Evaluation of Insecticides for Lethal Dose, Lethal Concentration, and Field Activity on Hunting Billbug in Warm-Season Turfgrass

Joseph P. Doskocil, Clyde E. Sorenson, Reed N. Royalty, Rick L. Brandenburg
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引用次数: 4

Abstract

The response of hunting billbug, Sphenophorus venatus vestitus Chittenden (Coleoptera: Curculionidae), to insecticides was evaluated in field and laboratory bioassays. Field bioassays evaluated treatment by timing and compound. Laboratory bioassays evaluated lethal dose and lethal concentration. A field evaluation of a bifenthrin and imidacloprid combination (Allectus) suggests that it is effective at reducing adult billbug populations in North Carolina when applied in September and May/September. LD95 and LC95 data collected in the laboratory showed significant differences between lethal doses of neonicotinoids and pyrethroids or combination products which contain pyrethroids. Pyrethroid-containing products required lower concentrations to achieve mortality than neonicotinoids alone.

杀虫剂对暖季草坪草捕Billbug的致死量、致死浓度及田间药效评价
采用田间和室内生物测定的方法,研究了猎耳虫(鞘翅目:瓢虫科)对杀虫剂的反应。现场生物测定通过时间和化合物评价治疗。实验室生物测定法评估致死剂量和致死浓度。对联苯菊酯和吡虫啉组合(诱蚊)的现场评价表明,在9月和5月/ 9月使用联苯菊酯和吡虫啉可有效减少北卡罗来纳州成年billbug的数量。实验室收集的LD95和LC95数据显示,新烟碱类和拟除虫菊酯或含有拟除虫菊酯的组合产品的致死剂量存在显著差异。含有拟除虫菊酯类杀虫剂的产品比单独使用新烟碱类杀虫剂的产品需要更低的浓度才能达到死亡率。
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