Meet the worst weeds in the patch

Very difficult, difficult to control weeds

– Corn- Palmer Amaranth and Pool

– Pasture, farmland and other grasses – Canadian Amekela

– Rice – several varieties (Sep.) (Yellow Nats and Rice Apartments) and Echinacea (Barcard Grass and Beach Cocker)

– Spring Cereals: Foxtel spp. (Green and Yellow Fox)

– Sorghum- Palmer Amaranth and John’s Grass

– Grass: Bluegrass spp. (Annual and difficult blogs)

– Winter cereals: Italian yeast and bromus

The most common weeds

– Corn – Common sheepfolds and fox spp. (Green, Yellow and Giant Fox)

– Grazing field, farmland and other hay – Brum (red, soft and soft brum, deception) and Canadian thorns

– Rice: Sedge spp. (Yellow nutsedge and rice flatsedge) and barnyardgrass

– Spring cereals – Typical sheep factories and fox spp. (Green, Yellow and Giant Fox)

– Sorghum – Palmer Amara

– Grass: Crabgrass spp. (Large, soft and southern crab)

– Winter cereals – Lamium (chicken and purple dead worm)

WSSA will conduct a survey of weeds and some other important row crops in 2019 and will be revived in 2022. Here are some findings from the United States and Canada (166 weed scientists responding).

Very difficult, difficult to control weeds

– Alfalfa (pigweed) (including red root, spine, water hole and palmer amaranth)

– Canola – wild oats

– Cotton: Palmer Amaranth

– Peanut-Palmer Amaranth

– Pulse crops: kochia

– Soybeans: Water and Horse Weeds

– Squirrels- Typical sheep factories

The most common weeds

– Alfalfa: pigweed spp.

– Canola – wild oats

– Cotton: Palmer Amaranth

– Nut: nutsedge spp. (Yellow and purple)

– Pulse crops: kochia

– Soy – Pool, marshmallow, common sheepskin and foxes (giant, green, yellow)

– Squirrels- Typical sheep factories

Go to… for more information on WSSA weed surveys.

In my own world, naming the worst weeds is an easy choice. It’s a spinal cord injury and it’s my fault. I could not refuse because he provided some free fertilizer from a local cattle producer and he has been paying me since then. The more I fought, the stronger they became. Every pierced finger or shiny stick weed leaves a deep understanding of how our path enters our lives.

These days, water farming may also be a state plant in my home state of Illinois. Like corn and sorghum, Piggads are C4 plants, very effective in carbon sequestration and adapted to high temperatures and sunlight. Should we be surprised that soybeans and cotton are regularly grown, and even higher than the top of the corn?

Promising to defeat these opponents, they quickly read the cardinal chapter given to Pigway. He wrote extensively on the biology of Palmer and water and how they did not pay special attention to modern practices, putting them on the path to “unusual weeds.”

Cardina covered the story behind eight weeds and how we got to where we are today. There is no wool among them, but it is still there. The narratives are about evolutionary biology and how plants respond to the environments in front of them.

Pamela Smith can be reached at

Follow her on Twitter @PamSmithDTN


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