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or they'll fly off.At the first sign of attack, spray plants with imidacloprid, thiacloprid or sunflower oil. Treatment is more effective on larvae than adults.lilies, fritillaries and Solomon's sealspring, summer, autumnMore common garden pests

are very effective, but compost with the chemical imidacloprid controls the larvae for up to a year. Other formulations provide just short-term protection.many plants, container-grown plants are especially vulnerableall year roundMore common garden pests

be used on houseplants and in greenhouses to attack the western flower thrips. Organic pesticide sprays are available, which are based on plant oils or pyrethrum.Ornamental plants can be sprayed with insecticides containing imidacloprid with methiocarb

, 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