http://www.pubs.ext.vt.edu/category/weeds.html en Fri, 01 May 2009 01:00:00 -0400 http://cyber.law.harvard.edu/rss/rss.html http://www.pubs.ext.vt.edu/ANR/ANR-10/ANR-10.html Wed, 27 Mar 2013 14:20:00 -0400 http://www.pubs.ext.vt.edu/ANR/ANR-10/ANR-10.html Plant Diseases Weeds http://www.pubs.ext.vt.edu/456/456-016/456-016.html Mon, 18 Feb 2013 11:24:00 -0500 http://www.pubs.ext.vt.edu/456/456-016/456-016.html Agricultural Insects / Pests Beekeeping Crops Fisheries Forestry Fruits Fruits & Vegetables Grapes & Wine Lawns Nursery & Greenhouse Pesticide Education Plant Diseases Turf Vegetables & Specialty Crops Weeds http://www.pubs.ext.vt.edu/456/456-017/456-017.html Thu, 14 Feb 2013 15:44:00 -0500 http://www.pubs.ext.vt.edu/456/456-017/456-017.html Agricultural Insects / Pests Beekeeping Crops Fisheries Forestry Fruits Fruits & Vegetables Grapes & Wine Lawns Nursery & Greenhouse Pesticide Education Plant Diseases Turf Vegetables & Specialty Crops Weeds http://www.pubs.ext.vt.edu/456/456-018/456-018.html Thu, 14 Feb 2013 01:40:00 -0500 http://www.pubs.ext.vt.edu/456/456-018/456-018.html Agricultural Insects / Pests Beekeeping Weeds Fruits & Vegetables Garden Insects / Pests Garden Plant Diseases Gardening & The Environment Lawns Turf Home Pests Pesticide Education Alternative Agriculture http://www.pubs.ext.vt.edu/AREC/AREC-29/AREC-29NP.html <p>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. </p> Fri, 16 Nov 2012 16:35:00 -0500 http://www.pubs.ext.vt.edu/AREC/AREC-29/AREC-29NP.html Crops Weeds http://www.pubs.ext.vt.edu/VTTP/VTTP-6/VTTP-6NP.html Wed, 09 May 2012 14:24:43 -0400 http://www.pubs.ext.vt.edu/VTTP/VTTP-6/VTTP-6NP.html Crops Weeds Plants, Soils, & Entomology Pesticide Education http://www.pubs.ext.vt.edu/VTTP/VTTP-2/VTTP-2.html Thu, 17 Nov 2011 11:21:02 -0500 http://www.pubs.ext.vt.edu/VTTP/VTTP-2/VTTP-2.html Pesticide Education Agricultural Insects / Pests Crops Weeds Pasture & Forage - Crops & Soils Aquaculture & Seafood Fisheries Forestry Home Pests Soils Home Systems Wildlife Garden Insects / Pests Pasture & Forage - Animal Agriculture http://www.pubs.ext.vt.edu/3109/3109-1594/3109-1594.html Thu, 29 Sep 2011 11:29:32 -0400 http://www.pubs.ext.vt.edu/3109/3109-1594/3109-1594.html Weeds Fisheries Garden & Landscape Design http://www.pubs.ext.vt.edu/2912/2912-1430/2912-1430.html Tue, 22 Dec 2009 17:15:04 -0500 http://www.pubs.ext.vt.edu/2912/2912-1430/2912-1430.html Weeds Crops http://www.pubs.ext.vt.edu/2912/2912-1429/2912-1429.html Tue, 22 Dec 2009 15:53:19 -0500 http://www.pubs.ext.vt.edu/2912/2912-1429/2912-1429.html Weeds Crops http://www.pubs.ext.vt.edu/2912/2912-1428/2912-1428.html Tue, 22 Dec 2009 14:48:09 -0500 http://www.pubs.ext.vt.edu/2912/2912-1428/2912-1428.html Weeds Crops http://www.pubs.ext.vt.edu/418/418-142/418-142.html <p>The Shenandoah Valley of Virginia and some other regions produce more manure nutrients than local crops need. This manure has traditionally been applied to row crops and overapplication has led to soil-test phosphorus (P) being well above agronomic optimum in many cases. In 2008, it was estimated that nutrient-management regulations now require that approximately 85 percent of poultry litter be applied off poultry farms, as they do not have sufficient land to beneficially recycle their manure nutrients. There is a substantial area of nutrient-deficient forage production in the Shenandoah Valley that could benefit from this poultry litter. This publication summarizes two years of field research on fertilizing nutrient-deficient forages with poultry or commercial fertilizer. It also evaluates split versus single annual applications of nutrients and addresses a common misconception that poultry litter contains weed seeds.