Not visible to naked eye; mite can be seen with a 20 power hand lens. It is white and pear shaped. Not classified as an insect.
Tomato and potato.
Lower stems become bronze, or russet; damage spreads up the plant and to underside of leaves; fruit may become bronzed.
The tomato russet mite is most common in California, but localized infestations have been scattered over the United States.
Keep plants watered and growing vigorously.
Insecticidal soap, horticultural oil. Phytoseiulus persimilis and Amblyseius californicus are two of the several predatory mites commerically available for russet mite control.
For Tomatoes: Treat with a registered acaricide. Repeat as needed. Follow directions on label.
Notice: Because pesticide labels can change rapidly, you should read the label directions carefully before buying and using any pesticides. Regardless of the information provided here, you should always follow the latest product label when using any pesticide. If you have any doubt, please contact your local Extension agent or pesticide dealer for the latest information on pesticide label changes.
Disclaimer: Commercial products named on this site are for informational purposes only. Virginia Cooperative Extension does not endorse these products and does not intend discrimination against other products which also may be suitable.
Prepared by Alexandra Spring and Eric Day (Modified from a publication by the USDA)