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2022 Willamette Valley Pest Management Guide for Walnuts

Summary

This guide lists recommendations for insect, mite and disease control in walnut orchards. The chemicals, formulations and application rates listed here are based on label directions, research and orchard experience. Pest management depends on producers and their knowledge of the orchard and its characteristics. Producers must weigh several factors: cultivar, tree size, tree density, canopy characteristics, pest complex and pest history. Consider all these factors when choosing which chemicals to apply and at what rates. Other variables include the amount of water used per acre and the method of application. Trade name products are mentioned as examples only. Occasionally, manufacturers register different formulations of a product that contain a different concentration of active ingredient. This does not mean that OSU Extension either endorses these products or intends to discriminate against products not mentioned. Consult product labels to determine whether their use confers advantages over the products listed in this guide.