Resources by Michael Flessner

Title Available As Summary Date ID Author
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)
Prevention and Control of Palmer Amaranth in Soybean
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 meter of row can reduce soybean yield 32%.
Jun 1, 2016 2808-1006 (PPWS-78NP)
Pest Management Guide: Field Crops, 2018 Mar 1, 2018 456-016 (ENTO-239P)
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)
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
Control of Common Grassy Weeds in Pastures and Hayfields Jun 25, 2018 SPES-28NP
Giant Hogweed: Identification and Control Jul 27, 2018 SPES-48NP
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