Did you make the mix yourself? If so, was the pine bark composted? If it was not, that could be the source of your problems. Also, some kind of mulch would help any splash if your mix is contaminated.
If your plants are not healthy, then they would attract more insects whose role is to eat diseased and sick plants, much like wolves eat the old, sick, and weak elk.
What can be done? Are you an strict organic grower, or a whatever works best to get the result grower, as the aids and tricks vary to the method you use to grow.
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