灌巢对红火蚁的防效评价及对蚂蚁群落的影响

利用触杀性杀虫剂灌巢防治红火蚁的试验表明,灌巢后4周,利用有效蚁丘调查法、诱集法和陷捕法评价的防治效果分瘪为100%、100%和61.54%,说明灌巢可在短期内迅速减少红火蚁的蚁丘数、降低活动工蚁数量,防治效果非常明显。试验结果还表明,在第一次灌巢13周后,以有效蚁丘调查法和诱集法获得的防效分别为100%、79.22%,说明在秋末冬初用药剂灌巢防治红火蚁的效果可维持至少3个月。试验中不同取样方法得出防效变化趋势与有效蚁丘的变化基本一致,诱集法比较适合灌巢等防治红火蚁的田间药效评价和发生监测,陷阱法仅适合蚂蚁生态学的研究。此外,还调查了灌巢后红火蚁入侵绿化地内常见蚂蚁种类及其组成。为我国红火蚁的化学防治效果的评价方法提供了科学依据。

Red imported fire ant control with firronil mound drenches and its impact inant community

The experiment of mound drench with 5% regent SC against red imported fire ant from autumn in 2005 to spring in 2006 in Nansha District,Guangzhou revealed control efficacy in the grassy field were 100%, 100%,and 61.54%,respectively 4 weeks after treatment using active mound,baiting,and pitfall trap compared with pretreatment.The effectiveness also were calculated as 100% and 79.22% in 13 weeks after treatment using mound counting and baiting.The mound drench measure reduced rapidly the amount of active mounds and foraging workers of fire ant in a month and control remained as long as 13 weeks after drench.Although three type of evaluation method such active mound,baiting and pitfall trapping were available,the hot dog baits was recommended to be used in efficacy evaluation and occurrence monitoring and pitfall trap was suitable to data collection of ant community.In addition,ant species on the ground in experiment plots before and after treatment were identified and analyzed.