![]() Long-term effect of biological soil disinfestation on Verticillium wilt. References Goud, J.C., Termorshuizen, A.J., Blok, W.J. Note Although Phyton 27 is registered as a spray it is not recommended based on a single trial where it was ineffective when used before or after infection. Do not inject trees less than 2 inches in diameter or that are suffering from various stresses. A few chemicals are registered for tree injection as a preventative treatment.Immediately roll the soil and follow up with tarps or a light watering. Preplant fumigation has been effective for short-term crops such as annuals or perennials grown for a season or two but not for long term perennials grown for multiple years in the same locations.Effect was observed up to 4 years after planting.Ĭhemical control Research in California and Florida has not identified any nonfumigant chemicals or microbial based products that provide consistently effective control of Verticillum wilt of strawberry (the same disease of maple). Incorporating freshly mown Italian ryegrass followed by covering the soil with plastic for 3 months in the late summer was effective in the Netherlands at reducing disease incidence in a nursery crop of Norway maple planted 6 months later.A preplant soil test for Verticillium propagules will help determine a planting site.Avoid fields previously planted to potato or tomato however, former peppermint fields may be lower risk. Avoid planting maple in fields with a history of Verticillium wilt.If the tree dies and/or is removed, replace it with a nonsusceptible host such as any conifer, birch, dogwood, or sycamore.Keep nitrogenous fertilizers to a minimum-enough only to produce normal, not succulent, growth. ![]() Clean boots, equipment, and tools before leaving an infested area.
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