Intraguild Predation on the Whitefly Parasitoid Eretmocerus Eremicus By
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Research Article Ecological Observations of Native Geocoris Pallens and G
Hindawi Publishing Corporation Psyche Volume 2013, Article ID 465108, 11 pages http://dx.doi.org/10.1155/2013/465108 Research Article Ecological Observations of Native Geocoris pallens and G. punctipes Populations in the Great Basin Desert of Southwestern Utah Meredith C. Schuman, Danny Kessler, and Ian T. Baldwin Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knoll-Straße¨ 8, 07745 Jena, Germany Correspondence should be addressed to Ian T. Baldwin; [email protected] Received 5 November 2012; Accepted 16 April 2013 Academic Editor: David G. James Copyright © 2013 Meredith C. Schuman et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Big-eyed bugs (Geocoris spp. Fallen,´ Hemiptera: Lygaeidae) are ubiquitous, omnivorous insect predators whose plant feeding behavior raises the question of whether they benefit or harm plants. However, several studies have investigated both the potential of Geocoris spp. to serve as biological control agents in agriculture and their importance as agents of plant indirect defense in nature. These studies have demonstrated that Geocoris spp. effectively reduce herbivore populations and increase plant yield. Previous work has also indicated that Geocoris spp. respond to visual and olfactory cues when foraging and choosing their prey and that associative learning of prey and plant cues informs their foraging strategies. For these reasons, Geocoris spp. have become models for the study of tritrophic plant-herbivore-predator interactions. Here, we present detailed images and ecological observations of G. pallens Stal˚ and G. -
A Comparative Study of Two Seed Bugs, Geocoris
A COMPARATIVE STUDY OF TWO SEED BUGS, GEOCORIS BULLATUS (SAY) AND G. DISCOPTERUS STAL (HEMIPTERA: LYGAEIDAE) IN THE YUKON. By JENNIFER J. ROBINSON B.Sc. Trent University, 1980 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE in THE FACULTY OF GRADUATE STUDIES DEPARTMENT OF ZOOLOGY We accept this thesis as conforming te trie required standard June, 1985 (c) Jennifer J. Robinson, 1985 In presenting this thesis in partial fulfilment of the requirements for an advanced degree at the University of British Columbia, I agree that the Library shall make it freely available for reference and study. I further agree that permission for extensive copying of this thesis for scholarly purposes may be granted by the head of my department or by his or her representatives. It is understood that copying or publication of this thesis for financial gain shall not be allowed without my written permission. Department of The University of British Columbia 1956 Main Mall Vancouver, Canada V6T 1Y3 )E-6 C3/81) Abstract Geocoris bullatus (Say 1831), (Henriptera: Lygaeidae) has been collected and studied across North America but the present work is the o first detailed study of western North American CL discopterus Stal 1874. In fact, it has been claimed that 6^. discopterus is solely a species of the east. As the two species are taxonomically difficult to separate, when they were apparently discovered together at several localities in the southwestern Yukon, a detailed investigation of their systematics and distribution seemed necessary. Species status of Yukon Q. bullatus and iG. -
Venoms of Heteropteran Insects: a Treasure Trove of Diverse Pharmacological Toolkits
Review Venoms of Heteropteran Insects: A Treasure Trove of Diverse Pharmacological Toolkits Andrew A. Walker 1,*, Christiane Weirauch 2, Bryan G. Fry 3 and Glenn F. King 1 Received: 21 December 2015; Accepted: 26 January 2016; Published: 12 February 2016 Academic Editor: Jan Tytgat 1 Institute for Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072, Australia; [email protected] (G.F.K.) 2 Department of Entomology, University of California, Riverside, CA 92521, USA; [email protected] (C.W.) 3 School of Biological Sciences, The University of Queensland, St Lucia, QLD 4072, Australia; [email protected] (B.G.F.) * Correspondence: [email protected]; Tel.: +61-7-3346-2011 Abstract: The piercing-sucking mouthparts of the true bugs (Insecta: Hemiptera: Heteroptera) have allowed diversification from a plant-feeding ancestor into a wide range of trophic strategies that include predation and blood-feeding. Crucial to the success of each of these strategies is the injection of venom. Here we review the current state of knowledge with regard to heteropteran venoms. Predaceous species produce venoms that induce rapid paralysis and liquefaction. These venoms are powerfully insecticidal, and may cause paralysis or death when injected into vertebrates. Disulfide- rich peptides, bioactive phospholipids, small molecules such as N,N-dimethylaniline and 1,2,5- trithiepane, and toxic enzymes such as phospholipase A2, have been reported in predatory venoms. However, the detailed composition and molecular targets of predatory venoms are largely unknown. In contrast, recent research into blood-feeding heteropterans has revealed the structure and function of many protein and non-protein components that facilitate acquisition of blood meals. -
Biological Control of Insect Pests in the Tropics - M
TROPICAL BIOLOGY AND CONSERVATION MANAGEMENT – Vol. III - Biological Control of Insect Pests In The Tropics - M. V. Sampaio, V. H. P. Bueno, L. C. P. Silveira and A. M. Auad BIOLOGICAL CONTROL OF INSECT PESTS IN THE TROPICS M. V. Sampaio Instituto de Ciências Agrária, Universidade Federal de Uberlândia, Brazil V. H. P. Bueno and L. C. P. Silveira Departamento de Entomologia, Universidade Federal de Lavras, Brazil A. M. Auad Embrapa Gado de Leite, Empresa Brasileira de Pesquisa Agropecuária, Brazil Keywords: Augmentative biological control, bacteria, classical biological control, conservation of natural enemies, fungi, insect, mite, natural enemy, nematode, predator, parasitoid, pathogen, virus. Contents 1. Introduction 2. Natural enemies of insects and mites 2.1. Entomophagous 2.1.1. Predators 2.1.2. Parasitoids 2.2. Entomopathogens 2.2.1. Fungi 2.2.2. Bacteria 2.2.3. Viruses 2.2.4. Nematodes 3. Categories of biological control 3.1. Natural Biological Control 3.2. Applied Biological Control 3.2.1. Classical Biological Control 3.2.2. Augmentative Biological Control 3.2.3. Conservation of Natural Enemies 4. Conclusions Glossary UNESCO – EOLSS Bibliography Biographical Sketches Summary SAMPLE CHAPTERS Biological control is a pest control method with low environmental impact and small contamination risk for humans, domestic animals and the environment. Several success cases of biological control can be found in the tropics around the world. The classical biological control has been applied with greater emphasis in Australia and Latin America, with many success cases of exotic natural enemies’ introduction for the control of exotic pests. Augmentative biocontrol is used in extensive areas in Latin America, especially in the cultures of sugar cane, coffee, and soybeans. -
Predation of the Chinch Bug, Blissus Occiduus Barber (Hemiptera: Blissidae) by Geocoris Uliginosus (Say) (Hemiptera: Lygaeidae)
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Faculty Publications: Department of Entomology Entomology, Department of 2008 Predation of the Chinch Bug, Blissus occiduus Barber (Hemiptera: Blissidae) by Geocoris uliginosus (Say) (Hemiptera: Lygaeidae) J. D. Carstens University of Nebraska-Lincoln Frederick P. Baxendale University of Nebraska-Lincoln, [email protected] Tiffany Heng-Moss University of Nebraska-Lincoln, [email protected] Robert J. Wright University of Nebraska, [email protected] Follow this and additional works at: https://digitalcommons.unl.edu/entomologyfacpub Part of the Entomology Commons Carstens, J. D.; Baxendale, Frederick P.; Heng-Moss, Tiffany; and Wright, Robert J., "Predation of the Chinch Bug, Blissus occiduus Barber (Hemiptera: Blissidae) by Geocoris uliginosus (Say) (Hemiptera: Lygaeidae)" (2008). Faculty Publications: Department of Entomology. 157. https://digitalcommons.unl.edu/entomologyfacpub/157 This Article is brought to you for free and open access by the Entomology, Department of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Faculty Publications: Department of Entomology by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. JOURNAL OF THE KANSAS ENTOMOLOGICAL SOCIETY 81(4), 2008, pp. 328–338 Predation of the Chinch Bug, Blissus occiduus Barber (Hemiptera: Blissidae) by Geocoris uliginosus (Say) (Hemiptera: Lygaeidae) J. D. CARSTENS,F.P.BAXENDALE,T.M.HENG-MOSS, AND R. J. WRIGHT Department of Entomology, University of Nebraska-Lincoln, Lincoln, NE 68583 ABSTRACT: Big-eyed bugs have been well documented as predators on a diverse group of arthropod prey in turfgrasses; however, little is known about the big-eyed bug species associated with buffalograss, or their feeding habits relative to the western chinch bug, Blissus occiduus Barber. -
