caa a22 4500 388036362 CHVBK 20180307125005.0 cr unu---uuuuu 161130e199810 xx s 000 0 eng 10.1017/S0007485300026067 doi S0007485300026067 pii (NATIONALLICENCE)cambridge-10.1017/S0007485300026067 Flight initiation and flight activity in Prostephanus truncatus (Coleoptera: Bostrichidae) [Elektronische Daten] In an outdoor experimental set-up, the number of Prostephanus truncatus (Horn) flying from maize cobs was recorded over 38 observation weeks. Flight activity in the field was recorded for 50 weeks with three pheromone traps, each placed at c. 100-300 m from the first experimental set-up. Multiple regression analyses revealed that both flight initiation and flight activity were partly influenced by mean temperatures, but were not directly related. Flight initiation was mainly dependent on population density. An additional experiment showed that sex ratios among pheromone trap catches were not correlated with the number of beetles caught; sex ratios were female-biased throughout the year. Seasonal fluctuations in flight activity recorded with pheromone traps are mainly dependent on changes in the number and sizes of beetle populations in a given area, as well as on breeding site availability and suitability. Copyright © Cambridge University Press 1998 Scholz D. International Institute of Tropical Agriculture, Plant Health Management Division, 08 BP 0932, Tri Postal, Cotonou, Republic of Benin, West Africa Borgemeister C. International Institute of Tropical Agriculture, Plant Health Management Division, 08 BP 0932, Tri Postal, Cotonou, Republic of Benin, West Africa Markham R. H. International Institute of Tropical Agriculture, Plant Health Management Division, 08 BP 0932, Tri Postal, Cotonou, Republic of Benin, West Africa Poehling H. M. Institut für Pflanzenkrankheiten und Pflanzenschutz, Universität Hannover, Herrenhäuser Str. 2, 30419 Hannover, Germany Bulletin of Entomological Research Cambridge University Press 88/5(1998-10), 545-552 0007-4853 88:5<545 1998 88 BER https://doi.org/10.1017/S0007485300026067 text/html Onlinezugriff via DOI 1 review-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0007485300026067 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Scholz D. International Institute of Tropical Agriculture, Plant Health Management Division, 08 BP 0932, Tri Postal, Cotonou, Republic of Benin, West Africa NATIONALLICENCE 700 1- Borgemeister C. International Institute of Tropical Agriculture, Plant Health Management Division, 08 BP 0932, Tri Postal, Cotonou, Republic of Benin, West Africa NATIONALLICENCE 700 1- Markham R. H. International Institute of Tropical Agriculture, Plant Health Management Division, 08 BP 0932, Tri Postal, Cotonou, Republic of Benin, West Africa NATIONALLICENCE 700 1- Poehling H. M. Institut für Pflanzenkrankheiten und Pflanzenschutz, Universität Hannover, Herrenhäuser Str. 2, 30419 Hannover, Germany NATIONALLICENCE 773 0- Bulletin of Entomological Research Cambridge University Press 88/5(1998-10), 545-552 0007-4853 88:5<545 1998 88 BER CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge