Deer Mouse Predation on the Biological Control Agent, Urophora Spp., Introduced to Control Spotted Knapweed
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Influence of Seed Head–Attacking Biological Control Agents
BIOLOGICAL CONTROLÑWEEDS Influence of Seed Head–Attacking Biological Control Agents on Spotted Knapweed Reproductive Potential in Western Montana Over a 30-Year Period 1,2 3 1 1 JIM M. STORY, LINCOLN SMITH, JANELLE G. CORN, AND LINDA J. WHITE Environ. Entomol. 37(2): 510Ð519 (2008) ABSTRACT Five insect biological control agents that attack ßower heads of spotted knapweed, Centaurea stoebe L. subsp. micranthos (Gugler) Hayek, became established in western Montana between 1973 and 1992. In a controlled Þeld experiment in 2006, seed-head insects reduced spotted knapweed seed production per seed head by 84.4%. The seed production at two sites in western Montana where these biological control agents were well established was 91.6Ð93.8% lower in 2004Ð2005 than 1974Ð1975, whereas the number of seed heads per square meter was 70.7% lower, and the reproductive potential (seeds/m2) was 95.9Ð99.0% lower. The average seed bank in 2005 at four sites containing robust spotted knapweed populations was 281 seeds/m2 compared with 19 seeds/m2 at four sites where knapweed density has declined. Seed bank densities were much higher at sites in central Montana (4,218 seeds/m2), where the insects have been established for a shorter period. Urophora affinis Frauenfeld was the most abundant species at eight study sites, infesting 66.7% of the seed heads, followed by a 47.3% infestation by Larinus minutus Gyllenhal and L. obtusus Gyllenhal. From 1974 to 1985, Urophora spp. apparently reduced the number of seeds per seed head by 34.5Ð46.9%; the addition of Larinus spp. further reduced seed numbers 84.2Ð90.5% by 2005. -
Milk Thistle
Forest Health Technology Enterprise Team TECHNOLOGY TRANSFER Biological Control BIOLOGY AND BIOLOGICAL CONTROL OF EXOTIC T RU E T HISTL E S RACHEL WINSTON , RICH HANSEN , MA R K SCH W A R ZLÄNDE R , ER IC COO M BS , CA R OL BELL RANDALL , AND RODNEY LY M FHTET-2007-05 U.S. Department Forest September 2008 of Agriculture Service FHTET he Forest Health Technology Enterprise Team (FHTET) was created in 1995 Tby the Deputy Chief for State and Private Forestry, USDA, Forest Service, to develop and deliver technologies to protect and improve the health of American forests. This book was published by FHTET as part of the technology transfer series. http://www.fs.fed.us/foresthealth/technology/ On the cover: Italian thistle. Photo: ©Saint Mary’s College of California. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, sex, religion, age, disability, political beliefs, sexual orientation, or marital or family status. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA’s TARGET Center at 202-720-2600 (voice and TDD). To file a complaint of discrimination, write USDA, Director, Office of Civil Rights, Room 326-W, Whitten Building, 1400 Independence Avenue, SW, Washington, D.C. 20250-9410 or call 202-720-5964 (voice and TDD). USDA is an equal opportunity provider and employer. The use of trade, firm, or corporation names in this publication is for information only and does not constitute an endorsement by the U.S. -
Multi-Trophic Level Interactions Between the Invasive Plant
MULTI-TROPHIC LEVEL INTERACTIONS BETWEEN THE INVASIVE PLANT CENTAUREA STOEBE, INSECTS AND NATIVE PLANTS by Christina Rachel Herron-Sweet A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Land Resources and Environmental Sciences MONTANA STATE UNIVERSITY Bozeman, Montana May 2014 ©COPYRIGHT by Christina Rachel Herron-Sweet 2014 All Rights Reserved ii DEDICATION To my parents and grandparents, who instilled in me the value of education and have been my biggest supporters along the way. iii ACKNOWLEDGEMENTS Special thanks go to my two advisers Drs. Jane Mangold and Erik Lehnhoff for all their tremendous support, advice and feedback during my graduate program. My two other committee members Drs. Laura Burkle and Jeff Littlefield also deserve a huge thank you for the time and effort they put into helping me with various aspects of my project. This research would not have been possible without the dedicated crew of field and lab helpers: Torrin Daniels, Darcy Goodson, Daniel