Mary Corp

Former

Biography

Mary is an Emeritus Professor with Oregon State University Department of Crop and Soil Science and has been with OSU since 1998. Mary is involved in Dryland Cropping Systems research and is Director of the Columbia Basin Agricultural Research Center near Pendleton, Oregon. Her work focuses on soil conservation, cereal variety selection, insect pests and weeds in small grains.

Content by Mary Corp

Cereal leaf beetles pose threat to grain crops

The cereal leaf beetle attacks grain crops and damages both plant vigor and grain quality. Sporadic outbreaks in Oregon counties in recent years might be an indication that biocontrol is failing.

Mary Corp, Navneet Kaur | Jan 2024 | Article

Field crop plant health challenges

This collection offers a thorough examination of the hurdles that plants confront, highlighting a varied group of challenges in agricultural and natural environments. Explore the fundamentals of plant health by delving into topics ...

Mary Corp | Jan 2024 | Collection

Winter Wheat in Continuous Cropping Systems (High Precipitation Zone) Fertilizer Guide

Addresses nutritional requirements of nonirrigated cereal crops in north-central and eastern Oregon. Includes recommendations for nitrogen, phosphorus, potassium, sulfur, chloride, and zinc.

Steven Petrie, Don Wysocki, Donald A. Horneck, Larry Lutcher, John M. Hart, Mary Corp | Mar 2023 | Extension Catalog publication Peer reviewed (Orange level)

Winter Wheat in Continuous Cropping Systems (Intermediate Precipitation Zone) Fertilizer Guide

Addresses nutritional requirements of nonirrigated cereal crops in north-central and eastern Oregon. Includes recommendations for nitrogen, phosphorus, potassium, sulfur, chloride, and zinc.

Don Wysocki, Donald A. Horneck, Larry Lutcher, John M. Hart, Steven Petrie, Mary Corp | Mar 2023 | Extension Catalog publication Peer reviewed (Orange level)

Dryland Cropping Systems: Chickpea Production Guide

This publication discusses chickpea (garbanzo) cultivation in Oregon. Topics include variety selection, conditions for growth, seed and seedbed preparation, seeding date, method and rate of seeding, fertilizer and lime, ...

Mary Corp, Stephen Machado, Daniel A. Ball, Richard Smiley, Steven Petrie, Mark Siemens, Stephen Guy | Jul 2021 | Extension Catalog publication Peer reviewed (Orange level)

Collecting and Preserving Insects

Collecting insects can be a fun hobby, and is also an important step in IPM. The resources in this collection will help you learn how to find and collect insects and arthropods, then prepare them so that they can be useful for identification and research efforts.

Silvia I. Rondon, Mary Corp | Dec 2018 | Collection

Velvetleaf-Have you seen this weed?

This small plant causes extensive crop loss. Is it still missing?

Mary Corp | Oct 2018 | Article

Spikeweed

Can spraying this weed at the right time keep it out of our fields?

Mary Corp | Oct 2018 | Article

Take all

This root rot look-alike is endangering wheat, grass, and barley. Learn the signs, symptoms, and controls of this disease.

Mary Corp | Oct 2018 | Article

Blooming Biennials! Musk Thistle

Tall, diverse plant sneaks into pasture, rangeland, and timberland.

Mary Corp | Oct 2018 | Article

Dalmatian Toadflax

Deep-rooted, flowering perennial threatening crop production and rangeland.

Mary Corp | Oct 2018 | Article

Powdery Mildew

Pest spots wheat. What does this fungus want with our crops?

Mary Corp | Oct 2018 | Article

Fusarium

Fungus that attacks small grain crops effects crop yield.

Mary Corp | Oct 2018 | Article

Prickly Lettuce

This persistent, prickly pest plans to invade fields and stay there.

Mary Corp | Oct 2018 | Article

Barley Yellow Dwarf Virus

Virus mainly spread by aphids attacks wheat, barley and oats causing crop damage and yield loss. What is this disease?

Mary Corp | Oct 2018 | Article

Puncture Vine

Prickly, resilient vine comes back for more. This little bug has something to say about that.

Mary Corp | Oct 2018 | Article

Leafy Spurge

Hearty perennial reduces rangeland to a monoculture.

Mary Corp | Oct 2018 | Article

Cephalosporium Stripe

Winter cereals and grasses in danger of contracting disease.

