Cydia nigricana

(Fabricius, 1794)

Pea Moth

Cydia nigricana, commonly known as the pea , is a small moth to Europe and to North America. The is a significant agricultural pest whose develop inside pea pods, feeding on developing seeds. emerge from in early summer and are monitored using traps for . The species exhibits strong male response to synthetic , with peak activity occurring in late afternoon and evening hours.

Cydia nigricana by (c) Laura Gaudette, some rights reserved (CC BY), uploaded by Laura Gaudette. Used under a CC-BY license.

Cydia nigricana by (c) Dave, some rights reserved (CC BY), uploaded by Dave. Used under a CC-BY license.

-1257- Cydia nigricana (49960731653) by Ben Sale from Stevenage, UK. Used under a CC BY 2.0 license.

Pronunciation

How to pronounce Cydia nigricana: /ˈsɪdiə nɪɡrɪˈkɑːnə/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Distinguished from similar Cydia by the herringbone pattern of and spots on the edges. The relatively long compared to body size is a notable feature. traps baited with (E,E)-8,10-dodecadienyl acetate are used for species-specific . Larval presence is detected by damage to pea pods, which may develop yellow coloration and ripen prematurely.

Images

Habitat

Agricultural fields cultivated with pea (Pisum sativum). In Europe, found in a range of agricultural settings from conventional to . Larval is restricted to developing pea pods.

Distribution

to Europe, including Austria, Belgium, Britain, Bulgaria, Czechoslovakia, Denmark, Finland, France, Germany, Hungary, Ireland, Italy, Netherlands, Norway, Poland, Portugal, Romania, Spain, Sweden, and Switzerland. Also recorded in Japan and Russia. to North America, where it is established in Canada (Maritime Provinces, British Columbia, Ontario) and the United States. First recorded in Canada in 1893.

Seasonality

from sites begins in early June and continues through summer. Peak activity occurs between 16:00-18:00 hours, with maximum activity around 17:04. In Finland and Germany, flight activity has been recorded from June through July. Larval development occurs from late June to August. Field threshold temperature for adult take-off is 18°C.

Diet

feed exclusively on developing seeds within pea pods (Pisum sativum). Each larva typically consumes 1-2 peas per pod. plants also include vetch, clover, and lentils, though peas are the primary cultivated host.

Host Associations

Pisum sativum - primary Garden peas and field peas; feed inside developing pods
Vicia - Vetch
Trifolium - Clover
Lens culinaris - Lentils

Life Cycle

Overwinters as mature in soil . occurs in spring, with emerging from cocoons buried just below the soil surface beginning in early June. Adults feed on pea flowers before mating. Females lay 1-3 on undersides of leaves, , stems, and flowers. Eggs hatch in 7-10 days (or 1-3 weeks depending on temperature). Larvae undergo brief wandering stage (approximately 1 day) before entering pea pods. Larval development lasts 18-30 days, with up to 5 . Mature larvae exit pods in August and descend to soil to spin cocoons incorporating soil particles.

Behavior

Males exhibit strong positive anemotactic response to female , flying upwind toward sources. Close-range orientation involves sustained anemotactic even when flying down concentration gradients. activity is temperature-dependent with minimal activity below 12°C and threshold for take-off at 18°C. are capable of dispersing several kilometers by low flight above vegetation in winds up to 10 km/h. Males are not captured in suction traps above 0.4 m height, indicating low-altitude flight behavior.

Ecological Role

Agricultural pest of pea . In European range, are partially regulated by natural including three that can achieve up to 60% . In North range, absence of these parasitoids has led to population and severe crop damage. Serves as for larval parasitoid Glypta haesitator.

Human Relevance

Significant economic pest of pea production. In Canada, of 10-50% are common, with exceeding 75% damage. In Ontario, caused abandonment of mid-season pea . Management relies on systems to time , with recommended 10-15 day delay after sustained trap catches to target hatch. Alternative control methods include netting, early-maturing , and cultivation of mange-tout where pods are harvested before pea development. The Royal Horticultural Society discourages use due to harm to .

Similar Taxa

Cydia pomonellaBoth are Cydia with similar and pest status, but C. pomonella attacks apples and pears rather than legumes, and has distinct patterning without the herringbone spot arrangement.
Cydia latiferreanaFilbertworm is congeneric but associated with hazelnut and oak acorns; lacks the distinctive edge pattern of C. nigricana and has different association.

More Details

Pheromone monitoring

Triangular-shaped traps with 'Bird-Tanglefoot' adhesive and (E,E)-8,10-dodecadienyl acetate lures are most effective for . Optimal trap height is three-quarters of height. Multiple trap reduce variability in catch data compared to single traps.

Population dynamics

Local abundance increases linearly with pea-cropping area in the previous year within 4 km . Risk assessment models indicate that distances of 500 m between current and previous-year pea fields significantly reduce and in early-flowering .