There are currently only 10 herbicide active ingredients registered in California for use in bearing avocado groves. Growers rely heavily on glyphosate, which is under political scrutiny, paraquat is a restricted use herbicide and with probable registration loss of simazine due to significant ground water contamination issues California avocado growers need of alternative herbicides. This study has provided critical, science-based information to the California Avocado Commission and herbicide registrants to pursue additional product labels. The objectives of this study were: 1. Determine the safety and efficacy of herbicides currently registered for citrus for use on bearing avocado. 2. Identify both pre and post emergent alternatives to glyphosate and simazine.