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Thrips

By Gardeners' World on 19/10/2011 12:32:09

, or thiacloprid.virtually anything from tomatoes to honeysuckleearly spring to autumnDealing with other garden pestsWoolly aphidsWhiteflyPear leaf blister miteLeafhopper


Scale insects

By Gardeners' World on 18/10/2011 15:56:46

, use the parasitic wasp, Metaphycus helvolus, bought by mail order as a biological control.Use an insecticide containing imidacloprid or thiacloprid in early summer when the insects are more vulnerable.a wide range of plants, house plants, greenhouse


Leafhopper

By Gardeners' World on 18/10/2011 15:25:46

with your other hand. The disturbed leafhoppers should become stuck to the card and can then be disposed of. Alternatively, spray with organic pesticides based on pyrethrum in spring and summer.In spring and summer, use a pesticide containing thiacloprid


Rose leaf rolling sawfly

By Gardeners' World on 18/10/2011 15:54:02

spraying with thiacloprid insecticide, but there's no guarantee that it'll reach the well-protected larvae tucked up inside the leaf tubes. rosesspring, summerCommon problems affecting rosesRose blackspotRose rustRose powdery mildew Rose bloom balling


Whitefly

By Gardeners' World on 19/10/2011 12:38:10

above 10 celsius in the greenhouse you can use a biological control, such as the parasitic wasp, Encarsia formosa, which attacks the juvenile forms of whitefly.Sprays with products containing imidacloprid and thiacloprid, which are absorbed by the plants


Sooty mould

By Gardeners' World on 19/10/2011 14:13:13

are your best allies. Ladybirds can be bought as a biological control, and you can also buy ladybird houses to encourage these helpful creatures to take up residence in your garden. They need time to tackle the problem, so don't expect them to hoover up


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