Sprinkling flour over ripening berries or tomatoes helps to keep bugs off them. The egg shell really do work - I used them for the first time this year. For potatoes I've read that horsetail works really well for blight - you have to let it soak in water for a day or two and then spray the plants with it - I don't know for sure how well it works because I haven't had to use it myself yet - thankfully all my spuds are blight free for the moment
Lisa xx
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