tiny beetles that jump which makes pits in leaves, producing a lacy appearance of foliage when they are abundant. Outbreaks, if they occur, are usually very short-lived. Viral: Alfalfa Mosaic Virus, White Clover Mosaic Virus, Clover Yellow Vein Virus Mycoplasma: Phyllody Herbicide susceptibility. symbol: ALRH2 Leaf: Alternate, simple, deciduous, ovate or oval, 2 to 4 inches long, with finely serrated or doubly serrated margins (not revolute); green to yellow-green above and paler green below. 0000003224 00000 n The larvae make a leaf mine in elm that superficially resembles that of the elm leafminer sawfly. 0000011418 00000 n Adults chew small pits in the leaf. 0000005286 00000 n Probably the newest leafmining insect to establish in Colorado is the European elm flea weevil (Orchestes alni). White alder does not have red inner bark or rolled leaf margins. Controls have not been evaluated for the columbine leafminers but they are likely able to be managed in the manner of leafminers on trees and shrubs. 0000012267 00000 n
Educational resources available through ASBPA include White Papers (e.g., Reducing Coastal Risk) and Fact Sheets and Position Papers, which provide basic information on coastal science and engineering (e.g., How Beach Nourishment Projects Work) and fundamentals of policy and public concerns (e.g., Guidance on Incorporating Surfing Concerns into Planning and Design of Federal Shore Protection and Navigation Projects). Cold and frost tolerant. clovers, 2-4 kg/ha; sow at 5-15 mm into a clean, finely worked seed bed and roll, Correct any nutrient deficiencies, especially K, P, Mo, S, Cu, B. Poplar blackmine beetle.
0000000933 00000 n 0000004008 00000 n 0000002883 00000 n WORKING PROPERTIES Cranshaw, Colorado State University Extension entomologist and professor, bioagricultural sciences and pest management; D.A. Tentiform Leafminers. A wide range of weeds may be encountered.
Some will also pupate within the leaf mine, while others have larvae that cut their way out when full-grown to pupate in the soil. If damaged by insects the leaf or needle will have a hollow area and may expose either 0000009758 00000 n Spherical seedhead, Leaves: trifoliate, leaflets oval or heart shape may have light crescent mark on upper side. USDI, GS, BRD, Northern Prairie 0000002334 00000 n Excellent cattle pasture. 0000004808 00000 n The deciduous four-inch-long, glossy leaves are dark green above and lighter below and appear just after the springtime display of the six-inch-long, greenish-yellow catkins. Related species occur in lodgepole pine, pinyon, and spruce. Just over 30 different species of alder trees exist and are used by landscapers in garden areas plagued with nutrient-poor or wet soils. Adults are tiny dark flies and females make leaf punctures with their ovipositor so that they can drink plant fluids. The feeding by the caterpillars that produce the mines produces insignificant damage and is notably mostly because they may attract attention.
Please consider contributing to the ASBPA. Tolerates low exchangeable aluminium and poorly drained soils. Outbreaks are rare because these insects are normally heavily attacked by parasites and other natural enemies. Very suitable for silage/hay.
Prolific seeder. Sprays of systemic neonicotinoid insecticides (imidacloprid, dinotefuran) can provide some control of these stages among leafminers that are beetles (Coleoptera) or sawflies (Hymenoptera).
Links to informational resources published by Federal Agencies are also provided. Leatherman and J.R. Feucht* (7/14). 0000004565 00000 n 0000001466 00000 n The eggs of this insect are quite distinctive, being white and laid in small masses. 0000005064 00000 n 0000004518 00000 n Can be grazed hard but is susceptible to sustained heavy grazing by sheep in dry conditions; densely stoloniferous but varies with cultivars, small leaved cultivars are less susceptible. %%EOF Wherever you live, Extension’s job is to determine what issues, concerns and needs are unique to each community, and offer sound and effective solutions.
Furthermore most leafminers have numerous natural enemies that normally well regulate their populations.