Whitefly are the scourge of greenhouse gardeners, the presence of which is indicated by white scales on the underside of the leaves and quite often, a white cloud of flies will take to the air if an infested plant is touched. Affected plants can develop viruses and sooty mould as the sap-sucking experts secrete honeydew onto leaves. It's not just greenhouse growers who need to watch out for this airborne pest; you'll find brassicas are equally at risk during the summer months.Read More
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