Managing your soil seedbank
By Stephanie Karhoff
Achieving clean, weed-free fields next spring requires acting now to prevent seed from being deposited into the soil seedbank. The weed seedbank is the reservoir of seeds in the soil that will serve as the source for seedlings next season. Exhausting this reserve of seeds can help prevent rapid population increases and slow herbicide resistance development.
Our most problematic weed species are prolific seed producers. Waterhemp can produce over a million seeds per plant if plants emerge early in the season and have adequate resources. Meanwhile marestail can produce about 200,000 seeds per plant.
Weeds that have either escaped POST herbicide applications or emerged afterwards are currently developing mature seeds. If we assume that one single waterhemp plant can produce 1 million seeds, and 20 percent of these seeds are viable, and only 25% germinate, 50,000 plants are generated in the span of one year from that single escape.… Continue readingRead More »