Gardening Articles: Edibles :: Small Fruits & Berries

New Biopesticide Controls Tomato Blight and Mildew

by Charlie Nardozzi


Home gardeners are always looking for the best and safest way to control disease in their gardens. Recently there has been great interest in using naturally occurring microorganisms to combat fungi and bacteria that attack plants. Now, there’s another weapon in the arsenal.

Regalia is a biopesticide made from giant knotweed (Reynoutria sachalinensis) extracts. Researchers have found this common weed has compounds that are effective in controlling a broad range of diseases, such as early and late blight, bacterial speck, rust, and powdery and downy mildew. It is available for use on vegetables, fruits, and ornamentals. Regalia works by stimulating the plant’s natural defenses to produce “antibodies” that make the cells less likely to succumb to attacks from bacteria and fungi. In tomato trials at the University of Florida, Regalia outperformed other pesticides, including another biopesticide, Serenade, in controlling early blight on tomatoes.

For more information on this new, safe pesticide, go to: Marrone Organic Innovations.

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