Mark VanGessel, Extension Weed Specialist; mjv@udel.edu
Weed emergence of summer annual weeds has begun. Common ragweed seedlings began to peek through last week and plenty more coming through this week. Common ragweed is one that starts early, along with common lambsquarters and giant foxtail. While growth of these plants will be slow due to the cool weather, be sure to account for them in your burndown herbicide programs. This means that even if your field looks weed-free, there may be small seedlings that you will not see unless you look for them.
Ragweed seedlings.