background preloader

Actualités anglophones

Facebook Twitter

ECOLOGICAL SOCIETY OF AMERICA 04/08/16 Explicit modeling of abiotic and landscape factors reveals precipitation and forests associated with aphid abundance.

Résumé traduit : L'objectif de cette étude était de tenir compte explicitement de la contribution de la température et des précipitations, en plus de la composition du paysage, à l'abondance d'un insecte nuisible répandu dans les cultures, le puceron du soja (Aphis glycines Matsumura), dans les champs de soja du Wisconsin. Nous avons émis l'hypothèse qu'une plus grande abondance de pucerons du soja serait associée à une accumulation de chaleur plus élevée (p. Ex., Degrés-jours de croissance) et à une augmentation de l'habitat non cultivé dans le paysage environnant, en raison de la présence des principaux hôtes hivernants du puceron du soja. Sur cette vaste étendue spatiale et temporelle au Wisconsin, nous avons constaté que la variation des précipitations pendant la saison de croissance était positivement liée à l'abondance du puceron du soja, tandis que des précipitations plus élevées pendant la saison de non-croissance avaient un effet négatif sur les populations de pucerons. De plus, nous avons constaté que les populations de pucerons étaient plus élevées dans les zones où la forêt était proportionnellement plus importante, mais étaient plus faibles dans les zones où les cultures mineures, comme les petites céréales, étaient plus répandues. Ainsi, nos résultats soutiennent notre hypothèse selon laquelle l'inclusion des moteurs abiotiques augmente notre compréhension de l'abondance et de la distribution des ravageurs des cultures. De plus, en modélisant explicitement les facteurs abiotiques, nous pouvons être en mesure d'explorer comment le climat variable en tandem avec les modèles de couverture terrestre peut affecter les populations d'insectes actuelles et futures, avec des implications potentiellement critiques pour les rendements des cultures et les réseaux trophiques agricoles. – guatemalt

Florida Entomological Society - 2020 - Effects of Temperature on Survival, Development, and Reproduction of Aphis glycines (Hemiptera: Aphididae) Autumnal Morphs.

Résumé traduit : Cette étude fournit des informations importantes sur la survie, le développement et la reproduction de morphes automnales d'A. glycines, ce qui est utile pour comprendre la dynamique des populations et le cycle de vie d'A. glycines en automne, et pour étudier l'adaptabilité écologique d'A. glycines en automne. – guatemalt

Ecological Modelling 254 (2013) 54– 70 A mechanistic model for a tritrophic interaction involving soybean aphid, its host plants, and multiple natural enemies. JOURNAL OF ECONOMIC ENTOMOLOGY 29/11/19 Detection of Stress Induced by Soybean Aphid (Hemiptera: Aphididae) Using Multispectral Imagery from Unmanned Aerial Vehicles. We use cookies to enhance your experience on our website.

JOURNAL OF ECONOMIC ENTOMOLOGY 29/11/19 Detection of Stress Induced by Soybean Aphid (Hemiptera: Aphididae) Using Multispectral Imagery from Unmanned Aerial Vehicles

By clicking 'continue' or by continuing to use our website, you are agreeing to our use of cookies. You can change your cookie settings at any time. We use cookies to enhance your experience on our website.By continuing to use our website, you are agreeing to our use of cookies. You can change your cookie settings at any time. <a href=" Find out more</a> Skip to Main Content Sign In Register. UMN_EDU 09/04/19 2020-21 Rapid Ag: Insecticide Resistance Management for Soybean Aphid: Understanding Biological Mechanisms and Grower Practices. Robert Koch Department Entomology The Problem Soybean aphid, an invasive species from Asia, is the most significant insect pest of soybean in Minnesota and the U.S.

UMN_EDU 09/04/19 2020-21 Rapid Ag: Insecticide Resistance Management for Soybean Aphid: Understanding Biological Mechanisms and Grower Practices

ECOLOGICAL SOCIETY OF AMERICA - SEPT 2014 - Reduced wind strengthens top-down control of an insect herbivore. UNIVERSITY OF MINNESOTA EXTENSION via YOUTUBE 27/12/17 Steps for recuding the soybean aphid. UMNMITPPC VIA YOUTUBE 04/12/17 Soybean Aphid: A game changer in soybean production and the role of buckthorn, Robert Koch. MORNING AG CLIPS 05/07/18 Second edition of Soybean Aphid Field Guide. Soybean aphids infesting a soybean plant.

