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A plant of the dock family, typically having slender leaves and a short spike of tiny compact flowers.
Genus Polygonum, family Polygonaceae: several species
‘It also controls certain broadleaf weeds, including Powell amaranth, jimsonweed, annual morningglory, redroot pigweed, Pennsylvania smartweed, common sunflower and wild mustard.’
‘A few rods further on the field dipped into a low area and I went through a small patch of green smartweed.’
‘The eggs hatch about the time that small smartweed plants begin to grow in the spring.’
‘Weeds not well-controlled by other herbicides include marestail, prickly lettuce, mustards, giant ragweed, Pennsylvania smartweed, and dandelion.’
‘Cloudberry leaves, bearberry leaves, and alpine smartweed were used for general stomach-aches and kidney problems.’
‘Higher rates of herbicide will be needed to control species such as ivy-leaf morning-glory, sweet clover, field bindweed, Venice mellow and various smartweeds (lady's thumb, Pennsylvania smartweed, wild buckwheat, etc).’
‘The product is labeled for application with other corn herbicides to improve residual control of broadleaf weeds, including lambsquarters, pigweed, common ragweed, Pennsylvania smartweed, and velvetleaf.’
‘Densely populated stands with mixtures of various shades of green and brown, however, had similar reflectance to that of alligator-weed, arrowhead, and smartweed.’
‘A year with extremely low precipitation may allow them to compete much better than species such as Pennsylvania smartweed.’
‘The list of weed species includes: morninglory, bindweed, buckwheat, Pennsylvania smartweed, Venice mallow, sweet clover, velvetleaf, lamb's quarters, and nightshade.’
‘It may not control smartweed, giant ragweed, and fall panicum that are more than 4 to 6 inches tall.’
‘A little farther, I went into a low area and through a patch of green smartweed.’
‘I eyed the expanse of flooded smartweed fringing the shore.’
‘A mixture of glyphosate plus an herbicide will improve control of prickly lettuce, dandelion, marestail, giant and common ragweed, Pennsylvania smartweed, velvetleaf, mustard species, and other broadleaf weeds.’