You would use between 1-2 oz of Chlorothalonil 720 SFT Fungicide per gallon of water for needlecast on spruce trees, spraying all current damaged areas and surrounding foliage to protect the tree.
Chlorothalonil 720 SFT is not specifically labeled to be winter squash (butternuts) or used on greenhouse grown crops.
The amount of Chlorothalonil 720 SFT that you will need to use cam vary depending on what you are treating for. Please consult the product label to find the appropriate rate for your needs.
Chlorothalonil 720 SFT Fungicide is not labeled for use on home lawns. If you are treating commercial turf such as golf courses, then you could apply this after cutting or seeding. Please let us know if you need assistance selecting fungicides for your home lawn.