Two-spotted spider mites are one of the most common pests found in greenhouses and gardens.
For control, we recommend two different species of predatory mites: persimilis and fallacis, and also the small beetle Stethorus.
P. persimilis are recommended to start as a treatment vs prevention.
Persimilis is the main predator of spider mites and is the only one that will go directly into the webbing to eat them. They do best at a humidity of at least 60%, or you can help by misting your plants twice daily to keep the environment humid (pest spider mites love dry conditions). It may be necessary to reintroduce them after 7-10 days if you’re dealing with a heavy infestation, or conditions are sub-optimal.
Helpful Hint: One thing to be sure of before introducing persimilis (or any other type of beneficial bug) is that you have no pesticide residues on your plants. If you have used a pesticide even 4-8 weeks earlier, you need to tell us to see if you will have created a hostile environment for the beneficials to work well in.
1,000 Mites in vermiculite (for areas ~500 square feet)
2,000 Mites in vermiculite – smaller “hot spot” vial (for ~500-1000 sq. feet)
3,000 Mites bean leaves (contain pest spider mites as food during transit)