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- Title
SOME OBSERVATIONS ON THE MORTALITY OF PRISTIPHORA ABIETINA (CHRIST) AND OTHER SPRUCE NEMATINI DURING THE OVIPOSITION PERIOD, AND ON THE EFFECT OF TEMPERATURE ON FLIGHT INTENSITY.
- Authors
Petersen, B. Beier
- Abstract
Climate or "weather" as a mortality factor in insect populations is briefly discussed. Field observations on the flight of Pristiphora abietina (Christ) and some other spruce sawfiies were carried out in 1955 and 1956. Flight occurred at temperatures from 11°-13°C and above. The peak of flight and oviposition took place at temperatures of about 18° and above. In both years thunder-rain seemed to cause heavy mortality among the sawflies and thereby brought the flight period to an end. Some other examples of mortality caused by climate in P. abietina are discussed.
- Subjects
PRISTIPHORA; MORTALITY; TENTHREDINIDAE; SPRUCE; PINACEAE; HYMENOPTERA
- Publication
Oikos, 1960, Vol 11, Issue 1, p72
- ISSN
0030-1299
- Publication type
Article
- DOI
10.2307/3564884