I plant tagetes, basil and nasturtiums around my tomato plants. I have seen 1 of those tomato hornworms in a pepper plant once last year. So I guess is either I am lucky or the rotations/companion planting are working or both. I have not seen spider mites near my tomato yet. Slugs are somewhat present but does not seem to bother my tomatoes so far.
I try to do companion planting and rotation but I am very much interested in Allelopathy to help me since I use organic growing methods.
I read today in my Mother Earth News magazine that horseradish deters Colorado Potato Beattle...I have been lucky that CPB have not found my potato plants yet.
I found that the beds that had brassicas before potatoes in my rotation had no wireworm damage and later I found some publications that the brassicas releases some compounds into the soil that wireworms don't like.
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Wendy
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