How to Treat Spider Mites on Hydrangea
Spider mites are common destructive insects that plague many types of flowers and vegetables, including hydrangeas. They often thrive in warm, dry climates and will eat away at your plants until they are brown, deformed, dried out and nearly dead. Getting rid of the pesky insects can be tricky, but it's important to eliminate them in order to ensure the health of your garden. The best way to get rid of spider mites on your hydrangeas is to keep them moist and to use an insecticide.
Spray the hydrangeas with cool water. The force and weight from the water may be enough to knock the mites off and prevent them from coming back.
Keep the soil moist at all times. Mites prefer dry, hot conditions, so constant moisture will make the plant less appealing to the mites.
Spray the plant with an insecticidal soap to kill off any remaining mites. Repeat the process once a week until all signs of mites go away.
Collect as many ladybugs as you can find and set them free near the spider mites. Ladybugs feed off of small pests such as spider mites but will not harm your plants.
Spider Mites On Roses
Spider mites are pinhead-sized, eight-legged spider relatives. Species commonly infesting roses include twospotted (Tetranychus urticae) and Pacific (T. pacifica). Yellow Pacific spider mites feed on both leaf surfaces. Roses frequently host simultaneous infestations of both mites. As feeding progresses, the leaves become completely yellow or bronze. In high temperatures, large Pacific spider mites populations can distort a rose’s young shoots with their dense webs. This commercially available mite feeds on eggs, larvae and adult spider mites. Some insecticides kill the mites' natural predators and discourage their return with toxic residues. Western predatory mites can safely protect roses from new spider mite attacks after the oils dry.
- Insecticidal soap
- Evergreen Garden Works: Mites
- Garden Seeker: Spider Mites
- Gardenality: USDA/Sunset Zones Climate Conversion Chart
- University of California Integrated Pest Management Pests in Gardens and Landscapes: Roses: Insect and Mite Pests and Beneficials
- University of California Integrated Pest Management Pests in Gardens and Landscapes: Spider Mites Management
- University of Arizona Extension: Twospotted Spider Mite
- Plantwise: Pacific Spider Mite
- University of California Integrated Pest Management Guidelines: Western Predatory Mite