Across the state, pumpkin plantings are hitting their stride with varying degrees of success. The grower phone calls I’ve received lately revolve around options for managing emerged weeds. Broadcast options are limited to grass-selective herbicides such as sethoxydim, clethodim, and halosulfuron (Sandea®) for small broadleaf weeds and sedge suppression. All of these products can result[Read More…]
Stephen Meyers
Common names: Yellow nutsedge, yellow nutgrass, nut sedge, chufa, earth almond, northern nutgrass Latin names: Cyperus esculentus L. Family: Cyperaceae (Sedge family) General Description Perennial sedges are among the most troublesome weed species globally across agronomic crops, horticultural crops and turfgrass. Because nutsedges look like grasses (Figure 1), they are often referred to as “nutgrasses”.[Read More…]
Common names: Carpetweed, Indian chickweed, whorled chickweed, devils-grip, green carpetweed Latin name: Mollugo verticillata L. Family: Molluginaceae General Description and Life Cycle Carpetweed is a summer annual. Compared to other summer annual weeds, its germination is usually later in the summer. The plant grows rapidly and reproduces by seeds. Carpetweed is mostly found in dry[Read More…]
The use of silage tarps for weed management has increased dramatically in recent years, including in our own research in the Horticulture Crops Weed Science Lab at Purdue University. This article answers five common questions about tarping for weed management. What are silage tarps? Silage tarps are reusable, opaque plastic sheets that are black on[Read More…]
Common names Common milkweed, silkweed, cotton-weed, Virginia silk, wild cotton, silky milkweed, common silkweed, showy milkweed, swallow wort. Latin name Asclepias syriaca. “Asclepias” from Asklepios, the Ancient Greek god of medicine and healing. “syriaca” is Latin for the country of Syria and was so named because Linnaeus mistakenly thought this plant came from Syria. Family[Read More…]
Common names: Palmer amaranth, Palmer pigweed, carelessweed, and dioecious amaranth. Latin name: Amaranthus palmeri. “Amaranthus” is derived from the Greek word “amarantus” meaning “everlasting flowers”. This is a reference to the showy bracts (modified floral leaves) of Amaranthus species that persist well after the plants have flowered and set seed. “palmeri” is a reference to[Read More…]
Indiana mint growers have a newly registered use for a familiar herbicide. Spartan®, already labeled for use in newly planted and dormant mint, can now be applied as a post-harvest application in Indiana with a new 24(c) Special Local Needs label (Figure 1). Here is what you need to know -An application can only be[Read More…]
Common names: Dandelion, lions-tooth, blow-ball, cankerwort, Irish daisy, pee-a-bed, wet-a-bed Latin name: Taraxacum officinale Family: Asteraceae (Aster family, sunflower family) Life Cycle Dandelion is a perennial weed that reproduces by seed. Seeds germinate in spring and summer, and seedlings form a rosette (Figure 1). Dandelions begin flowering in their second year of growth, with concentrated[Read More…]
Background Sweet potato is a staple crop that provides nutritional benefits to humans globally, but weed interference (Figure 1) can reduce yields by 22 to 90%. Despite increased organic sweet potato production in the United States, growers face challenges with limited weed management options and often resort to cultivation and hand-weeding. Objectives and Methodology To[Read More…]
Common names Common chickweed, chickweed, starwort, starweed, bindweed, chicken-weeds, winter weed, satin flower, tongue grass, chickwhirtles, cluckenweed, mischievous Jack, skirt buttons, cyrillo, and white bird’s eye. Fun fact Did you notice how many common names refer to chickens? It turns out that this weed was used as a go-to in chicken and bird diets! Latin[Read More…]