Resources for Weeds

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)
Palmer amaranth (Amaranthus palmeri) Control in Soybeans Mar 20, 2020 2808-1006 (SPES-194NP)
Exotic Invasive Plants
Invasive exotic species are plants that are not native to a given area and have the ability to out-compete indigenous plant species. Invasive exotics are often brought into their non-native surroundings by humans with good intentions.
Apr 29, 2020 420-320 (CNRE-105NP)
Successful No-Tillage Corn Production Mar 20, 2019 424-030
Poison Ivy: Leaves of three? Let it be! May 9, 2018 426-109 (HORT-292P)
Virginia Master Naturalist, Basic Training Course, Botany
Plants can be defined as multicellular, photosynthetic organisms with reproductive structures that are more complex than single cells. By this definition, algae are not considered plants because they are either unicellular or their reproductive structures are essentially unicellular. Fungi, too, are excluded because they are not photosynthetic. At least 400 million years of diversification have resulted in a wide diversity of taxonomically distinct major groups of plants. Some of the most important groups of plants found in Virginia are described below.
Jul 19, 2019 ANR-10NP (CNRE-62NP)
Integrated Pest Management of Hemp in Virginia Mar 2, 2020 ENTO-349NP
Critical updates for the 2021 Mid-Atlantic Commercial Vegetable Recommendations Mar 10, 2021 ENTO-446NP
Weed Management in Small Fruit Crops Jan 23, 2018 HORT-286NP
Managing Troublesome Crop Weeds: Current Practices Jul 25, 2017 PPWS-101NP
Glyphosate Q & A Sheet Feb 8, 2019 SPES-113NP
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)
Identification of Virginia’s Noxious Weeds Sep 21, 2020 SPES-244NP
Driving Homeowners ‘Nuts’: Sedge in the Lawn Jul 23, 2021 SPES-344NP
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
VCE Ag Today: Hot Topics in Weed Management Mar 25, 2021 VCE-1027-7NP
Pesticide Applicator Manuals Dec 17, 2021 VTTP-2