Mary Corp | Oct 2018 | Article

Purple Loosestrife

Tall, spiky weed crows out essential vegetation.

Mary Corp | Oct 2018 | Article

Meadow Knapweed

Tall, aggressive perennial destroying native plants.

Mary Corp | Oct 2018 | Article

Common Crupina

Small flowering plant that poses a threat to rangeland.

Mary Corp | Oct 2018 | Article

Pythium

This pest stunts the growth and maturation or cereal grains.

Mary Corp | Oct 2018 | Article

Preserving insects and related arthropods

Learn to select the proper methods of preservation for your insect collection. Methods and materials depend on the type of insect and the purpose and size of the collection.

Mary Corp, Silvia I. Rondon | Jun 2016 | Article

How to Identify a Plant or Weed

When you want to identify a plant (weed), the first thing you need to do is take a picture of it. Then, collect and press the entire plant, if possible, and record information about it. Record where you collected the ...

Silvia I. Rondon, Mary Corp, Steve M. Van Vleet, Stuart Reitz, Pamela Hutchinson | Jul 2015 | Video Peer reviewed (Gray level)

Using A Plant Press

Preserving plant specimens is the best way to identify plants by their characteristics at a later period of time. It is always best (if possible) to collect the entire plant specimen at peak production, so you have included the roots, flowers and potentially the seeds of the plant.

Silvia I. Rondon, Mary Corp, Steve Van Vleet, Stuart Reitz, Pamela Hutchinson | Jul 2015 | Video Peer reviewed (Gray level)

Integrating Integrated Pest Management

Insects, weeds and plant pathogens are problems that confront farmers in trying to grow a successful crop. Insect pests can defoliate crop plants. Weeds can outcompete crops for light, water and nutrients. Pathogens can cause disease epidemics that destroy entire crops.

Silvia I. Rondon, Mary Corp, Stephen M. Van Vleet, Stuart Reitz, Pamela Hutchinson | Jul 2015 | Video

Monitoring diseases in the field

Diseases can reduce the yield and nutritional quality of crops. Vectors are organisms that transmit pathogens that cause diseases and can also threaten crops. Some important vectors of plant pathogens in the Pacific Northwest ...

Silvia I. Rondon, Mary Corp, Stephen M. Van Vleet, Stuart Reitz, Pamela Hutchinson | Jul 2015 | Video Peer reviewed (Gray level)

Detecting Plant Diseases in the Lab

The Hermiston Agricultural Research and Extension Center in Hermiston, Oregon has a full- service, plant pathology diagnostic lab that serves the growing needs of the agricultural community in the Columbia Basin. The lab receives ...

Silvia I. Rondon, Mary Corp, Stephen M. Van Vleet, Stuart Reitz, Pamela Hutchinson, Cassandra Sago | Jul 2015 | Video Peer reviewed (Gray level)

When are pears ready to be picked?

Q: How do you tell when pears are ready to pick? I know you pick them before they are yellow and soft, but I'd like to know more.

A: View answer | View all featured questions

Rattail Fescue control in chemical fallow

European native grassy weed on the rise.

Mary Corp, Daniel Ball | Oct 2011 | Article

Russian Wheat Aphid

What your rolled-up wheat leaves mean.

Mary Corp | Oct 2011 | Article

Sweep Net Technique

Demonstration of how to use a sweep net to collect insects.

Silvia I. Rondon, Mary Corp | Jul 2011 | Video

Insect Labeling

Oregon State University Extension's Mary Corp explains the importance of labeling insects in a collection and how to do it.

Mary Corp | Jul 2011 | Video

Wheat Head Armyworm True or False: A Tale from the Pacific Northwest

Armyworm caterpillars can be a troublesome pest in cereal grains grown in the Pacific Northwest states. This publication presents information about the pest and its control.

Silvia I. Rondon, Mary Corp, Diana Roberts, Keith S. Pike, Peter J. Landolt, Dustin Keys | May 2011 | Extension Catalog publication Peer reviewed (Orange level)

Irrigated Soft White Wheat (Eastern Oregon) Nutrient Management Guide

Management recommendations focusing on rate, timing, source, and method of nutrient application for irrigated wheat production in eastern Oregon.

