All Rights Reserved. Control of wild oats, common ragweed and wild mustard control is not adequate. If too much nitrogen is applied at once, however, toxic levels of nitrate may accumulate in the plants. Not labeled for use in alfalfa establishment 3. rows with a standard drill will result in a good stand; broadcast or airplane seeding requires more seed. It may take up to one day longer to field cure kochia hay than it does for alfalfa hay. typically found in alfalfa fields are divided into three ma-jor classes: broadleaf weeds, grasses, and sedges. Several years of alfalfa growth can help to reduce soil compaction. Figure 1. alfalfa, the quality of the forage declines as the percent-age of weeds increases (2, 3, 7, 9). All herbicides effectively controlled downy brome (Bromus tectorum L.). Kochia may be found in cropland, dry pastures, and rangeland. Do not apply more than 150 lb N/acre in one application, or nitrate toxicity can result. A study was established to compare weed control and alfalfa response of a metribuzin formulation from Cheminova with the current formulation and some other herbicide options. Kochia does not compete well with grasses. The best approach to kochia control in sunflower is to start with an early preplant burndown treatment in early April to control the early emerged plants. Kochia appears to be free of diseases that cause commercial loss. Volunteer kochia will be a problem in crops following kochia, thus cultural or chemical control of kochia will be needed in these crops. long, narrow, pointed and attached directly to the stems. Broadleaf weeds, such as plantain (Figure 6), can be some of the toughest weeds to control in alfalfa.