France, James Collins, Ann de Meij, Noelle Orloff, Krista Ehlert, and Hally Berg. The following individuals deserve recognition for their patience in teaching me pollinator identification, and for providing parasitoid identifications: Casey Delphia, Mike Simanonok, Justin Runyon, Charles Hart, Stacy Davis, Mike Ivie, Roger Burks, Jim Woolley, David Wahl, Steve Heydon, and Gary Gibson. Hilary Parkinson and Matt Lavin also offered their expertise in plant identification. Statistical advice and R code was generously offered by Megan Higgs, Sean McKenzie, Pamela Santibanez, Dan Bachen, Michael Lerch, Michael Simanonok, Zach Miller and Dave Roberts. Bryce Christiaens, Lyn Huyser, Gil Gale and Craig Campbell provided instrumental consultation on locating field sites, and the Circle H Ranch, Flying D Ranch and the United States Forest Service graciously allowed this research to take place on their property. -
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9999999999 Urophora affinis Frfld. INVASIVE SPECIES ATTACKED: Diffuse knapweed (Centaurea diffusa) Spotted knapweed (C. biebersteinii) TYPE OF AGENT: Seed feeding fly COLLECTABILITY: Mass ORIGIN: France and Russia DESCRIPTION AND LIFE CYCLE Adult: The 1 - 3 mm long flies have dark bodies and clear wings marked with faint dark bars. When at rest their wings are often held close in line with the body. Females can be identified by their long, pointed, black ovipositor. Urophora affinis adults emerge in June and July which coincides with the flower budding stage. Adults mate immediately and start to lay eggs between immature flower bracts within three days. Each female lays 120 eggs. There is a narrow egg-laying phase for U. affinis where the host plant’s floral buds must be a specific size to ensure egg hatching coincides with a particular stage necessary for larvae development. Egg: Fig. 1. U. affinis adult female with The eggs incubate for 3 - 4 days. prominent ovipositor (credit Powell et al. 1994) Larva: Creamy, white larvae penetrate into the flower head and develop into a plump, 'barrel-like' shape. The plant objects to the intruding larvae and over 10 - 15 days produces a woody gall around each of them. The galls are lined with nutritive cells that the larvae feed upon. After 28 days, all the cells inside the gall will be consumed and the larvae development will be complete. Under normal conditions 1 - 2 galls are produced in diffuse knapweed, whereas, 2 - 5 galls are produced in spotted knapweed. The hard galls provide protection for the larvae and pupae during their development from most other seed-feeding insects. -
Integrated Noxious Weed Management Plan: US Air Force Academy and Farish Recreation Area, El Paso County, CO
Integrated Noxious Weed Management Plan US Air Force Academy and Farish Recreation Area August 2015 CNHP’s mission is to preserve the natural diversity of life by contributing the essential scientific foundation that leads to lasting conservation of Colorado's biological wealth. Colorado Natural Heritage Program Warner College of Natural Resources Colorado State University 1475 Campus Delivery Fort Collins, CO 80523 (970) 491-7331 Report Prepared for: United States Air Force Academy Department of Natural Resources Recommended Citation: Smith, P., S. S. Panjabi, and J. Handwerk. 2015. Integrated Noxious Weed Management Plan: US Air Force Academy and Farish Recreation Area, El Paso County, CO. Colorado Natural Heritage Program, Colorado State University, Fort Collins, Colorado. Front Cover: Documenting weeds at the US Air Force Academy. Photos courtesy of the Colorado Natural Heritage Program © Integrated Noxious Weed Management Plan US Air Force Academy and Farish Recreation Area El Paso County, CO Pam Smith, Susan Spackman Panjabi, and Jill Handwerk Colorado Natural Heritage Program Warner College of Natural Resources Colorado State University Fort Collins, Colorado 80523 August 2015 EXECUTIVE SUMMARY Various federal, state, and local laws, ordinances, orders, and policies require land managers to control noxious weeds. The purpose of this plan is to provide a guide to manage, in the most efficient and effective manner, the noxious weeds on the US Air Force Academy (Academy) and Farish Recreation Area (Farish) over the next 10 years (through 2025), in accordance with their respective integrated natural resources management plans. This plan pertains to the “natural” portions of the Academy and excludes highly developed areas, such as around buildings, recreation fields, and lawns. -