MORNING AG CLIPS 05/07/18 Second edition of Soybean Aphid Field Guide

For many farmers in the north central region, soybean aphid is the primary soybean insect pest and can be costly to manage, especially if pyrethroid-resistant. (Courtesy of ISU Extension and Outreach) AMES, Iowa — The second edition of the “Soybean Aphid Field Guide” is now available for free PDF download through the Iowa State University Extension Store. A physical copy soon will be available for purchase through the Store and through the North Central Soybean Research Program. The second edition revisits the 2013 guide and encompasses 62 pages complete with updated photos and graphics for soybean aphid management.

While the guide includes updated information on soybean aphid, new to the guide is a decision-making flowchart. “The Soybean Aphid Field Guide is a valuable resource for farmers and crop consultants that want to learn more about this economic pest,” said Erin Hodgson, associate professor and extension specialist in entomology. J Econ Entomol. 2017 Oct 1; Economic Injury Levels for Aphis glycines Matsumura (Hemiptera: Aphididae) on the Soybean Aphid Tolerant KS4202 Soybean. Aphis glycines as a Vector of Persistently and Nonpersistently Transmitted Viruses and Potential Risks for Soybean and Other Crops. APS - JULY 2006 - Aphis glycines as a Vector of Persistently and Nonpersistently Transmitted Viruses and Potential Risks for Soybean and Other Crops.

Aphid populations continue to increase, especially in southern Minnesota where we are seeing more fields surpassing threshold levels and requiring treatment to protect soybean yield.

APS - JULY 2006 - Aphis glycines as a Vector of Persistently and Nonpersistently Transmitted Viruses and Potential Risks for Soybean and Other Crops

Late-season management of soybean aphids can be challenging. In this article, I provide some considerations for scouting and making management decisions for soybean aphid in the later part of the growing season. How much longer do you need to keep scouting? What densities of aphids should (or should not) be treated with insecticide? What about later growth stages? UMNMITPPC VIA YOUTUBE 30/11/16 History of soybean aphid invasion and chemical controls. REAL AGRICULTURE via YOUTUBE 18/08/17 Soybean School: Taking a closer look at soybean aphid thresholds. IGROW 18/08/17 Soybean Aphid Populations Reaching and Exceeding Thresholds. Figure 1.

IGROW 18/08/17 Soybean Aphid Populations Reaching and Exceeding Thresholds

Soybean aphid colony. Credit: A. Varenhorst Written collaboratively by Adam Varenhorst, Patrick Wagner, and Amanda Bachmann. PEST MANAGEMENT SCIENC 04/07/17 Assessing the value and pest management window provided by neonicotinoid seed treatments for management of soybean aphid (Aphis glycines Matsumura) in the Upper Midwestern United States. ILSOY ADVIRSOR 22/08/17 Soybean Aphid Making Their Presence Known. Published on 22 Aug 2017, 08:00 AM • by: Christian Krupke and John Obermeyer, Purdue Cooperative Extension • 210 Views This article was originally posted by the Purdue Cooperative Extension.

ILSOY ADVIRSOR 22/08/17 Soybean Aphid Making Their Presence Known

Numbers vary considerably from field to field.Recent cooler temperatures favored aphid development.Treatment threshold and application guidelines given below. Soybean aphids have begun to show up in a few northern Indiana soybean fields, some are reportedly over threshold. Because of the tremendous variability in aphid numbers from field to field, diligent scouting NOW can pay big dividends. Aphids are relatively easy to scout for, identify and (for now at least) can be readily controlled using a variety of relatively inexpensive insecticides. Sampling: Count aphids, primarily on the undersides of leaves, on at least 20 plants (the more, the better) in various areas of the field.

Biological Invasions 09/08/17 Effect of the spatial context along the invasion process: “Hierarchical spatial” or “Host-switching spatial” hypotheses? MANITOBA CO-OPERATOR 29/05/17 U.S. study questions neonics for soybean aphid control. A multi-university study says that neonicotinoid insecticide seed treatments have little effect on soybean aphid populations, as the pesticide has disappeared in plant tissue by the time the aphids arrive.

