Resources by Michael Flessner
|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%.
|Sep 22, 2020||2805-1001 (SPES-266NP)|
|Palmer amaranth (Amaranthus palmeri) Control in Soybeans||Mar 20, 2020||2808-1006 (SPES-194NP)|
|Pest Management Guide: Field Crops, 2020||Feb 6, 2020||456-016 (ENTO-366P)|
|Virginia Cotton Production Guide 2016||
Proper soil fertility management ensures sufficient nutrients for maximum cotton production. Obtaining and maintaining appropriate soil nutrient concentrations is imperative, as fertilizer inputs are the largest component of production budgets for Virginia cotton farmers. At the same time, excessive nutrient application wastes money, wastes natural resources, and can negatively impact yields and environmental quality.
|Feb 22, 2016||AREC-124NP (AREC-165NP)|
|Integrated Pest Management of Hemp in Virginia||Mar 2, 2020||ENTO-349NP|
|Managing Troublesome Crop Weeds: Current Practices||Jul 25, 2017||PPWS-101NP|
|Plant Injury From Herbicide Residue||
In recent years, an increased number of cases of injury from herbicide residue in straw/hay, manure, and compost have been diagnosed in the Virginia Tech Plant Disease Clinic. Growers are surprised and dismayed to learn that manure, straw, mulch, or other amendments intended to improve their garden or landscape might have such unforeseen consequences. Of particular concern to organic growers are herbicide residues.
|Aug 22, 2016||PPWS-77P|
|Harvest Weed Seed Control||May 6, 2019||SPES-135NP|
|Common Ragweed (Ambrosia artemisiifolia) Control in Soybeans||Jun 6, 2019||SPES-143NP|
|Using Cover Crops to Suppress Horseweed||Sep 14, 2020||SPES-164P (SPES-202P)|
|Herbicide Options to Terminate Winter Cover Crops||Sep 18, 2019||SPES-167NP|
|2020 Virginia Tech Eastern Shore AREC Virtual Research Field Day||Aug 17, 2020||SPES-239NP(SPES-243NP)||
|Identification of Virginia’s Noxious Weeds||Sep 21, 2020||SPES-244NP|
|Giant Hogweed: Identification and Control||Sep 21, 2020||SPES-48NP (SPES-245NP)|
|Control of Common Grassy Weeds in Pastures and Hayfields||
Grassy weeds in pastures and hayfields compete with desired forage species and reduce the productivity of forage systems. Lack of selective herbicides makes grassy weed species, such as Johnsongrass, Japanese stiltgrass, broomsedge, and foxtail species difficult to control. Proper soil fertility, grazing management, and correct timing and placement of herbicide application can effectively control these species.
|Nov 6, 2018||SPES-58P|
|No-Till Seeding of Forage Grasses and Legumes||May 6, 2019||SPES-92P|