ALFALFA - ANNUAL MORNINGGLORY, ETC.
Active Ingredient: This product contains 0.75 lb. of 4-(2,4-dichlorophenoxy) butyric acid per pound of formulated product.
Apply this product only as specified on the label.
NOTE: Avoid spray drift to susceptible plants and crops: cotton, tobacco, tomatoes, ornamentals, etc. Coarse sprays are less likely to drift.
Spray equipment previously used to apply another phenoxy must be thoroughly cleaned with alkali and water prior to use with DB 7500. Similarly, after using DB 7500 wash sprayer thoroughly before using again to spray susceptible crops. Do not use near greenhouses. Observe all cautions and limitations on labeling of all products used in mixtures. Use agitation to keep solution well mixed, especially if it has been allowed to stand unagitated.
Calibrate sprayer accurately.
DO NOT APPLY WHEN CROP IS STRESSED FROM LACK OF MOISTURE.
DO NOT APPLY THIS PRODUCT THROUGH ANY TYPE OF IRRIGATION SYSTEM.
GROUNDWATER CONTAMINATION: Most cases of groundwater contamination involving phenoxy herbicides such as 2,4-DB have been associated with mixing/loading and disposal sites. Caution should be exercised when handling 2,4-DB pesticides at such sites to prevent contamination of groundwater supplies. Use of closed systems for mixing or transferring this pesticide will reduce the probability of spills. Placement of the mixing/loading equipment on an impervious pad to contain spills will prevent groundwater contamination.
For use in seedling alfalfa, spray when the crop has reached the 1 to 2 trifoliate leaf stage and growing conditions are good. In established alfalfa certain weeds will emerge in the fall and over winter in a rosette stage. Best control of these weeds will result from application in late fall or early winter rather than in the spring. Do not apply after flowering.
WHEN TO APPLY:
Weeds must be in the young seedling stage and actively-growing to achieve satisfactory results. For best results spray weeds in the 2 to 5 leaf stage of growth.
AMOUNT TO USE:
Apply DB 7500 as an overall spray by ground sprayer or airplane. Apply at rates listed below according to weed problems. Use the higher rate if weeds are past the seedling stage. Aerial applications should be made in at least 5 gallons of water per acre, while ground sprayer applications should be made in a minimum of 10 gallons of water per acre. Higher spray gallonage per acre of 10 gallons by aerial application and 20 to 30 gallons for ground sprayer applications will give better coverage and weed control. Spray gallonage should give adequate coverage of the weeds without run-off. The use of a non-ionic or non-ionic/anionic surfactant or crop-oil concentrate approved for agricultural uses at their label rates will usually result in better weed control, especially if weeds are beyond the seedling stage.
Do not graze established alfalfa, nor feed straw or hay from established alfalfa to livestock within 30 days after application. Do not graze or feed SEEDLING alfalfa within 60 days after application. Irrigation, in particular overhead sprinkler irrigation, should be delayed as long as possible (10 days or more) following application of DB 7500 to avoid washing the chemical into the root zone. Do not apply when crop is stressed from lack of moisture. DO NOT use on peas.
Apply as a postemergent spray. When properly timed there is little or no effect on the crop. In established alfalfa there may be some twisting of stems and malformation of leaves. This condition is usually outgrown.
Do not spray when daytime temperatures are expected to exceed 90°F within the next 2 or 3 days. Do not apply if temperatures are likely to fall below 40°F during or shortly after treatment.
Use of a surfactant or crop-oil concentrate in the desert areas of California and Arizona may cause some crop injury under certain climatic and crop stress conditions. Do not use a surfactant unless possible crop injury is acceptable.