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Whitefly Control: Natural Enemies and Non-Chemical Solutions

Identifying Whitefly Infestations

Touch an infested plant and a cloud of tiny, white, winged insects rises. Leaf undersides reveal adults, stationary pupae, and nymphs. Both adults and nymphs suck plant juices, causing yellow stippling to browned, curled foliage. Honeydew excretion attracts ants and fosters sooty mold.

Biological Control

Parasitic wasps naturally suppress whiteflies. For severe infestations, purchase and release wasps—Encarsia formosa is most common. Consult your Cooperative Extension Office for region-specific recommendations. Strong water jets also dislodge pests.

Why Chemical Control Fails

Insecticides poorly penetrate pupae and nymphs; more adults escape than are killed. Beneficial wasps die disproportionately, causing pest populations to increase. Chemical control is not recommended.

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