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the problem long-term but deals with the aphids in the short-term.Spray the tree with thiacloprid the moment you spot any aphids. Small numbers are far more easily tackled than large, rapidly multiplying infestations.apples, crab apples, cotoneaster, hawthorn

of yellow-green or red.If the symptoms were evident last summer, in winter get rid of the eggs by spraying plants with an enzyme wash, which will quickly dissolve them. In spring, spray plants with the systemic insecticide thiacloprid or pyrethrumn to kill

, which can encourage sooty mould to develop. It's more of a problem in urban areas where temperatures are higher.Scrape the eggs off by hand and move them to an alternative tree, or destroy them.Spray with an insecticide containing imidaclprid

and squish them.Again, there's no real need to control the beetle, but you can kill them by spraying with a bug spray that contains imidacloprid or thiacloprid. Both imidacloprid and thiacloprid are systemic pesticides, meaning they are absorbed

, sugary substance (called honeydew) which encourages the growth of a fungus called sooty mould. Early summer is the best time to tackle the problem, when the newly hatched insects are crawling around looking for a place to feed and settle