High Tunnel Pest Management - Aphids
Published by Utah State University Extension and Utah Plant Pest Diagnostic Laboratory ENT-225-21-PR March 2021 High Tunnel Pest Management - Aphids Nick Volesky, Vegetable IPM Associate • Zachary Schumm, Arthropod Diagnostician Winged Aphids Quick Facts • Aphids are small, pear-shaped insects with Thorax green; no abdominal Thorax darker piercing-sucking mouthparts that feed on plant dorsal markings; large (4 mm) than abdomen tissue. They can be found inside high tunnels all season long. • Various species of aphids have a broad host range and can vector several viruses. Potato Aphid Therefore, management in high tunnels can be Macrosipu euphorbiae challenging. • Monitor for aphids in high tunnels by visually inspecting plants for colonies and feeding symptoms. Irregular patch on No abdominal patch; dorsal abdomen; abdomen light to dark • Aphids can be managed in high tunnels through antennal tubercles green; small (<2 mm) cultural, mechanical, biological, and chemical swollen; medium to practices. large (> 3 mm) phids are a common pest that can be found on high Atunnel crops such as fruits, vegetables, ornamentals, Melon Cotton Aphid grasses, and weeds. Four aphid species commonly Aphis gossypii Green Peach Aphid found in Utah in high tunnels are green peach aphid Myzus persicae (Myzus persicae), melon aphid (Aphis gossypii), potato Wingless Aphids aphid (Macrosiphum euphorbiae), and cabbage aphid (Brevicoryne brassicae) (Fig. 1). Cornicles short (same as Cornicles longer than cauda); head flattened; small cauda; antennal insertions (2 mm), rounded body DESCRIPTION developed; medium to large (> 3mm) Aphids are small plant feeding insects in the order Hemiptera (the “true bugs”). Like all true bugs, aphids Melon Cotton Aphid have a piercing-sucking mouthpart (“proboscis”) that Aphis gossypii is used for feeding on plant structures. -
Geocoris Punctipes</Emphasis>
EntomoL exp. appl. 64: 195-202, 1992. 1992 Kluwer Academic Pubhshers. Printed & Belgium. 195 Geocoris punctipes as a predator of Bemisia tabaci: a laboratory evaluation A. C Cohen I & D. N. Byrne2 1 U.S. Department of Agriculture, Agr&ultural Research Service Western Cotton Research Laboratory, 4135 E. Broadway Rd., Phoenix, AZ 85040, USA; 2Department of Entomology, University of Arizona, Tucson, AZ 85721, USA Accepted: February 28, 1989 Key words: Geocoris, Bemisia, predator, handling time Abstract Geocoris punctipes (Say), a predaceous lygaeid not previously documented as a whitefly predator, was tested in the laboratory as a natural enemy of the sweet potato whitefly, Bemisia tabaci (Genn.). Its stalking behavior with whiteflies as prey was similar to that observed with aphids. A previously unob- served behavior was noted that involves the predators using salivary secretions to fasten the wings of prey to various surfaces, allowing labial probing and feeding. Prey consumption as a function of prey number appeared to follow the pattern of the Holling type II functional response. Handling time per prey item ranged from about 180 to 240 seconds. No changes were observed in handling time devoted to earlier versus later catches. Nutritional quality of whiteflies was measured using crude protein, lipids and carbohydrates as criteria. Performance, in terms of predator behavior, total daily handling time, func- tional response, energy budget and nutritional quality all support the hypothesis that G. punctipes is a promising candidate for biological control of sweet potato whiteflies. Introduction with photosynthesis (Perkins, 1983). These facts indicate a great need for effective control strate- The sweet potato whitefly, Bemisia tabaci (Genn.) gies. -
Beneficial Insects: True Bugs Erin W
Published by Utah State University Extension and Utah Plant Pest Diagnostic Laboratory ENT-111-07 November 2007 Beneficial insects: true bugs Erin W. Hodgson Ron Patterson Extension Entomology Specialist Carbon County Extension What You Should Know • True bugs are fluid feeding insects that suck out juices from plants and animals. • Nymphs and adults feed on the same prey, especially soft-bodied insects like aphids and caterpillars. • Predatory true bugs are usually not host-specific, meaning they do not have a preference for feeding on certain prey. Fig. 2. Bee assassin bug adult.2 rue bugs have piercing-sucking mouthparts (Fig. ) and belong to the order Hemiptera and suborder True Bug Life Cycle THeteroptera. There are more than 38,000 species of true bugs, and are most closely related to aphids, True bugs, and all Hemipterans, go through simple or cicadas, and leaf hoppers. Although some true bugs incomplete metamorphosis. Males and females will are considered pests, about one-third are predaceous. mate end-to-end (Fig. 3), or facing away from each True bugs have forewings, or hemelytra, that cross over other. Mated females lay eggs singly or in small masses the back at rest, but sometimes the wings are reduced near potential food sources. Nymphs hatch from the (Figs. -3). Hemelytra are hardened at the base and eggs and begin to search for small prey items. Nymphs membranous near the end. A triangular patch between look similar to the adults except they are smaller in size the forewings is usually noticeable. True bugs have and lack functional wings; nymphs will develop wing 5-segmented antennae and scent glands. -
From Museum Specimen Database to Ecological Statement
From Museum Specimen Database to Ecological Statement Christine A. Johnson1, Richard K. Rabeler2, Charles Bartlett3 © Tom Murray @Rob Naczi © Tom Murray 2 1 3 SPNHC – Cardiff - 2014 Tri-trophic Digitization Thematic Collections Network PI: Randall“Toby” Schuh (AMNH) 32 institutions: 18 insect collections, 14 herbaria NYBG is lead on botanical digitization, AMNH on entomological MAINE OSAC MIN UMEC CUIC MICH NY WIS EMC AMNH ISC CMNH CDFA INHS UDCC EMEC ILL CSUC MU CAS ILLS SEMC COLO MO UKIC KANU NCSU UCRC MEM Herbaria TEX Insect Collections TAMU BPBM Goals Plants Image and database 1.26M specimens from 20 families of vascular plants Unify these with 3.5M specimens from 3 data providers Mobilize total of 6.06M specimens Bugs Database 1.16M specimens from 92 families of Hemiptera Unify these with .38M specimens from 3 data providers Image selected specimens Parasitoids Database 45K specimens from 5 families of Hymenoptera Integrate trophic levels (7.65M records) in Discover Life Progress on Goals Start of Year 4 Botany: (currently at NY) 1,003 M images (79% of expected) data capture and georeferencing varies from skeletal to complete Insects + Parasitoids: 825K records completed (73.3% of expected) Happening Just Last Week Utilization of Collection Data Workshop UC-Riverside, June 17-18, 2014 data-mining and species distribution modeling use Tri-trophic Database as platform targeted to systematists and ecologists From Museum Specimen Database to Ecological Statement: Data Quality Inspection From Museum Specimen Database -
A B C D E F G
8/2011! A jee•AH•kor•is, Big-eyed Bugs Have Big Appetite for Pests Peter Asiimwe, Lydia Brown, Tim Vandervoet, Peter Ellsworth (University of Arizona) & Steven Naranjo (USDA-ARS, ALARC) Dykinga Geocoris punctipes Geocoris (Family: Geocoridae) are important predators feeding on whiteflies found throughout the United States in agricultural crops. USDA, Jack They are commonly known as “big-eyed bugs” due to the B C Eyespots on characteristic large, prominent, widely separated eyes on maturing the sides of their heads (A). They actively hunt their Geocoris egg victims, and their big eyes give them a wide field of vision and boost their ability to locate prey. Geocoris use a long Whitefly straw-like beak to stab and kill their prey before sucking up cadaver fed on & evacuated by the liquefied contents, leaving behind a hollow cadaver (B). Geocoris Geocoris deposit eggs singly and horizontally on leaf or Geocoris