MANITOBA CO-OPERATOR 29/05/17 U.S. study questions neonics for soybean aphid control

The two-year study was a joint effort of Purdue University, Iowa State University, Kansas State University, North Dakota State University, the University of Minnesota, South Dakota State University and the University of Wisconsin. It examined the effectiveness of neonicotinoids (also known as neonics) on soybean aphid control, compared to an Integrated Pest Management (IPM) approach, over multiple states. “We knew most growers were using neonicotinoids and we knew that the biggest soybean pest is aphids,” says Christian Krupke, a professor of entomology at Purdue University and one of the researchers who worked on the study. The research found that the neonic seed treatments were no longer having any effect by the time soybean aphids reached threshold levels. PLANT HEALTH PROGRESS 13/12/16 Biology and Economics of Recommendations for Insecticide-Based Management of Soybean Aphid.

UNIVERSITY OF DELAWARE 25/08/17 Soybean Aphid Populations Starting to Increase in Soybeans. Bill Cissel, Extension Agent – Integrated Pest Management; bcissel@udel.edu Soybean aphids are starting to show up in soybeans.

UNIVERSITY OF DELAWARE 25/08/17 Soybean Aphid Populations Starting to Increase in Soybeans

Populations are still extremely low in many fields but populations can quickly explode, especially with the cooler temperatures. The soybean aphid is small (less than 1/16” in length), yellow in color, with black cornicles (the dual tail pipes coming out the back end). A hand lens will be necessary to see the cornicles which can be used a key characteristic to distinguish aphids from other small insects. AGFAX 31/08/17 Iowa Soybeans: When Is It Too Late to Treat for Soybean Aphid? I’m getting a lot of questions regarding treatment timing for soybean aphid.

AGFAX 31/08/17 Iowa Soybeans: When Is It Too Late to Treat for Soybean Aphid?

Mainly, when is it too late to treat? In the last week of August 2017, most fields are reaching R5/R6 and so the question is an important one. In my soybean aphid efficacy evaluation, I have sprayed at different plant growth stages to evaluate yield responses. I have never been able to demonstrate a yield response when spraying after R5.5. AGFAX 31/08/17 Iowa Soybeans: Why Use the Economic Threshold for Soybean Aphid? The economic threshold of 250 soybean aphids per plant, with more than 80% of plants infested and aphid populations increasing was published in 2007 to prevent populations from reaching the EIL.

AGFAX 31/08/17 Iowa Soybeans: Why Use the Economic Threshold for Soybean Aphid?

These values were determined by closely monitoring aphid populations in research plots. It has been nearly a decade since the current threshold was developed and published, and University research continues to support these values. However, some have questioned the continued validity of the original soybean aphid ET that used data from the mid-2000s. Calculations performed using current economic conditions (which are different now), but without regard to biology (which has not changed) may suggest that a lower ET should be used for aphid management.

Aphid biology and how the plant reacts to aphids make the exercise meaningless. AGFAX 18/07/17 South Dakota Soybeans: New Insecticide Labeled for Soybean Aphid Management. This year, soybean aphids have the potential to reach population densities that exceed the economic threshold of 250 aphids per plant. It is likely that insecticides will be applied to many soybean fields to prevent yield loss. AGFAX 14/06/17 South Dakota: 1st Soybean Aphid Populations Detected. Soybean aphid populations were fairly sparse in 2016; however, some fields still reached the 250 threshold and were sprayed. Historically, soybean aphids tend to be more of an issue during odd numbered years. Soybean aphids may be more of an issue in 2017 as a result. While scouting fields this week, we observed winged (alate) soybean aphids in Southeast South Dakota. Although no sustained populations were observed, it is a good reminder that soybean aphid scouting should occur throughout the growing season to prevent population outbreaks.

UNIVERSITY OF NEBARSKA-LINCOLN 17/07/17 Although at Low Levels, Soybean Aphids Are in Northeast Nebraska. Also see the companion article, Soybean Aphid Scouting and Management, in this week's CropWatch. Although it has been too hot for soybean aphids to thrive, we are beginning to see them in northeast Nebraska soybean fields, albeit at extremely low levels.

