J.m. from Broomallm, Pa writes
Arborists have identified this elm as healthy, although a larger one 40 ft. away recently died of DED. I plan to purchase 5 Chemjet injectors and treat according to instructions. Is 1 quart of the fungicide sufficient or do I need a gallon; and if I purchase a gallon is its shelf life long enough to use again in 2-3 years?
Per the label you will need to use 6 – 10 ml of Quali-Pro Propiconazole 14.3 in up to 1 liter of water per inch of Diameter at Breast Height (DBH). Since your tree has a circumference of 90", that equals 28.6" of DBH, you will use 172 – 286 ml (5.8 oz – 9.7 oz) in approximately 28.6 liters of water. See page 18 of the product label. A quart should be enough product and it does have a shelf life of 3-5 years as long as it’s stored in a cool dry place. We do not recommend making an injection treatment, unless you’re an arborist or are knowledgeable with the equipment needed for this type of treatment.
Answer last updated on: 07/26/2018
