I've come to the conclusion, after raising hundreds of orchids and and also doing my own hybridising, that there are orchids that naturally repel pests and infections and others that attract them. For example- mealybugs. In my conditions I've discovered that the best control is to toss the orchids that are invaded regularly/ perpetually. I have catasetums that have never had spidermites, and others that I have to preventive spray. Species seem to have a natural resistance. I've disposed of dozens of zygo seedlings that were unusually prone to fungal infections. It seems my hybrid turned off that "gene".
My hope is that one day there is selective breeding, not genetic modification, to enhance/promote the gene/whatever is responsible for this. So instead of prone to insect and disease invasion , its prone to insect and disease resistance. I could live with the latter.
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fine print - anything I say cannot be used against me and ymmv on any growing advice
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