Brenner R J, Pierce R R
Medical and Veterinary Entomology Research Laboratory, USDA-ARS, Gainesville, Fla 32604.
J Econ Entomol. 1991 Dec;84(6):1735-45. doi: 10.1093/jee/84.6.1735.
Populations of smokybrown cockroaches, Periplaneta fuliginosa (Serville), and Eurycotis floridana (Walker) were studied to compare mobility and population size between fall 1985 and spring 1986 seasons at site A, and to assess the effect of a combination of traps and baits at site B in northcentral Florida. Adult smokybrown cockroaches were more mobile in the spring than in the fall; a similar trend for E. floridana adults was not significant. Overall population levels were reduced after winter by approximately 73%. No significant shift in spatial distributions of nymphs occurred, but adult distribution changed from a predominance in palms (fall) to hardwood trees with tree holes (spring), suggesting that this habitat offers better survival during winter. Removal of cockroaches by trapping at site B, followed by a single application of dry distiller's grain containing 0.5 chlorpyrifos, reduced expected population levels (based on site A data) by 90% measured at 6 mo after treatment. These data refute the hypothesis that an increase in numbers of cockroaches infesting homes in the fall is due to an increase in mobility. Instead, the results suggest that population size and proximity of principal habitats to the home are probably responsible for domestic infestations in the fall. Use of traps, baits, or both at these foci significantly reduce populations over an extended period.
对烟熏褐色蟑螂（Periplaneta fuliginosa (Serville)）和佛罗里达巨蠊（Eurycotis floridana (Walker)）种群进行了研究，以比较1985年秋季和1986年春季A地点蟑螂的活动能力和种群规模，并评估佛罗里达州中北部B地点诱捕器和诱饵组合的效果。成年烟熏褐色蟑螂春季的活动能力比秋季更强；佛罗里达巨蠊成虫的类似趋势并不显著。冬季过后，总体种群数量下降了约73%。若虫的空间分布没有显著变化，但成虫分布从以棕榈树为主（秋季）转变为有树洞的硬木树为主（春季），这表明这种栖息地在冬季能提供更好的生存条件。在B地点通过诱捕清除蟑螂，随后单次施用含0.5%毒死蜱的干酒糟，处理后6个月时测量发现，预期种群数量（基于A地点数据）减少了90%。这些数据驳斥了秋季侵扰家庭的蟑螂数量增加是由于活动能力增强这一假设。相反，结果表明种群规模以及主要栖息地与家庭的距离可能是秋季家庭受到侵扰的原因。在这些集中区域使用诱捕器、诱饵或两者结合，可在较长时期内显著减少蟑螂种群数量。
