This also provides increased management flexibility later in the season as summer annuals begin to emerge. In Table 2. is a list of labeled preemergence herbicides and their application timings. As always, read, understand, and follow the label supplied with each product. PPI Preplant Incorporated 0-30 days incorporated PRE Premergence Planting time until crop emerges Table 2. Spring System Cleanup Performing regular maintenance of your irrigation equipment includes a pre-season checkup.
Component wear results in less uniform water application, and increased energy use.
In order to reduce the risk that wear will result in untimely breakdowns, worn components should be identified and replaced this spring. Probably the best way to identify worn components such as sprinklers, pumps or irrigation systems is to keep good records. Recording the static and pumping water levels, output pressure, flow rate and energy use on a regular basis provide an excellent means of evaluating pump and motor performance. Each irrigation system will have a number of areas to lubricate, or parts to replace prior to the first irrigation. Each system is equipped with a number of safety switches to shut the system down in the case of failure.