Field Tests with the Aggregation Pheromone of the Lesser Grain Borer (Coleoptera: Bostrichidae)

Outdoor flight activity and immigration of Rhyzopertha dominica into seed wheat warehouses

“…This is an important consideration because insect response should be similar, or at least well understood, before making comparisons about population changes. This problem could potentially be alleviated with dispensers or formulations that provide more consistent, long-term pheromone release, since R. dominica pheromone components do not degrade with time (Cogburn et al, 1984). One way to mitigate the effects of the stronger first day would be to 'age' the lures for at least 24 h before deploying them in the field as suggested for polyethylene lures for P. truncatus (Hodges et al, 2004).…”

Flight Activity of the Lesser Grain Borer, <I>Rhyzopertha dominica</I> F. (Coleoptera: Bostrichidae), in Relation to Weather

“…Previous reports on seasonal ßight activity of R. dominica included those by Schwitzgebel and Walkden (1944), Cogburn et al (1984), Sinclair and Haddrell (1985), and Throne and Cline (1994). As with our Þndings, these early reports showed that relatively high R. dominica ßight activity occurred during the warmer part of the year (July through September).…”

“…Rhyzopertha dominica is a strong ßier (Winterbottom 1922), and extensive trapping studies have shown a characteristic seasonal activity pattern that seems to be determined by weather conditions (Cogburn et al 1984, Sinclair and Haddrell 1985, Throne and Cline 1994. R. dominica is considered an internal feeder, which means that early detection is challenging and that considerable damage can occur before the beetle infestation is noticed.…”

Sensitivity ofProstephanus truncatus(Coleoptera: Bostrichidae) Flight Activity to Environmental Variables in Benin, West Africa

“…Interpretation of pheromone trap catches of bostrichids is complicated because many factors are known to affect the effective range of pheromone traps, including trap type (Key et al 1994, Hodges et al 1998) wind speed and direction (Boeye et al 1994), trap height (Cogburn et al 1984, Key et al 1994, and weather conditions (Tigar et al 1993, Dowdy 1994). In addition, there is evidence that pheromone traps may be selective on at least two levels by mainly attracting certain parts of the total population.…”