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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%.
Sep 22, 2020 2805-1001 (SPES-266NP)
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)
Palmer amaranth (Amaranthus palmeri) Control in Soybeans Mar 20, 2020 2808-1006 (SPES-194NP)
Agronomy Handbook 2023 Dec 11, 2023 424-100 (SPES-299P)
Agronomy Handbook 2023: Part XIII. Weeds and Weed Management Dec 18, 2023 424-100-M (SPES-299P-M)
2024 Pest Management Guide - Field Crops Jan 26, 2024 456-016 (ENTO-566P)
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
Herbicides that are usually associated with contamination of straw/hay, turf clippings, manure, and composts are growth regulator herbicides or synthetic auxins, a group of herbicides that mimics plant hormones and regulates growth. These herbicides are labeled for control of broadleaf weeds in grass crops, such as pastures and corn; in turfgrass, including lawns, golf courses, parks, and highway turf; and in noncrop areas. Vegetable and fruit crops, as well as broadleaf ornamentals can inadvertently be injured by these chemicals through drift of spray droplets, volatilization, and spray tank contamination or by residues in straw, manure, turf clippings, or compost. Diagnosing the specific herbicide responsible for the plant damage can be difficult. This publication focuses on damage caused by herbicide residues.
PPWS-77P (SPES-565P)
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
Identification of Virginia’s Noxious Weeds May 17, 2023 SPES-244NP (SPES-502NP)
Pasture Weed Management and Protecting White Clover Nov 24, 2020 SPES-269-2
2021 Virtual Eastern Shore Agricultural Conference and Trade Show Mar 12, 2021 SPES-312NP
Giant Hogweed: Identification and Control
This publication provides information on giant hogweed identification, including how to distinguish between look alike species, and what to do if you think you have found giant hogweed.
Jul 10, 2023 SPES-48NP (SPES-245NP)
Weed Management Planner - Before Planting Aug 2, 2023 SPES-268NP (SPES-506NP-A)
Weed Management Planner - After Planting Feb 13, 2024 SPES-268NP (SPES-570NP-B)
Control of Common Grassy Weeds in Pastures and Hayfields
This publication reviews options for controlling common grassy weeds in grass forages including chemical and cultural management options. Specific weeds are discussed in detail including johnsongrass, Japanese stiltgrass, broomsedge, and foxtail species.
Jan 17, 2024 SPES-58P (SPES-563P)
No-Till Seeding of Forage Grasses and Legumes May 6, 2019 SPES-92P
VCE Ag Today: Herbicide Resistant Management Update Apr 12, 2021 VCE-1027-14NP
VCE Ag Today: Palmer Amaranth ID and Control Mar 25, 2021 VCE-1027-24NP
VCE AG Today - Dicamba Update Mar 23, 2021 VCE-1027-33NP
VCE Ag Today: Weed Control in Pastures Nov 10, 2021 VCE-1027-55NP
VCE Ag Today: Hot Topics in Weed Management Mar 25, 2021 VCE-1027-7NP