Caroline from San Pedro Ca writes
Avocado expert John Cornel says it is necessary to use a buffered phosphorous acid product when injecting Avocado trees to treat phytophtora diseases. Do you agree?
Per the manufacturer, Monterey Garden Phos Systemic Fungicide is not buffered. Also, one of the experts at Monterey confirmed that the product does not have to be buffered. One of their owners has actually been dealing with the AG industry in California where a lot of avocados are being grown and has been selling this product for injecting avocados. It is labeled for this use and will do the job.
Answer last updated on: 06/13/2018