caa a22 4500 388035501 CHVBK 20180307125003.0 cr unu---uuuuu 161130e199808 xx s 000 0 eng 10.1017/S0007485300042188 doi S0007485300042188 pii (NATIONALLICENCE)cambridge-10.1017/S0007485300042188 Seasonally contrasting activity of African black beetle, Heteronychus arator (Coleoptera: Scarabaeidae): implications for populations, pest status and management [Elektronische Daten] Flight and surface activity of the African black beetle, Heteronychus arator (Fabricius), detected by pitfall, light and window traps, was seasonally reversed. High surface activity relative to flight occurred in spring when beetles were mature, while relatively higher levels of flight occurred in autumn when they were immature. Pitfall trap captures were male-dominated in spring and female-dominated in autumn, and were a poor estimator of adult density. Light trap captures were consistently female-dominated. Although autumn flight was dispersive and inferred to have some role in population regulation, it was largely localized within the usual pasture habitat of the species. Some beetles flew into irrigated potato crops in autumn, but not specifically, as beetle abundance was consistently less than in surrounding dry pasture. High surface activity indicates spring is a strategic time for surface-applied control measures to prevent increase of H. arator in the next generation, a less disruptive alternative to conventional soil-incorporated insecticide directed at the new generation's larvae in summer. Such an approach would be best aimed early in the upsurge of activity, as most of the season's cohort of eggs was laid by the time surface activity peaked in mid-spring. Copyright © Cambridge University Press 1998 Matthiesse J.N. CSIRO Entomology, Private Bag, PO Wembley, WA 6014, Australia Learmonth S.E. Horticultural Research Centre, Agriculture Western Australia, Manjimup, WA 6258, Australia Bulletin of Entomological Research Cambridge University Press 88/4(1998-08), 443-450 0007-4853 88:4<443 1998 88 BER https://doi.org/10.1017/S0007485300042188 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0007485300042188 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Matthiesse J.N. CSIRO Entomology, Private Bag, PO Wembley, WA 6014, Australia NATIONALLICENCE 700 1- Learmonth S.E. Horticultural Research Centre, Agriculture Western Australia, Manjimup, WA 6258, Australia NATIONALLICENCE 773 0- Bulletin of Entomological Research Cambridge University Press 88/4(1998-08), 443-450 0007-4853 88:4<443 1998 88 BER CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge