This spraying regime is to continue until the end of August. Unfortunately, continuous use of copper-based bactericides lead to a buildup of copper in soil and can be related to yield loss in walnut orchards. A natural antibiotic produced by a strain of Streptomyces by the name of kasumin or kasugamycin has been found to have high efficacy against Xanthomonas arboricola pv.
This spraying schedule is intended to last until the end of August. However, continuous application of copper-based pesticides can cause copper to accumulate in soil and may be associated with yield loss in walnut orchards. A naturally produced antibiotic from Streptomyces, known as kasumin or kasugamycin, has been found to have high effectiveness against Xanthomonas arboricola pv.