Which weed is spread by tillage rather than being controlled when tilled?

Which weed is spread by tillage rather than being controlled when tilled?

• A. Field Bindweed
• B. Canada thistle
• C. Quackgrass
• D. Barley

Answer: (A)

Field bindweed is a creeping perennial that spreads mainly through vegetative roots. When soil is tilled, those long, spreading roots can be cut into many fragments, and each fragment can survive and grow into a new plant. This makes tillage a vehicle for moving and increasing bindweed infestations rather than eliminating them. Because its primary mode of spread is those root pieces rather than seeds, tillage often fails to curb the weed and can even help it spread. In contrast, crops like barley aren’t weeds, and while other perennials such as Canada thistle or quackgrass can also spread via rhizomes, the standout issue with tillage is that field bindweed readily regenerates from root fragments produced by digging and turning the soil, so tillage ends up dispersing the weed.

Field bindweed is a creeping perennial that spreads mainly through vegetative roots. When soil is tilled, those long, spreading roots can be cut into many fragments, and each fragment can survive and grow into a new plant. This makes tillage a vehicle for moving and increasing bindweed infestations rather than eliminating them. Because its primary mode of spread is those root pieces rather than seeds, tillage often fails to curb the weed and can even help it spread. In contrast, crops like barley aren’t weeds, and while other perennials such as Canada thistle or quackgrass can also spread via rhizomes, the standout issue with tillage is that field bindweed readily regenerates from root fragments produced by digging and turning the soil, so tillage ends up dispersing the weed.