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Oil Properties    Pest Control   Disease Control   Bloom Delay  Blossom Thinning   Physiology/Phytotoxicity

Oils may prevent disease formation by coating the plant surface and impeding or suffocating fungal spores.
mildew on dogwoodNorthover and Schneider reported in 1996 that petroleum, canola and soybean oil sprays were active as pre-lesion treatments and antisporulative on powdery mildew of greenhouse grown grapes.

     We have conducted greenhouse and field trials demonstrating that soybean oil sprays can reduce the occurrence of powdery mildew on dogwoods.

Disease Gallery

Abstracts:pdf files Adobe Acrobat Reader is required!
Comparison of petroleum and vegetable oil formulations for management of powdery mildew.

Management of powdery mildew on flowering dogwood with soybean oil


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