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The caterpillars of both the small and large cabbage white butterflies are are the two culprits. The first is pale green with a body up to 2.5cm long, the second is bigger at 4cm and is yellow with black markings. The adult butterflies lay eggs at different times: the small from ...

In spring and summer, pollen beetles fly in from nearby oilseed rape crops to gather in open flowers where they feed on ripe pollen. Mostly, the beetles do little harm although occasionally they may nibble into unopened flower buds and damage the developing flowers of cauliflower...

.Plants are infested with tiny, sap-feeding, scale-like insects packed around the stems and leaves.First try to remove them with your thumbnail. If there are too many, use an insecticidal soap spray. Alternatively, leave them for the birds to pick off. In a greenhouse

These tiny, sap-sucking pests may be only 0.5mm long but they can wreak havoc in a greenhouse or on houseplants indoors. For most of the year they are a pale green colour with two dark spots on their back; it's only in autumn and winter that they turn orange-red. They thrive in h...