The infestations appear to have occurred fairly recently, as the aphids were only observed on leaves that had not yet expanded completely. One could consider many fields to be “seeded” with soybean aphid, and if (or maybe we should say when) temperatures decline, we could see soybean aphid populations increase significantly. In past years we have monitored soybean fields that were almost devoid of aphids in mid-July grow to well over 2000 aphids per plant by mid-August. It’s time to review soybean aphid biology and management, and if you have not started to scout for aphids, start now. THE FARMER 23/05/17 Growers sought for soybean aphid-buckthorn research. University of Minnesota researchers are in the process of reaching out to soybean growers across the state who may be interested in volunteering to participate in a research study on soybean aphid population levels and buckthorn density.

Soybean aphids have become one of the most damaging pests of soybeans in the Great Lakes region, negatively impacting soybean yields and quality. While there are numerous options for managing soybean aphids — from aphid-resistant soybean varieties, to insecticides and predatory insects — these treatments focus solely on the field. In spring, eggs hatch and several generations of aphids are produced without mating, according to Bob Koch, U-M Extension entomologist . Winged aphids are eventually produced on buckthorn, which then fly to soybean fields. Numerous generations of both winged and wingless aphids are produced on soybean without mating during the summer. “We’re looking for at least 30 farmers who will participate,” she says. Insect Biochem Mol Biol. 2017 Jan 22. Whole genome sequence of the soybean aphid, Aphis glycines. <div pearltreesdevid="PTD140" role="alert" class="alert-message-container"><div pearltreesdevid="PTD141" aria-hidden="true" class="alert-message-body"><span pearltreesdevid="PTD142" style="display: inline-block;" class="Icon IconAlert"><svg pearltreesDevId="PTD143" style="width: 100%; height: 100%;" width="24" height="24" focusable="false" tabindex="-1" fill="currentColor"><path pearltreesDevId="PTD144" fill="#f80" d="M11.84 4.63c-.77.05-1.42.6-1.74 1.27-1.95 3.38-3.9 6.75-5.85 10.13-.48.83-.24 1.99.53 2.56.7.6 1.66.36 2.5.41 3.63 0 7.27.01 10.9-.01 1.13-.07 2.04-1.28 1.76-2.39-.1-.58-.56-1.02-.81-1.55-1.85-3.21-3.69-6.43-5.55-9.64-.42-.52-1.06-.83-1.74-.79z"></path><path pearltreesDevId="PTD145" d="M11 8h2v5h-2zM11 14h2v2h-2z"></path></svg></span><!

-- react-text: 58 -->JavaScript is disabled on your browser. Please enable JavaScript to use all the features on this page. <! UMN_EDU 21/07/17 Soybean aphid infestations and reports of failures of pyrethroid insecticides to control soybean aphid. Robert Koch (Extension Entomologist), Ian MacRae (Extension Entomologist), Bruce Potter (Extension IPM Specialist), and Phil Glogoza (Extension Educator – Crops) SUCCESSFUL FARMING 15/08/16 Make No Soybean Aphid Assumptions - Even if your fields have low populations so far, keep scouting. In many fields this year, soybean aphids have been a no-show. However, that’s not the case everywhere, says Bruce Potter, University of Minnesota (U of M) Extension integrated pest management specialist. He says fields at the U of M Southwest Research and Outreach Center near Lamberton have experienced aphid infestations.

SOCIETY FOR SOYBEAN RESEARCH (Madhya Pradesh, India - 2014 - Volume 2. SOCIETY FOR SOYBEAN RESEARCH (Madhya Pradesh, India - 2014 - Volume 1. Genetics and Molecular Research 13 (4): 9152-9160 (2014) Mapping an aphid resistance gene in soybean [Glycine max(L.) Merr.] P746. UNIVERSITY OF WISCONSIN-EXTENSION 25/07/16 Poster : Managing Late-Season Soybean Aphids. IOWA STATE UNIVERSITY - 2013 - Dissertation en ligne : An investigation of soybean aphid ecology and management in the context of agricultural sustainability. JOURNAL OF ECONOMIC ENTOMOLOGY - 2015 - Soybean Aphid (Hemiptera: Aphididae) Affects Soybean Spectral Reflectance. JOURNAL OF ECONOMIC ENTOMOLOGY 24/03/16 Population Dynamics of the Soybean Aphid (Hemiptera: Aphididae) in Quebec (Canada)

University of Manitoba VIA YOUTUBE 18/07/16 Soybean School: Refining the Soybean Aphid Threshold to Factor in Friendly Bugs. UNIVERSITY OF MINNESOTA - 2016 - Promoting Sustainable Biological Control of the Soybean Aphid by Examining the Effect of Biodiversity on Releases of the Parasitoid Wasp Aphelinus glycinis. UNIVERSITY OF MINNESOTA 27/03/16 Soybean Aphid in Minnesota Soybean. ONTARIO SOIL CROP - JUILLET 2015 - Biological Control of the Soybean Aphid, Aphis glycines.

