We talk about herbicide resistance all of the time in California rice, but how does it evolve in a field? Understanding how herbicide management selects for resistant populations is an important part of preventing the problem from occurring in your fields.
We have many weed species in CA rice that are confirmed to be herbicide resistant. The major herbicide-resistant species are late watergrass, early watergrass, barnyardgrass, smallflower umbrella sedge, ricefield bulrush (roughseed), sprangletop, and redstem. For this illustration of how herbicide resistance evolves in a field, we use redstem as our example.
Year 1, Beginning of season: A population of redstem is found in a...
- Author: Lynn M. Sosnoskie
This blog was originally supposed to be an interesting article on Thanksgiving foods; specifically, a discussion about crops (i.e. squashes, onion, corn, carrots, parsnips, etc...) that traditionally accompany our Thursday turkey, as well as their weedy relatives.
However, I stumbled upon more thought-provoking article that I've chosen to share, instead.
The paper, 'Crops gone wild: evolution of weeds and invasives from domesticated ancestors', which was published in the journal 'Evolutionary Applications' (Norman C. Ellstrand (UC-Riverside) et al., 3:494-504) in 2010, can be accessed here.
The authors, who are...