got a great book on companion planting.not only using horsetail against slugs which i will try as soon as it grows again.chives can cure mildew on squashes, corriander for aphids,spider mites,eucalyptus as a general insecticide,garlic for caterpillars & snails,horseradish as a fungicide for fruit trees,the list goes on.best money ive ever spent apart fron the subscription to g y o.