Our garden columnist explores using compounds from living organisms for pest control.
Vegalab is a company that has developed biopesticides that highlight a select group of plant and fungal extracts for their pest control properties.
You can find tea plants, in addition to hundreds or varieties of ornamental camellias, as well as several dozen other camellia species, at Nuccio’s in Altadena. The saponin in tea leaves belongs to a group of botanical compounds that confer resistance to certain insect pests, as well as immunity to bacterial and fungal diseases.
Vegalab is using a by-product of fungus metabolism to combat fungus – powdery mildew fungus, to be precise. Powdery mildew is the most common foliar fungal pest, which may appear as spotty, tactile white growth on virtually any plant when conditions for its proliferation – leaf surfaces that stay moist for several hours in warm temperatures – are present.
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