KEYS    About TortAI    Fact Sheets    Glossary    ID Thumbnails    DNA Search    Dissection Guides Cydia glandicolana << Previous Next >> Port Interception Target - Larva Cydia glandicolana (Danilevsky) (Tortricidae: Olethreutinae: Grapholitini) Fig. 1: Male Fig. 1: Male Fig. 2: Female Fig. 2: Female Fig. 3: Female Fig. 3: Female Fig. 4: Male genitalia Fig. 4: Male genitalia Fig. 5: Female genitalia Fig. 5: Female genitalia Adult Recognition FWL: 6.5-10.0 mm Forewings are gray, darker basally, with a subtriangular dorsal patch proximal to the ocellus. Hindwings are grayish brown. Other similar species include Cydia splendana and Cydia kurokoi. A dark patch surrounds the ocellus on the distal one-third of the forewing in both of these species. A genitalic dissection can be used to confirm identity. Larval Morphology Late instar larvae are approximately 17 mm in length. The abdomen is yellowish red with concolorous inconspicuous pinacula. The head is yellowish brown and the prothoracic shield is pale yellow brown with mottling along the posterior margin. An anal comb is absent. Other tortricid Castanea pests include Cydia fagiglandana, Cydia kurokoi, Cydia splendana, Fibuloides aestuosa, and Pammene fasciana. Brown and Komai (2008) provide a description and key to larvae of these species. Cydia glandicolana larvae can be distinguished by the following characters: reddish abdomen with inconspicuous pinacula; D2 pinacula fused to each other on A9; distance between V setae on A9 greater than on A8; 19-26 crochets on abdominal prolegs; anal comb absent.  Biology Cydia glandicolana completes one generation per year. Adults are present July through September. Larvae feed within chestnuts and acorns. Overwintering occurs in leaf litter as a late instar. Host plants This species is a pest of chestnut in China. In Japan it has only been recorded feeding on oak. Family Genus/species Common name Fagaceae Castanea mollissima Blume Chinese chestnut Fagaceae Castanea Mill. chestnut Fagaceae Quercus dentata Thunb. Daimyo oak Fagaceae Quercus mongolica Fisch. ex Ledeb. mongolian oak Fagaceae Quercus serrata Thunb. bao li Fagaceae Quercus sp. oak Distribution Cydia glandicolana is distributed throughout China, Korea, and Japan. There are also records from southeastern Russia. References Brown, J. W. and Komai, F. 2008. Key to larvae of Castanea-feeding Olethreutinae frequently intercepted at U.S. ports-of-entry (Lepidoptera : Tortricidae). Tropical Lepidoptera Research. 18(1): 2-4. Komai, F. and K. Ishikawa. 1987. Infestation of chestnut fruits in China with two species of the genus Cydia (Lepidoptera, Tortricidae). Japanese Journal of Applied Entomology and Zoology. 31: 55-62. [in Japanese] Meijerman, L. and S. A. Ulenberg. 2000. Arthropods of Economic Importance: Eurasian Tortricidae. Arthropods of Economic Importance series. ETI/ZMA. Tortricids of Agricultural Importance by Todd M. Gilligan and Marc E. Epstein Interactive Keys developed in Lucid 3.5. Last updated August 2014.