ACSESS 03/12/15 Sources of Soybean Aphid Resistance in Early-Maturing Soybean Germplasm. Journal of Entomological Science Apr 2016 Density-Dependent Responses of Natural Enemies to Soybean Aphid (Hemiptera: Aphididae) Populations. UNIVERSITY OF MINNESOTA 18/07/16 Just the facts: A review of the biology and economics behind soybean aphid insecticide recommendations.

UNIVERSITY OF MINNESOTA 22/08/16 MINNESOTA CROP NEWS - Some things to consider with late-season soybean aphid insecticide applications. CROP SCIENCE - NOV-DEC 2015 - Geographic Distribution of Soybean Aphid Biotypes in the United States and Canada during 2008–2010. UNIVERSITY OF NEBRASKA - OCT 2011 - Soybean aphid management in Nebraska. Journal of Economic Entomology, Volume 105, Number 1, Pages 1-296 2012 Spatial Distribution of Aphis glycines (Hemiptera: Aphididae): A Summary of the Suction Trap Network. Recherche avancée Scholar Recherche avancée Articles contenant. UNIVERSITY OF MINNESOTA - 2011 - Foliar applied insecticide control of the Soybean Aphid (2011) USDA - SEPT 2012 - Field Release of Aphelinus glycinis (Hymenoptera: Aphelinidae) for Biological Control of the Soybean Aphid, A. Ecological Modelling 254 (2013) 54– 70 A mechanistic model for a tritrophic interaction involving soybean aphid, its host plants.

Ecological Modelling 254 (2013) 54– 70 A mechanistic model for a tritrophic interaction involving soybean aphid, its host plants, and multiple natural enemies – guatemalt

FIELD AND FORAGE CROPS - DEC 2013 - Effects of Thiamethoxam Seed Treatments on Soybean Aphid (Hemiptera: Aphididae) Feeding Beha. Insect Sci. 2014 Jun;21(3):342-51.Seasonal occurrence of Aphis glycines and physiological responses of soybean plants to its fee.

Insect Sci. 2014 Jun;21(3):342-51.Seasonal occurrence of Aphis glycines and physiological responses of soybean plants to its feeding. – guatemalt

Crop Science 04/07/14 Biotypic variation among soybean aphid (Aphis glycines) isolates 1 from four provinces 2 in China in 2011. SOUTH DAKOTA STATE UNIVERSITY 29/07/13 Soybean aphid scouting and management. IOWA STATE UNIVERSITY - 2013 - Présentation : Proceedings of the 2013 crop pest management - Integrating soybean aphid and soybe. Journal of Applied Entomology Volume 138, Issue 7, pages 475–484, August 2014 Comparison of sampling methods of Aphis glycines p.

Journal of Applied Entomology Volume 138, Issue 7, pages 475–484, August 2014 Comparison of sampling methods of Aphis glycines predators across the diel cycle – guatemalt

Journal of Applied Entomology Volume 138, Issue 7, pages 485–489, August 2014 Real-time PCR for identification of the soybean ap. EUPHYTICA - 2012 - Resistance and virulence in the soybean-Aphis glycines interaction. Entomological Society of America - 2010 - Seasonal Phenology of Aphis glycines (Hemiptera: Aphididae) and Other Aphid Species in. Advanced Materials Research (Volumes 393 - 395) NOV 2011 Research on Resistance of Aphis Glycines in Hei Longjiang Province. Peer Reviewed Journal 23/03/12 Resistance and virulence in the soybean-Aphis glycines interaction. IOWA STATE UNIVERSITY - 2010 - Local and regional approaches to studying the phenology and biological control of the soybean aph.