Donald A. Horneck, John M. Hart, Michael D. Flowers, Larry Lutcher, Don Wysocki, Mary Corp, Mylen Bohle | Dec 2010 | Extension Catalog publication Peer reviewed (Orange level)

Invasive Plants of Eastern Oregon and Alternative Natives and Ornamentals

When deciding upon which plants will be used in your garden or landscaping project it’s important to avoid selecting species that are considered invasive. This publication provides several examples of invasive plants for our area, specifically for zones 5 and 6 of the United States Department of Agriculture’s “hardiness zones” chart.

Mary Corp, Chris Luttrell | Aug 2010 | Publication

Phylum Arthropod

Member of the Phyllum Arthropoda can be found in the seas, in fresh water, on land, or even flying freely; a group with amazing differences of structure, and so abundant that all the other animals taken together are less than 1/6 as many as the arthropods. Well-known members of this group are the lobsters, crayfish and crabs; scorpions, spiders, mites, ticks, the centipedes and millipedes; and last, but not least, the most abundant of all, the insects. The Phylum Arthropods consist of the following classes: arachnids, chilopods, diplopods, crustaceans and hexapods (insects).

Silvia I. Rondon, Mary Corp | Mar 2010 | Educational document

External Morphology

Information on external morphology of insects.

Silvia I. Rondon, Mary Corp | Mar 2010 | Educational document

Basic Insect Classification

Basic Insect Classification Chart

Silvia I. Rondon, Mary Corp | Feb 2010 | Educational document

Pinning and labeling insects

The proper way to pin an insect depends on the type of insect that you have collected. ALERT! soft-bodied insects such as scales, caterpillars, mayflies, silverfish and others cannot be pinned. Learn the 15 steps to pinning butterflies and moths.

Silvia I. Rondon, Mary Corp | Feb 2010 | Article Peer reviewed (Gray level)

Essential material needed for storing and displaying insects

Learn about storage boxes, insect pins, storage racks, spreading boards, point punches and other tips.

Silvia I. Rondon, Mary Corp | Jan 2010 | Article

Collecting insects and related arthoropods

Detailed instructions on collecting insects for a specimen collection.

Silvia I. Rondon, Mary Corp | Jan 2010 | Article

Agronomic Guidelines for Flexible Cropping Systems in Dryland Areas of Oregon

Plant-available soil water is the most reliable indicator of potential yield and is the basis of guidelines found in this publication.

Larry Lutcher, Don Wysocki, Mary Corp, Donald A. Horneck | Nov 2009 | Extension Catalog publication Peer reviewed (Orange level)

Scouting and collecting Wheat Head Armyworms

What growers can do to scout for and help identify wheathead armyworms.

Mary Corp | Oct 2008 | Article

Irrigated and Dryland Canola Nutrient Management Guide

Provides nutrient application recommendations for nitrogen, sulfur, phosphorus, potassium, zinc, boron, and pH adjustment. Includes example fertilizer application rate calculations.

Don Wysocki, Mary Corp, Donald A. Horneck, Larry Lutcher | Nov 2007 | Extension Catalog publication Peer reviewed (Orange level)

Managing Nitrogen for Yield and Protein in Hard Wheat

The successful production of hard wheat with acceptable protein is based, in part, on an effective nitrogen (N) management plan. This fact sheet discusses the principles of managing N for hard wheat production and...

Michael D. Flowers, Larry Lutcher, Mary Corp, Bradford D. Brown | Jan 2007 | Extension Catalog publication Peer reviewed (Orange level)

Monitoring Soil Nutrients in Dryland Systems Using Management Units

Focuses on how to design a soil nutrient monitoring strategy using management units or zones for soil testing and nutrient application. This approach is designed to provide better information to make nutrient ...

Mary Corp, Donald A. Horneck, Don Wysocki, Larry Lutcher | Nov 2006 | Extension Catalog publication Peer reviewed (Orange level)

Hessians are on the fly

Small pest effecting spring crops. Stalks breaking before harvest damages yield.

Mary Corp | Oct 2006 | Article

Leaf-Feeding Sawflies in Wheat

Documents 2003 wheat sawfly outbreak in Oregon. Provides growers and field consultants with educational information needed for decision making on fly control. Includes photos.

Mary Corp, Glenn Fisher | Oct 2003 | Extension Catalog publication Peer reviewed (Orange level)

Dryland Cropping Systems: Edible Mustard

This publication examines edible mustard history, uses, conditions for growing, and yield potential.

Don Wysocki, Mary Corp | Jul 2002 | Extension Catalog publication Peer reviewed (Orange level)

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