Centaurea Stoebe Ssp. Micranthos
Species: Centaurea stoebe ssp. micranthos http://www.fs.fed.us/database/feis/plants/forb/cenmac/all.html SPECIES: Centaurea maculosa Introductory Distribution and occurrence Management Considerations Botanical and ecological characteristics Fire ecology Fire effects References INTRODUCTORY SPECIES: Centaurea maculosa AUTHORSHIP AND CITATION FEIS ABBREVIATION SYNONYMS NRCS PLANT CODE COMMON NAMES TAXONOMY LIFE FORM FEDERAL LEGAL STATUS OTHER STATUS AUTHORSHIP AND CITATION: Zouhar, Kris. 2001. Centaurea maculosa. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis/ [2007, September 24]. FEIS ABBREVIATION: CENMAC SYNONYMS: Centaurea biebersteinii DC. [82] Centaurea stoebe L. ssp. micranthos (Gugler) Hayek [137] NRCS PLANT CODE [212]: CEBI2 1 of 58 9/24/2007 4:04 PM Species: Centaurea stoebe ssp. micranthos http://www.fs.fed.us/database/feis/plants/forb/cenmac/all.html COMMON NAMES: spotted knapweed TAXONOMY: The scientific name for spotted knapweed is Centaurea maculosa Lam. (Asteraceae) [45,67,217,233]. Oschmann [137] suggests that in North America, the name Centaurea maculosa has been misapplied to Centaurea stoebe ssp. micranthos. The taxonomy of spotted knapweed is discussed in Ochsmann [137] and on the Centaurea website. Oschsmann [136] also cites evidence of hybridization between spotted and diffuse knapweed (Centaurea diffusa) in at least 7 U.S. states. The hybrid is named Centaurea × psammogena Gayer. LIFE FORM: Forb FEDERAL LEGAL STATUS: No special status OTHER STATUS: Spotted knapweed has been declared a noxious or restricted weed in at least 15 states in the U.S. and 4 Canadian provinces [213]. -
Tephritid Flies Recording Scheme June 2020
TEPHRITID FLIES RECORDING SCHEME JUNE 2020 Since the last note (Bulletin of the Dipterists Forum 84: pp. 8-10), based on data from England, Wales and Scotland, the British Tephritidae Recording Scheme database has continued to grow and a further summary is provided for records ascertained to the end of 2019. COVERAGE 1878 hectads throughout the region. 2 Number of species 1 - 5 6 - 10 11 - 15 1 16 - 20 21 - 25 26 - 30 31 - 35 36 - 40 0 41 - 45 9 8 7 6 5 4 3 2 1 0 9 0 1 2 3 4 5 6 DATA For the majority of species the data are presented as the total number of hectads from all date classes (pre 1920 or date unknown, 1920-1939, 1940-1959, 1960-1979, 1980-1999 and 2000-2019) with the numbers in brackets showing ‘new’ hectads during the respective periods. Dithryca guttularis (Meigen, 1826). 178, 21, 10 (10), 2 (2), 11 (10), 93 (85), 71 (50). Myopites eximius Séguy, 1932. 45, 3, 3 (3), 2 (1), 1 (0), 22 (18), 36 (20). Myopites inulaedyssentericae Blot, 1827. 126, 5, 4 (4), 3 (2), 2 (2), 60 (53), 97 (60). Urophora cardui (Linnaeus, 1758). 485, 25, 17 (10), 15 (7), 26 (19), 254 (217), 382 (207). Urophora cuspidata (Meigen, 1826). 40, 0, 2 (2), 2 (2), 3 (2), 19 (18), 22 (16). Urophora jaceana (Hering, 1935). 698, 43, 22 (17), 14 (9), 50 (47), 362 (325), 397 (257). Urophora quadrifasciata (Meigen, 1826). 294, 12, 15 (10), 13 (8), 5 (3), 115 (107), 219 (154). Urophora solstitialis (Linnaeus, 1758). -
Assessment of Insects, Primarily Impacts of Biological Control Organisms and Their Parasitoids, Associated with Spotted Knapweed (Centaurea Stoebe L
University of Tennessee, Knoxville TRACE: Tennessee Research and Creative Exchange Masters Theses Graduate School 8-2004 Assessment of Insects, Primarily Impacts of Biological Control Organisms and Their Parasitoids, Associated with Spotted Knapweed (Centaurea stoebe L. s. l.) in Eastern Tennessee Amy Lynn Kovach University of Tennessee - Knoxville Follow this and additional works at: https://trace.tennessee.edu/utk_gradthes Part of the Plant Sciences Commons Recommended Citation Kovach, Amy Lynn, "Assessment of Insects, Primarily Impacts of Biological Control Organisms and Their Parasitoids, Associated with Spotted Knapweed (Centaurea stoebe L. s. l.) in Eastern Tennessee. " Master's Thesis, University of Tennessee, 2004. https://trace.tennessee.edu/utk_gradthes/2267 This Thesis is brought to you for free and open access by the Graduate