SUMMARY The synonymy and distribution of the chrysanthemum leaf‐miner are discussed. The host plants are enumerated, and it is shown that the attacks on chrysanthemums decrease by August, although the flies are still common on other Compositae. A description and comparison of the morphology of the three larval instars is given, and the method of feeding of the larva is discussed. The puparium and emergence of the adult fly are also described, together with an attempt to separate the puparia into sexes by measurement. Some degree of natural control is secured by the parasitism of a braconid on which a chalcid is probably hyperparasitic. A table is included comparing the developmental period of Phytomyza atricornis Mg. and P. chrysanthemi Kowarz.
📖 افتح في inklap 🔗 DOI 📮 اطلب بحثاً