Species Grapholita delineana - Eurasian Hemp Moth - Hodges#3443.1

3443.1

Grapholita delineana Walker, 1863 (1)

Laspeyresia delineana

FWL 4.5-6.5mm (2)

WS 11.5 mm (male), 15 mm (female)

Adult: FW dark brown with two pair of white dorsal strigulae on each forewing. HW are dark brown. Wing pattern is similar to other Grapholita, especially Grapholita tristrigana in eastern North America. The dorsal strigulae in G. delineana are usually narrow and distinctly separated, while those in G. tristrigana may be confluent. (3)

Larva: Similar to other Grapholita. An anal comb is absent. (3)

Introduced. In North America since at least 1943 (Miller, 1982).

Moth Photographers Group – distribution & flight-period chart (2)

Adults are present in mid-May to August in North America. (2)

Larvae feed in the stems and developing seeds of Cannabis sativa (marijuana).

2-3 generations per year. Females lay eggs on the leaves and stems of the host plant. Larvae feed in the stems, on developing seeds, and also on flowers. Infested plants show a swelling in the stem and possibly and entrance hole with extruded frass. Pupation occurs in the soil. (2)

Miller, W.E., 1982. Grapholita delineana (Walker), a Eurasian hemp moth, discovered in North America. Annals of the Entomological Society of America 75(2): 184–186. (abstract)

Walker, F. 1863. Tortricites & Tineites. List of the specimens of lepidopterous insects in the collection of the British Museum, 28: 389. (1)

Moth Photographers Group (2)

BOLD Systems(4)

Tortricids of Agricultural Importance (3)

Agro Atlas.