School at TRACE: Tennessee Research and Creative Exchange. It has been accepted for inclusion in Masters Theses by an authorized administrator of TRACE: Tennessee Research and Creative Exchange. For more information, please contact [email protected]. To the Graduate Council: I am submitting herewith a thesis written by Amy Lynn Kovach entitled "Assessment of Insects, Primarily Impacts of Biological Control Organisms and Their Parasitoids, Associated with Spotted Knapweed (Centaurea stoebe L. s. l.) in Eastern Tennessee." I have examined the final electronic copy of this thesis for form and content and recommend that it be accepted in partial fulfillment of the equirr ements for the degree of Master of Science, with a major in Entomology and Plant Pathology. Jerome F. Grant, Major Professor We have read this thesis and recommend its acceptance: Paris L. Lambdin, B. Eugene Wofford Accepted for the Council: Carolyn R. -
13 SPOTTED KNAPWEED PEST STATUS of WEED Nature Of
In: Van Driesche, R., et al., 2002, Biological Control of Invasive Plants in the Eastern United States, USDA Forest Service Publication FHTET-2002-04, 413 p. 13 SPOTTED KNAPWEED J. Story Montana State University, Western Agricultural Research Center, Corvallis, Montana, USA runoff and soil sedimentation (Lacey et al., 1989), and PEST STATUS OF WEED lowers plant diversity (Tyser and Key, 1988). Spot- Spotted knapweed, Centaurea maculosa Lamarck, is ted knapweed produces an allelopathic compound a purple-flowered, herbaceous, perennial weed, liv- that reduces germination of some grass species ing three to five years on average. It infests semiarid (Kelsey and Locken, 1987). range lands in the western United States and road- Geographical Distribution sides and fields in the eastern part of the country. Infested areas are dominated by the plant, reducing Spotted knapweed is native to Europe and western their grazing value and suppressing native plant com- Asia but has become widespread in parts of the munities. The plant, originally from Central Asia, has United States and Canada. The plant occurs through- been in North America for over 120 years. out the United States except for Alaska, Texas, Okla- homa, Mississippi, and Georgia (USDA, NRCS, Nature of Damage 2001). The plant is a serious invader of rangeland in Economic damage. Spotted knapweed is a serious the Rocky Mountain region. In Montana alone, the problem on rangeland, especially in the western plant infests an estimated 1.9 million ha of rangeland United States. Bucher (1984) estimated that an and pasture (Lacey, 1989). In Canada, the plant is 800,000 ha infestation in Montana was causing $4.5 abundant in British Columbia, and is common in million in annual forage losses, and that invasion of Ontario, Quebec, and the Maritimes (Watson and 13.6 million ha of vulnerable rangeland in Montana Renney, 1974). -
Centaurea Stoebe)
Chapter 11 Sustainable Control of Spotted Knapweed (Centaurea stoebe) D.G. Knochel and T.R. Seastedt Abstract Spotted knapweed is native to Eastern Europe, with a locally scarce but widespread distribution from the Mediterranean to the eastern region of Russia. The plant is one of over a dozen Centaurea species that were accidentally introduced into North America and now is found in over 1 million ha of rangeland in the USA and Canada. Land managers spend millions of dollars annually in an attempt to control spotted knapweed and recover lost forage production, and meanwhile the plant perse- veres as a detriment to native biodiversity and soil stability. These ecological concerns have motivated intense scientific inquiry in an attempt to understand the important fac- tors explaining the unusual dominance of this species. Substantial uncertainty remains about cause–effect relationships of plant dominance, and sustainable methods to control the plant remain largely unidentified or controversial. Here, we attempt to resolve some of the controversies surrounding spotted knapweed’s ability to dominate invaded com- munities, and focus on what we believe is a sustainable approach to the management of this species in grasslands, rangelands, and forests. Application of both cultural and bio- logical control tools, particularly the concurrent use of foliage, seed, and root feeding insects, is believed sufficient to decrease densities of spotted knapweed in most areas to levels where the species is no longer a significant ecological or economic concern. Keywords Biological control • Biological invasions • Centaurea stoebe L. ssp micranthos • Centaurea maculosa • Knapweed • Sustainable management 11.1 Introduction Knapweeds and yellow starthistle, plants belonging to the genus Centaurea and the closely related genus Acroptilon, are members of the Asteraceae that were acciden- tally introduced into North America from Eurasia over a century ago. -
