Follow directions for best results. Many gardeners claim sprays do not work. The chemical must reach every leaf crotch to abort flowers. Excessive growth prevents proper coverage, so thin out the growth before applying the spray. If you don't like chemicals, douse the olives and mulberries with water early each day.
Moisture clots the pollen from becoming airborne and washes off other pollutants.
Fertilize and mow Bermuda grass often to cut off pollen-producing flower heads. Also, keep Bermuda well watered, as it responds to drought by producing more seed heads. Never allow weeds such as common Bermuda, pigweed, rabbit brush, common ragweed and tumbleweed to go to seed. You'll find these weeds in vacant lots and alleys all over town. Clip off flowering stalks on shrubs to get rid of any pollen they may release.