Russian thistle


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Russian thistle

salsolakali.
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Currently, EBCL's top weed priorities include yellow starthistle, Russian knapweed, saltcedar, Russian thistle, leafy spurge, hoary cress, perennial pepper-weed, spotted knapweed, medusahead ryegrass, and rush skeleton weed.
In California, residents only have to look to the hills and vacant city lots for a list of culprits: Russian thistle, or tumbleweed; coastal sage; mug woort; lamb's quarters; lenscale; pig weed; western and false ragweed; English plantain and redroot.
Ragweed, pigweed, Russian thistle and sage brush, along with poison ivy, oak and sumac, are just a few invasive species that irritate allergies.
Through this network, the Frederick lab recently acquired four good candidate pathogens--two on Russian thistle, one on Russian knapweed, and another on common groundsel.
Pollen from sage, western ragweed and Russian thistle are all present, Becker said.

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