Leaf miners of chrysanthemum.
In the UK, leaf-miners are often found on chrysanthemum and related plants. The commonest species is Phytomyza syngenesiae (Hardy), which is widely distributed throughout the British Isles. It has a wide host-plant range and occurs on cultivated plants, such as chrysanthemum, cineraria, calendula and lettuce, and weeds, such as sowthistle and groundsel. However, alien leaf-miners are sometimes introduced with imported cuttings; these include Amauromyza maculosa (Mall.), Liriomyza huidobrensis (Blanch.), L. sativae Blanch. and L. trifolii (Burgess). In this revised leaflet on chrysanthemum leaf-miners, the authors deal with the injuriousness, morphology, life-history and control of both indigenous and alien species.