Abstract
Larvae of species of the genus Cydia (Lepidoptera: Tortricidae) have been frequently detected on Chinese chestnut fruits imported from China. The authors observed that two species of Cydia fed on the chestnut fruit in China, i.e. Cydia glandicolana (DANILEVSKY) and C. kurokoi (AMSEL), which have hitherto been designated incorrectly as C. splendana (HÜBNER) by the Chinese authors. The adults and larvae of the two species were described. Of the two species, Cydia glandicolana seems to be a more dominant pest in China, because only C. glandicolana individuals were collected from the fruits during the plant quarantine inspection in Japan. Two other Microlepidoptera, Eucoenogenes aestuosa (MEYRICK) (Tortricidae) and Conogethes punctiferalis (GUENÉE) (Pyralidae), boring in chestnuts are also distributed in China. The characters enabling to distinguish the larvae of the four species were presented.
