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Any ideas for the control or eradication of Red Spider Mite in my conservatory?
It is only for ornamentals.
Datura, Hibiscus and Bouganvillia.
- How do I get rid of spider mite? - What are the little red spots on my Lotus, Black Eyed Susan, Yucca and Gloriosa? - What are the spider webs on my ginger lilies?
There are a number of cultural practices that you can also use to help prevent and reduce outbreaks. Spider mite thrives in warm dry conditions, so damp down greenhouse floors and paths to increase the humidity. Regular inspection of the undersides of leaves will also help to detect the problem before it spreads. Pick off and burn any infested leaves when you find them. Finally, at the end of the growing season, make sure that you take time to really clean out your greenhouse properly as spider mites like to spend the winter hidden in dry crevices and plant debris until the weather warms up again in spring.
Having used that predator mite (ie Phytoseiulus persimilis) myself, I can confirm it works. It's really the only way of completely eradicating red spider mite from a conservatory as they have evolved to be immune to the sort of pesticides we gardeners have available. SB plant invigorator (which doesn't contain pesticide) will also help to control them by sort of glueing them in place. In fact, many of the predator suppliers will recommend that you use that a couple of weeks before you introduce the phtyoseiulus. Not cheap, but they do exactly as it says on the tin (or small plastic bottle in this case!)