D E pallens adult stem surfaces. These hot-dog shaped eggs are distinguished on cotton from other insect eggs by the presence of two red eyespots flower False chinch near the tip (C). Predatory stages include five nymphal bug in instars and a winged adult. Nymphs look similar to adults sweepnet but are smaller and lack wings. False chinch bugs, a closely related insect with decidedly plant-feeding tendencies, can sometimes be confused with Geocoris (D). They are more slender than big-eyed bugs and have less pronounced eyes. F Geocoris In Arizona cotton, Geocoris feed on all stages of whitefly, th punctipes 5 instar adult Lygus nymphs, thrips, lepidopteran eggs and small larvae, Lygus and mites, as well as other beneficial species. -
Insect Classification Standards 2020
RECOMMENDED INSECT CLASSIFICATION FOR UGA ENTOMOLOGY CLASSES (2020) In an effort to standardize the hexapod classification systems being taught to our students by our faculty in multiple courses across three UGA campuses, I recommend that the Entomology Department adopts the basic system presented in the following textbook: Triplehorn, C.A. and N.F. Johnson. 2005. Borror and DeLong’s Introduction to the Study of Insects. 7th ed. Thomson Brooks/Cole, Belmont CA, 864 pp. This book was chosen for a variety of reasons. It is widely used in the U.S. as the textbook for Insect Taxonomy classes, including our class at UGA. It focuses on North American taxa. The authors were cautious, presenting changes only after they have been widely accepted by the taxonomic community. Below is an annotated summary of the T&J (2005) classification. Some of the more familiar taxa above the ordinal level are given in caps. Some of the more important and familiar suborders and families are indented and listed beneath each order. Note that this is neither an exhaustive nor representative list of suborders and families. It was provided simply to clarify which taxa are impacted by some of more important classification changes. Please consult T&J (2005) for information about taxa that are not listed below. Unfortunately, T&J (2005) is now badly outdated with respect to some significant classification changes. Therefore, in the classification standard provided below, some well corroborated and broadly accepted updates have been made to their classification scheme. Feel free to contact me if you have any questions about this classification. -
Kaytora Long
Journal of Undergraduate Research Volume 8, Issue 1 - September / October 2006 Evaluation of Various Mediums for Rearing Bigeyed Bugs Geocoris punctipes (Say) a Beneficial Predator for Controlling Insect Pest Populations Kaytora Long ABSTRACT The bigeyed bug, Geocoris punctipes (Say), is an important beneficial predator in many agricultural systems. It feeds on many stages of insect pests. Three types of mediums were evaluated on Geocoris punctipes to determine which medium will best promote ovipostion (egg laying) and the development of G. punctipes to nymphs and adults. The three mediums evaluated were cotton balls, cotton squares, and polyester/rayon gauze. The experimental design was completely randomized with four replicates per treatment (medium). The results indicate that cotton balls produced the highest number of eggs, nymphs, and adults. This can serve as a rearing material in which G. punctipes will successfully reproduce and develop; therefore, facilitating the rearing of G. punctipes under laboratory conditions. INTRODUCTION Bigeyed bugs, Geocoris spp., are commonly used for biological control of key agricultural pests in Integrated Pest Management (IPM) programs in the United States. There are several species of Geocoris; however, one of the most common species is G. punctipes (Say). Geocoris spp. feed on all life stages of whiteflies, mites, and aphids (Hagler 2006) and are used for their predatory status on eggs and small larvae of lepidopteran pests. Several studies indicate that G. punctipes are effective predators of insect pests in many agricultural systems (Dumas et al. 1962, McCutcheon & Durant 1999). Geocoris spp. can be produced in large quantities under laboratory conditions, yet information pertaining to their choice of reproductive mediums is unavailable.