</p> Wed, 16 Sep 2009 12:12:26 -0400 http://www.pubs.ext.vt.edu/418/418-142/418-142.html Pasture & Forage - Crops & Soils Weeds Poultry http://www.pubs.ext.vt.edu/418/418-150/418-150.html <p>Weeds constantly invade crop fields and pastures; therefore, it is important to know the potential quality of individual weed species in making management decisions concerning weed control. It is frequently assumed that weeds have low nutritive value and livestock will not eat weeds, so expensive and time-consuming measures are often used for their control.¹² Some weeds are toxic or poisonous to livestock, and certain weeds are unpalatable – causing a reduction in total intake.⁹ Several weed species have thorns or spines that can injure the grazing animal’s mouth and/or irritate its eyes, which may lead to pinkeye.⁹ Other weeds can cause the milk and meat of livestock to have a negative taste or odor. Weeds also compete with cultivated crops and forages for moisture, light, and nutrients, but many weeds are nutrient-rich and digestible.⁹ The objective of this review paper is to recognize the nutritional values of weeds commonly found in pastures.²</p> Thu, 06 Aug 2009 09:31:33 -0400 http://www.pubs.ext.vt.edu/418/418-150/418-150.html Pasture & Forage - Crops & Soils Weeds http://www.pubs.ext.vt.edu/424/424-030/424-030.html Wed, 29 Jul 2009 12:10:08 -0400 http://www.pubs.ext.vt.edu/424/424-030/424-030.html Plant Diseases Crops Grains Weeds http://www.pubs.ext.vt.edu/2906/2906-1328/2906-1328.html <p>One question that I have frequently received this year, just like last year, concerns the availability of Surflan (common name oryzalin). Surflan is a commonly-applied preemergence herbicide for control of annual grasses like crabgrass and foxtail, along with certain annual broadleaf weeds like chickweed, pigweed, and lambsquarters.</p> Fri, 24 Jul 2009 10:03:24 -0400 http://www.pubs.ext.vt.edu/2906/2906-1328/2906-1328.html Fruits Weeds http://www.pubs.ext.vt.edu/2906/2906-1327/2906-1327.html <p>For small fruit growers, the challenge of weed management is one of the greatest they will face to successfully grow these crops. Factors such as climate, weed introductions and adaptability, and years of agricultural activity have come together to select for weed species that are aggressive and persistent. Without management, weeds compete with crops for light, nutrients and water, resulting in stressed plants, poor fruit quality and yield.</p> Fri, 24 Jul 2009 09:25:54 -0400 http://www.pubs.ext.vt.edu/2906/2906-1327/2906-1327.html Fruits Weeds http://www.pubs.ext.vt.edu/2808/2808-1006/2808-1006.html <p>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. Four Palmer amaranth plants per 100 ft2 of row can reduce soybean yield by 12 to 17%.</p> Fri, 01 May 2009 01:00:00 -0400 http://www.pubs.ext.vt.edu/2808/2808-1006/2808-1006.html Weeds Crops http://www.pubs.ext.vt.edu/2805/2805-1001/2805-1001.html <p>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%.</p> Fri, 01 May 2009 01:00:00 -0400 http://www.pubs.ext.vt.edu/2805/2805-1001/2805-1001.html Crops Weeds http://www.pubs.ext.vt.edu/450/450-143/450-143.html Perennial woody vine that may reach 40 feet or more in length. Fri, 01 May 2009 01:00:00 -0400 http://www.pubs.ext.vt.edu/450/450-143/450-143.html Weeds http://www.pubs.ext.vt.edu/450/450-142/450-142.html A perennial from rhizomes with conspicuous spines on leaves and stems reaching 3 feet in height. Fri, 01 May 2009 01:00:00 -0400 http://www.pubs.ext.vt.edu/450/450-142/450-142.html Weeds http://www.pubs.ext.vt.edu/450/450-141/450-141.html Perennial weed with persistent rhizomes that may be spread or transported by cultivation equipment or also in burlaped nursery stock infested with rhizomes. Fri, 01 May 2009 01:00:00 -0400 http://www.pubs.ext.vt.edu/450/450-141/450-141.html Weeds http://www.pubs.ext.vt.edu/450/450-140/450-140.html Fri, 01 May 2009 01:00:00 -0400 http://www.pubs.ext.vt.edu/450/450-140/450-140.html Weeds http://www.pubs.ext.vt.edu/450/450-139/450-139.html A perennial with slender, twining stems that may reach 10 feet in length. Fri, 01 May 2009 01:00:00 -0400 http://www.pubs.ext.vt.edu/450/450-139/450-139.html Weeds http://www.pubs.ext.vt.edu/427/427-101/427-101.html <p>Common reed is a tall perennial grass with creeping rhizomes that may make a dense vegetative mat. The leaves are rolled in the shoot, no auricles are present, and the ligule is a fringe of hairs. Leaf blades are 1 to 5 cm wide, 20 to 60 cm long, flat, and glaborous. The leaf margins are rough and the sheaths are overlapping.