Eurasian Hemp Moth - Hodges#3443.1
Grapholita delineana
This record describes Grapholita delineana (species). Recorded family: Tortricidae. Recorded order: Lepidoptera.
Identification and Appearance
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 )
Classification
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Insecta
- Order
- Lepidoptera (Butterflies and Moths)
- Superfamily
- Tortricoidea
- Family
- Tortricidae (Tortricid Moths)
- Subfamily
- Olethreutinae
- Tribe
- Grapholitini
- Genus
- Grapholita
Imported taxonomy record. Source availability varies; see the source references and editorial policy below.
Habitat and Range
Geographic Range
Introduced. In North America since at least 1943 (Miller, 1982). Moth Photographers Group – distribution & flight-period chart
Seasonal Activity
Adults are present in mid-May to August in North America.
Diet and Behavior
Diet: Larvae feed in the stems and developing seeds of Cannabis sativa (marijuana).
Life History
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.
About Butterflies and Moths: the wider group
Order-level background for Lepidoptera, the group containing Grapholita delineana. Species-specific details appear above.
Group overview
Lepidoptera includes approximately 180,000 described species of butterflies and moths. Moths outnumber butterflies roughly 10:1. The monarch butterfly's eastern population has declined by more than 80% since the mid-1990s, and the western population by over 95% since the 1980s. The IUCN lists the migratory monarch as Vulnerable.
Ecological role of the group
Butterflies and moths are essential indicators of ecosystem health. As caterpillars, they are a primary food source for birds - a single nest of blue tit chicks requires ~10,000 caterpillars. Adult moths pollinate many night-blooming plants.
Economic and practical significance of the group
Lepidoptera are critical pollinators. In Europe, grassland butterfly species have declined by almost 50% since the early 1990s. In the UK, three-quarters of butterflies are in decline. In the U.S., five butterfly species have gone extinct since 1950, with 29 listed as endangered.
Recorded sources for this group: IUCN Red List, Xerces Society, USFWS, PNAS, WWF. Imported estimates may describe particular regions or reporting periods.
Photos of Eurasian Hemp Moth - Hodges#3443.1 (5)
Photo credits: Contributed by Ken Wolgemuth; Additional contributions by Beatriz Moisset , Robert Lord Zimlich , Randy Hardy , Kyhl Austin
Frequently Asked Questions About Eurasian Hemp Moth - Hodges#3443.1
What is Eurasian Hemp Moth - Hodges#3443.1?
Eurasian Hemp Moth - Hodges#3443.1 (Grapholita delineana) is a species in the family Tortricidae, within the order Lepidoptera.
How big is Eurasian Hemp Moth - Hodges#3443.1?
FWL 4.5-6.5mm WS 11.5 mm (male), 15 mm (female)
How do you identify Eurasian Hemp Moth - Hodges#3443.1?
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 )
Where is Eurasian Hemp Moth - Hodges#3443.1 found?
Range: Introduced. In North America since at least 1943 (Miller, 1982). Moth Photographers Group – distribution & flight-period chart
What does Eurasian Hemp Moth - Hodges#3443.1 eat?
The diet of the Eurasian Hemp Moth - Hodges#3443.1 includes Larvae feed in the stems and developing seeds of Cannabis sativa (marijuana)..
When is Eurasian Hemp Moth - Hodges#3443.1 active?
Eurasian Hemp Moth - Hodges#3443.1: seasonal activity - Adults are present in mid-May to August in North America..
What is the life cycle of a Eurasian Hemp Moth - Hodges#3443.1?
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.