Inspect new growth of fruit trees, onions and garlic for aphids. Aphids are viviparous, which means females lay live babies not eggs – and the babies begin reproducing in a week! These sap suckers weaken the host plant, transmit viruses, and sooty mould grows on the honeydew they secrete. For small clusters, squash them with your fingers. Soapy dish-washing water splashed over onions and garlic works well. Organic sprays include Grosafe Enspray 99 Spraying Oil, Organic Insect Control from Kiwicare and Nature’s Way Pyrethrum from Yates.