Resources by David Holshouser
|Prevention and Control of Palmer Amaranth in Cotton||
Palmer amaranth (Amaranthus palmeri), a member of the "pigweed" family, is one of the most troublesome weeds in many southern row crops. Seed can germinate all season and plants can grow to over 6 feet in height. Plants have either male flowers that shed pollen or female flowers that can produce up to 600,000 seed per plant. One Palmer amaranth per 30 foot of row can reduce cotton yield by 6 to 12%.
|Mar 25, 2015||2805-1001 (PPWS-60NP)|
|Palmer amaranth (Amaranthus palmeri) Control in Soybeans||Mar 20, 2020||2808-1006 (SPES-194NP)|
|Soybean Rust Incidence and the Response of Soybeans to Fungicides in 2008||Nov 19, 2009||2911-1420|
|Green Stem Syndrome in Soybean||Dec 22, 2009||2912-1430|
|Suggested Soybean Seeding Rates for Virginia||Jun 11, 2010||3006-1447|
|Days to Soybean Physiological Maturity||Sep 9, 2010||3009-1459|
|Soybean Rust Incidence and the Response of Soybeans to Fungicides in 2009||Dec 21, 2010||3012-1520|
|2009-2010 Performance of Sorghum Hybrids in the Virginia‐Carolina Region||Jan 25, 2011||3101-1531|
|Soybean Choices and Challenges for Your Family||May 1, 2009||348-040|
|Tips for Profitable Variety Selection: How to Use Data From Different Types of Variety Trials||Mar 29, 2019||424-040|
|Agronomy Handbook, 2000||May 1, 2009||424-100||
|Identifying Soybean Fields at Risk to Leaf-Feeding Insects||Nov 13, 2018||444-203 (SPES-74P)|
|Asian Soybean Rust - Frequently Asked Questions II: Identification, Biology, and Ecology||May 1, 2009||450-302|
|Asian Soybean Rust - Frequently Asked Questions III: Control with Fungicides||May 1, 2009||450-303|
|Virginia On-Farm Soybean Test Plots 2016||
These demonstration and research plot results are a collaborative effort of Virginia Cooperative Extension (VCE) Agents and Specialists, area producers, and agribusiness. The purpose of this publication is to provide research-based information to aid in the decision-making process for soybean producers in Virginia. It provides an unbiased evaluation of varieties, management practices, and new technologies through on-farm replicated research using producer equipment and time. These experiments enable producers to make better management decisions based on research and provide greater opportunities to improve yields and profits, which improves quality of life for them and their families.
|Jan 13, 2017||ANR-244NP|
|Virginia Soybean Performance Tests 2015||
The purpose of this publication is to provide performance data of the many soybean varieties offered for sale in Virginia. These data should be of benefit to producers and agribusinesses in making selections of varieties for their use. It is realized that not all varieties that are offered for sale in Virginia are included in these tests. There is no implication that varieties not included are inferior in any way, but only that they have not been tested.
|Feb 19, 2016||AREC-170NP|
|Virginia Soybean Performance Test 2016||Mar 29, 2017||AREC-209NP|
|Troubleshooting The Soybean Crop||Nov 16, 2012||AREC-25NP|
|Soybean Reproductive Development Stages||
Remove the soybean plant at ground level to make it easier to stage. Examine each main stem node one at a time to determine the development stage. Focus on the top four nodes that contain fully developed leaves (shown below). A fully developed leaf is one that is located immediately below a node containing a leaf with unrolled or unfolded leaflets (leaflet edges are no longer touching). The soybean crop is considered to be at a particular stage when 50% of the plants reach that stage. Listed with stage description for R1 through R6 are the approximate number of days to R7, or physiological maturity, for full season (FS) soybean planted in May and double crop (DC) soybean planted in June/July.
|Jul 25, 2019||AREC-59NP (SPES-156NP)|
|Double Cropping Soybeans In Virginia||
Double cropping is simply growing and harvesting two crops in one year. In the mid-Atlantic region of the United States, soybeans are commonly double-cropped after a winter small-grain crop, usually wheat. However, double cropping is not limited to the small-grain-soybean system. Other crops, such as grain sorghum or even corn, could fit into a double-cropping system with small grains. Soybean can be grown after other winter crops, such as canola, or after a spring crop, such as snap beans. As long as both crops can complete their development in time to allow profitable production of the entire system, numerous double-cropping systems are possible.
|Mar 11, 2015||CSES-102NP (CSES-104NP)|
|The Nutrient Value of Straw||
The mature and dried stem, leaves, and chaff remaining after barley and wheat are harvested is known as straw. Many farmers around Virginia harvest straw by baling in small bales, large round bales, or large square bales that range in weight from 40 to 1,000 lbs. plus per bale.
|Jun 19, 2015||CSES-126NP|
|Soybean Growth and Development||
Proper management of the soybean crop requires knowledge of how environmental conditions and pests affect growth during vegetative and reproductive stages. For example, too little or too much soil moisture at certain stages may hinder growth and lower yield, and insect pests may damage the crop at one stage but not another. The information below can help you determine the proper timing of various management practices.
|Nov 13, 2015||CSES-134NP|
|Predicting Soybean Reproductive Stages in Virginia||Oct 7, 2017||CSES-197P|
|Virginia Soybean Performance Tests 2017||Mar 23, 2018||CSES-232NP|
|2017 Virginia On-Farm Soybean Test Plots||Jan 4, 2018||CSES-223NP|
|Virginia Soybean Performance Tests 2018||May 14, 2019||SPES-118 (SPES-130NP)|
|2019 Virginia On-Farm Soybean Research||Jan 22, 2020||SPES-182NP|
|Virginia Soybean Performance Tests 2019||Feb 12, 2020||SPES-191NP|
|2018 Virginia On-Farm Soybean Research||Jan 16, 2019||SPES-96NP|