John from San Rafael, Ca writes
I understand Propiconazole 14.3 can be used for foliar treatment for Anthracnose but my ornamental pear is tool big for me to reach it all with a sprayer. I prefer to not call an arborist for an injection. Would a bark spray on the trunk be effective? If so, the several large branches start at 4 feet so would I spray them too? As high as possible? The DBH is 23. How many ounces per how many gallons water?
The Propiconazole 14.3 Fungicide Product Label states for anthracnose on ornamental plants: Mix 2-4 fl. oz. of Quali-Pro Propiconazole 14.3 in 100 gals. of water and apply as a full coverage spray to the point of drip. Apply every 14-21 days during the period of primary infection. If disease is present, tank mix with an EPA-registered contact fungicide.
Think of treating foliar diseases such as anthracnose like you would treating a rash or preventing yourself from a sunburn on your skin. If you cannot make full coverage to all your skin with the protective or curative product where the issue is occurring or might occur, then the treatment is not impacting those areas. Propiconazole is not generally seen as a systemic product and tree injection is not suggested for that disease anywhere on the label other than a specific application for prevention of anthracnose in sycamore trees. Drenching or injecting in this case would not solve the particular disease issue you have since it has to be treated directly on the surface where the spores of the disease are found. You likely will need to invest in a sprayer that provides the reach you need for your current tree size, and that will allow you to reach it as it continues to grow; or you may need to hire someone with a spray rig that can do the full foliar application that is required for that type of disease treatment.
Answer last updated on: 05/02/2022
