Spider mites Tetranychidae
scouted Oct. 2, 2025
- Scientific Name
- Tetranychus sp.
- Background
- Soybeans in Granville County were being scouted, and it was observed that in 35% of the field there were stunted plants and plants with malformed leaves. There was a suspicion of herbicide injury, and a sample was submitted to the PDIC for diagnosis.
- Conclusion
- This issue was confirmed by the NC State Plant, Disease, and Insect Clinic as injury from spider mites. Spider mites pierce individual cells of the plant and consume the inner contents, killing this cell and those around it. As a result, the symptomology associated with spider mites can include visible specks of white, yellow, or brown stipples on the leaves, and in severe cases, the dropping of injured leaves. Spider mites are more of a problem when conditions are hot and dry. It is important to note that spider mites are not insects, so it is crucial to consult any recommended insecticide labels. Continued scouting is recommended, along with following the general principles of IPM.
- Resources
