Influence of Light on Flight Activity of Noctuids (Lepidoptera) in South Sweden

Influence of Light on Flight Activity of Noctuids (Lepidoptera) in South Sweden Influence of Light on Flight Activity of Noctuids (Lepidoptera) in South Sweden By BERT PERSSON Department of Entomology, Zoological Institute, Lund, Sweden Abstract In I968 and I969 noctuids were caught by means of a light trap at Bunkeflo, south of Malmo (prov. Scania). Hourly catches were separated. Sex differences in the diel distribution of catch were found. In summer, the males showed their highest activity around midnight. The females then showed a bimodal catch curve with the highest catch be- fore, and a second weaker peak after midnight. In summer, light was found to be the factor govern- ing the nocturnal distribution of catch, in autumn temperature. In I970 observations and experiments on captured moths were performed. Start of flight in the twilight period was found to be induced by the decreasing light. The moths started at higher light values if the temperature during this period was high. In actograph experiments it was found that moonlight has a depressing effect on the ac- tivity of noctuids. Introduction Few authors have paid attention to light as a factor affecting flight activity of noctuids. Larsen (1943), during a period of 12 days in 1939, observed the influence of light on http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Insect Systematics & Evolution Brill

Influence of Light on Flight Activity of Noctuids (Lepidoptera) in South Sweden

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Publisher
BRILL
Copyright
© 1971 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
1399-560X
eISSN
1876-312X
D.O.I.
10.1163/187631271X00220
Publisher site
See Article on Publisher Site

Abstract

Influence of Light on Flight Activity of Noctuids (Lepidoptera) in South Sweden By BERT PERSSON Department of Entomology, Zoological Institute, Lund, Sweden Abstract In I968 and I969 noctuids were caught by means of a light trap at Bunkeflo, south of Malmo (prov. Scania). Hourly catches were separated. Sex differences in the diel distribution of catch were found. In summer, the males showed their highest activity around midnight. The females then showed a bimodal catch curve with the highest catch be- fore, and a second weaker peak after midnight. In summer, light was found to be the factor govern- ing the nocturnal distribution of catch, in autumn temperature. In I970 observations and experiments on captured moths were performed. Start of flight in the twilight period was found to be induced by the decreasing light. The moths started at higher light values if the temperature during this period was high. In actograph experiments it was found that moonlight has a depressing effect on the ac- tivity of noctuids. Introduction Few authors have paid attention to light as a factor affecting flight activity of noctuids. Larsen (1943), during a period of 12 days in 1939, observed the influence of light on

Journal

Insect Systematics & EvolutionBrill

Published: Jan 1, 1971

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