New Miticide For California Greenhouse Growers

California greenhouse growers can add a new miticide to their integrated pest management (IPM) program. TetraSan, marketed by Valent Professional Products, has now received registration from both the United States Environmental Protection Agency (EPA) and the California Department of Pesticide Regulation (DPR).

This new miticide chemistry gives growers the extended residual activity and translaminar movement to eliminate spider mites on flowering and foliage crops, ground covers, shrubs and ornamental trees. It also offers control through both contact and translaminar activity. TetraSan’s unique translaminar movement allows the product to penetrate the upper surface of the leaf and be ingested by mites feeding on the underside of the plant. Because of this, TetraSan provides control of spider mites on the underside of the leaves without the mites coming in direct contact with the spray residue.

“The translaminar action makes application more convenient,” said David Frye, Valent Professional Products market manager. “It is hard to get good underleaf spray coverage on many ornamentals, but TetraSan can control spider mites even if the product isn’t sprayed to the underside of leaves.”

TetraSan can provide growers with extended residual activity to control spider mites for up to five weeks. This gives growers the same spider mite control with fewer applications. Selective to mites, TetraSan does not harm most beneficial insects.

“Every grower is looking for something that will last a little longer,” said Jack Schlesselman, Valent field market development specialist. “Economically, it allows them to increase the time between applications, saving both time and money for the grower.”

Because of the spider mite’s short lifespan, resistance to commonly used insecticides can become a problem for growers. TetraSan is a new chemical class, and its unique mode of action makes it a great resistance management tool. The product can be rotated with all currently registered miticides to decrease the risk of resistant spider mite species.

A molting inhibitor, TetraSan affects spider mites at all life stages. It stops the development of eggs and larvae, while sterilizing the adults. TetraSan is most effective when applied to plants with low mite populations. If mite pressure on the plant is high, a second application can be made as soon as 14 days after initial treatment, or the product can be tank mixed with an adulticide.

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