article Aug 04, 2015

Collecting rice weed seeds for herbicide-resistance testing

Herbicide resistance is a serious problem in California rice. However, not every control failure can be attributed to herbicide resistance.

Other factors can cause control failures. Among the most common are weather, incorrect rate, poor coverage or application timing, skips, and spray equipment malfunction.

When weed control fails, it is important to determine the cause. When the cause is herbicide resistance, herbicide programs should be adjusted.