What is the current recommended practice for removing aphids on outdoor callas? They are a disease transmission vector.
I believe in attracting predator insects to the garden that will eat the aphids, make sure everyone in the chain has something to eat. Or just hose them off. Whats a "disease transmission vector"? Sounds cool.
A disease transmission vector is a living organism capable of carry a disease from one living organism to another. In this case, the individual I am trying to help has lavender that he believes may have a virus. Aphid are capable of carrying lavender virus to other plants that are susceptible to it. The infestation is serious enough that a biological control such as lady bugs will not bring it under control in an outdoor environment. Thank you for your comment but I am looking for something to deal with a serious infestation, then it may be possible to utilize biological controls/a healthy growing environment to maintain the situation. I am always in support of maintaining a healthy environment to minimize plant disease. Sometimes extreme weather can stress plants that are growing in marginal areas and they may need a little help. Callas are marginal in this area.
You could try insecticidal soap, but it will probably kill eating your aphids lady bugs and their larvae, as well.
