I'm looking to buy ladybirds (or larvae) to control greenfly on roses. They have all disappeared from our garden in recent years. Is this advisable? If so, what kind of ladybirds should I look for and where might I get them?
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Over ten years, Gerry Daly answered more than 5,000 gardening questions. His knowledge is based in science and practical experience, and by working on radio and television. Access to the advice database is open
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