FALSE SPIDER MITES
The eggs are somewhat flattened and red, and are sometimes ridged. False spider mite larvae are the size of the eggs and only have six legs at this stage. The protonymphs resemble adult mites in shape and have eight legs. The deutonymph, the last stage before the adult, is as large as adult false spider mites and it has eight legs. But this stage has no genital opening.
With their needle-sharp mouthparts, false spider mites puncture the epidermis of the host plant and suck out the juices. This causes a pale spot which may later turn brown. Infested shrubs slowly turn reddish-brown and appear to have "winter injury". This damage resembles that of spider mites but the onset of symptoms is much slower.
Female false spider mites lay eggs which take 20 to 21 days to hatch at room temperature. Larvae hatch from the eggs and feed for about two weeks before molting into protonymphs. After 15 days of feeding, the protonymphs molt into deutonymphs. Two weeks later, the deutonymphs molt into adult mites. Incubation and development are slower outdoors in cold weather. There are 4 to 6 generations per year (18 to 36 generations of spider mites per year).
Be sure to read and follow the directions for safe application found
on the label.
|*horticultural oil||(Sunspray, Ultra Fine, others)|
|*soap||(Insecticide Concentrate, M-Pede, others)|
|abamectin||(Avid)||tends to work better in combination with hort oil|
|disulfoton||(DiSyston)||granular (many uses discontinued)|
|pyridaben||(Sanmite)||greenhouse and nursery|
|spiromesifen||(Forbid)||4F Outdoor landscapes only|
|spiromesifen||(Judo)||Greenhouse and Nursery|
Useful Links: Floricultural mites in Canada
For assistance, contact your county North Carolina Cooperative Extension Service agent.
Recommendations for the use of chemicals are included in this publication as a convenience to the reader. The use of brand names and any mention or listing of commercial products or services in this publication does not imply endorsement by the North Carolina Cooperative Extension Service nor discrimination against similar products or services not mentioned. Individuals who use chemicals are responsible for ensuring that the intended use complies with current regulations and conforms to the product label. Be sure to obtain current information about usage and examine a current product label before applying any chemical.
Published by North Carolina Cooperative Extension Service Distributed in furtherance of the Acts of Congress of May 8 and June 30, 1914. Employment and program opportunities are offered to all people regardless of race, color, national origin, sex, age, or disability. North Carolina State University at Raleigh, North Carolina A&T State University, U.S. Department of Agriculture, and local governments cooperating.
Originally prepared by: James R. Baker & S. Bambara, Extension Entomologists
ENT/ort-47 September 1994 (Revised)May 1997
Web page last reviewed January, 2011 by the webperson.