</p> Fri, 01 May 2009 01:00:00 -0400 http://www.pubs.ext.vt.edu/427/427-101/427-101.html Weeds http://www.pubs.ext.vt.edu/427/427-008/427-008.html <p>On October 3, 2007, the Weed Identification Clinic at Virginia Tech received an itchgrass [<em>Rottboellia cochinchinensis</em> (Lour.) Clayton] sample from a cornfield in Westmoreland County, near Montross (Figure 1). Currently, itchgrass is considered a federal noxious weed and the Westmoreland County sample is the first record of this plant in the state of Virginia.</p> Fri, 01 May 2009 01:00:00 -0400 http://www.pubs.ext.vt.edu/427/427-008/427-008.html Weeds http://www.pubs.ext.vt.edu/427/427-002/427-002.html <p>Annual and perennial weed control in pastures and hayfields is an important aspect of successful forage management. This publication will discuss control measures for many of the common weeds found in Virginia and West Virginia permanent fescue and mixed fescue / bluegrass / orchardgrass pastures and hayfields.</p> Fri, 01 May 2009 01:00:00 -0400 http://www.pubs.ext.vt.edu/427/427-002/427-002.html Pasture & Forage - Crops & Soils Weeds http://www.pubs.ext.vt.edu/427/427-001/427-001.html <p>In Virginia, annual ryegrass has become one of the most troublesome and difficult to control weeds in small grains, as well as in corn and soybeans grown in rotation with small grains. Annual ryegrass control has declined due to the development of resistance to Hoelon, which has been the only treatment available for control in wheat and barley. Lack of control in small grains has allowed annual ryegrass to proliferate and become problematic in no-till corn establishment where high rates of triazine herbicides or sequential applications of nonselective herbicides are frequently required for acceptable control.</p> Fri, 01 May 2009 01:00:00 -0400 http://www.pubs.ext.vt.edu/427/427-001/427-001.html Grains Weeds http://www.pubs.ext.vt.edu/430/430-536/430-536.html <p>There are thousands of species of moss worldwide. These very simple plants lack the typical leaf, shoot, root, and seed-forming systems of most higher plants; however, they are some of the hardiest living organisms on the planet (Figure 1). Lawn moss can reproduce sexually (spores, etc.) or asexually (breaking off into smaller pieces that divide and multiply), and their numbers can increase rapidly under the right conditions. They are tolerant of extremely low mowing, so regular clipping of the grass will not remove them. It would seem that these plants would not offer much resistance to our efforts to manage or control them, but as Mother Nature often shows, their simplicity in design and function correlates well with their ability to colonize and persist in some of the most inhospitable growing conditions around your property: sidewalks, driveways, and yes – the lawn.</p> Fri, 01 May 2009 01:00:00 -0400 http://www.pubs.ext.vt.edu/430/430-536/430-536.html Turf Weeds Lawns http://www.pubs.ext.vt.edu/426/426-109/426-109.html <p>Those who experience the blisters, swelling, and extreme itching that result from contact with poison ivy (Toxicodendron radicans), poison oak (Toxicodendron pubescens), or poison sumac (Toxicodendron vernix) learn to avoid these pesky plants. Although poison oak and poison sumac do grow in Virginia, poison ivy is by far the most common. This publication will help you identify poison ivy, recognize the symptoms of a poison ivy encounter, and control poison ivy around your home.</p> Fri, 01 May 2009 01:00:00 -0400 http://www.pubs.ext.vt.edu/426/426-109/426-109.html Home Safety Garden Insects / Pests Weeds Forestry Natural Resources