Field Cage Assessment of Interference Among Insects Attacking Seed Heads of Spotted and Diffuse Knapweed L
This article was downloaded by: [USDA National Agricultural Library] On: 18 September 2008 Access details: Access Details: [subscription number 731703660] Publisher Taylor & Francis Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer House, 37-41 Mortimer Street, London W1T 3JH, UK Biocontrol Science and Technology Publication details, including instructions for authors and subscription information: http://www.informaworld.com/smpp/title~content=t713409232 Field cage assessment of interference among insects attacking seed heads of spotted and diffuse knapweed L. Smith a; M. Mayer b a USDA-ARS, Western Regional Research Center, Albany, CA, USA b USDA-ARS, Northern Plains Agricultural Research Laboratory, Sidney, MT, USA Online Publication Date: 01 August 2005 To cite this Article Smith, L. and Mayer, M.(2005)'Field cage assessment of interference among insects attacking seed heads of spotted and diffuse knapweed',Biocontrol Science and Technology,15:5,427 — 442 To link to this Article: DOI: 10.1080/09583150400016902 URL: http://dx.doi.org/10.1080/09583150400016902 PLEASE SCROLL DOWN FOR ARTICLE Full terms and conditions of use: http://www.informaworld.com/terms-and-conditions-of-access.pdf This article may be used for research, teaching and private study purposes. Any substantial or systematic reproduction, re-distribution, re-selling, loan or sub-licensing, systematic supply or distribution in any form to anyone is expressly forbidden. The publisher does not give any warranty express or implied or make any representation that the contents will be complete or accurate or up to date. The accuracy of any instructions, formulae and drug doses should be independently verified with primary sources. -
Attack of Urophora Quadrifasciata (Meig.) (Diiptera: Tephritidae) a Biological Control Agent for Spotted Knapweed (Centaurea Maculosa Lamarck) and Diffuse Knapweed (C
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Valparaiso University The Great Lakes Entomologist Volume 36 Numbers 1 & 2 - Spring/Summer 2003 Numbers Article 4 1 & 2 - Spring/Summer 2003 April 2003 Attack of Urophora Quadrifasciata (Meig.) (Diiptera: Tephritidae) A Biological Control Agent for Spotted Knapweed (Centaurea Maculosa Lamarck) and Diffuse Knapweed (C. Diffusa Lamarck) (Asteraceae) by a Parasitoid, Pteromalus Sp. (Hymenoptera: Pteromalidae) in Michigan Ronald F. Lang United States Department of Agriculture Jane Winkler Michigan Department of Agriculture Richard W. Hansen United States Department of Agriculture Follow this and additional works at: https://scholar.valpo.edu/tgle Part of the Entomology Commons Recommended Citation Lang, Ronald F.; Winkler, Jane; and Hansen, Richard W. 2003. "Attack of Urophora Quadrifasciata (Meig.) (Diiptera: Tephritidae) A Biological Control Agent for Spotted Knapweed (Centaurea Maculosa Lamarck) and Diffuse Knapweed (C. Diffusa Lamarck) (Asteraceae) by a Parasitoid, Pteromalus Sp. (Hymenoptera: Pteromalidae) in Michigan," The Great Lakes Entomologist, vol 36 (1) Available at: https://scholar.valpo.edu/tgle/vol36/iss1/4 This Peer-Review Article is brought to you for free and open access by the Department of Biology at ValpoScholar. It has been accepted for inclusion in The Great Lakes Entomologist by an authorized administrator of ValpoScholar. For more information, please contact a ValpoScholar staff member at [email protected]. Lang et al.: Attack of <i>Urophora Quadrifasciata</i> (Meig.) (Diiptera: Tephr 16 THE GREAT LAKES ENTOMOLOGIST Vol. 36, Nos. 1 & 2 ATTACK OF UROPHORA QUADRIFASCIATA (MEIG.) (DIIPTERA: TEPHRITIDAE) A BIOLOGICAL CONTROL AGENT FOR SPOTTED KNAPWEED (CENTAUREA MACULOSA LAMARCK) AND DIFFUSE KNAPWEED (C.