Heritage G would be a good option to put down first as a preventative fungicide. Clearys 3336 DG is also labeled both as preventative and curative but works better as a curative fungicide. Please be sure to review the product labels for more information and complete application instructions before use.
Heritage G Product Label
Clearys 3336 DG Product Label
Heritage G Fungicide is a Group 11 Fungicide and Clearys 3336 DG Lite Granular Fungicide is a Group 1 Fungicide - the same as Clearys 3336F. You can make two applications of one and then rotate to two applications of the other and then back to the first one, or you can rotate to another fungicide like Pillar G Intrinsic Granular Fungicide which is a Group 3 and 11 Fungicide.
According to the Clearys 3336 DG Lite Granular Fungicide product label, when applying this product to prevent cool season brown patch it should be applied in the fall before turf has stopped all growth activity. A second application should be made in early Spring when soil temperatures reach 55-60 degrees Fahrenheit or when the disease first appears.
As long as Clearys 3336 DG Lite Granular Fungicide is applied as directed on the label there should be no issue applying around the time of other products.
Clearys 3336 DG Lite Granular Fungicide is not specifically labeled for crown rot.
We would recommend using Monterey Agri-Fos Systemic Fungicide is labeled for crown rot and can be used on ornamentals. You will use 1 tsp.-2 oz. per gallon of water. It can be used as a foliar spray, soil drench, soil incorporation, basal bark application and bare root dip.
Clearys 3336 DG granules are only labeled for use in commercial horticultural applications for evergreens. There is a liquid formulation called Clearys 3336F which is labeled for evergreens. One quart should easily treat your small trees, but how much you apply will depend on what disease you are treating. Per the product label:
"For soil drench applications,best crop protection is achieved with preventative treatments repeated every 21-28 days.For foliar applications, begin treatments when disease first appears, or during suspected periods of disease incidence. Apply additional applications every 7-14 days or as otherwise instructed for the prevention or control of the listed diseases."
We do sell Hi-Yield Dormant Spray Oil in several sizes as well.
Yes, any vegetables or fruits that have been treated with Clearys 3336 DG Lite Granular Fungicide should be discarded, and nothing should be eaten from the treated plants for at least 1 year after application.
There are no products on the market in the USA that are labeled for earthworms as they are largely beneficial creatures. There are a few known control methods that include cutting back on irrigation so that the worms will go deeper into the soil for the moisture they require to survive or fertilizing your lawn after a heavy rainfall which will eliminate some of the population. Clearys 3336 DG Lite is a fungicide and has not been tested to kill earthworms
You will want to apply 3336 DG Lite Granular Fungicide on your lawn between the temperatures 65-85 degrees, in order to prevent scorching.