四种植物精油对德国小蠊的驱避效果

室内测定4种蚊虫驱避效果较好的植物精油(香叶醇、芳樟醇、柠檬醛和茴香醛)对德国小蠊雄性成虫的驱避性,并与传统上常用的驱避剂DEET作对比研究,以期从中筛选出对德国小蠊驱避效果较好的驱避剂。每种植物精油设置4个剂量,即1,10,100和1000μg/cm2。结果表明,每种植物精油的驱避性均随剂量的增加而升高,4种精油的驱避性均高于DEET,驱避性最好的是芳樟醇;当剂量为100和1000μg/cm2时,每种植物精油的驱避性与对照组相比均有显著差异(P<0·05);除芳樟醇外,其余植物精油在剂量为1000μg/cm2时的驱避性与100μg/cm2的驱避性相比差异显著(P<0·05)。提示芳樟醇可能是一种很有发展前景的德国小蠊驱避剂。

Repellency of four plant essential oils to German cockroach, Blattella germanica

In order to screen the most effective repellent to German cockroach, Blattella germanica (L.), four different plante essential oils (geraniol, linalool,citral and anisaldehyde), which had been proved to be effective in repelling mosquitoes, were tested for their effectiveness for repelling adult male cockroaches. N,N-diethyl-3-methylbenzamide (DEET), a traditional repellent, was set as the standard for the repelling effectiveness comparison. Each kind of essential oil was tested at four different doses of 1, 10, 100 and .1 000 μg/cm2 respectively. The finding of the experiment was as following: the effectiveness of the four repellents increased with their dosage increment. All types of the plant essential oils showed to be more effective than DEET in repelling the German bugs. Among those chemical, linalool showed the highest repelling efficiency. When the repellent agent was 100 and .1 000 μg/cm2 dose, there was a significant difference in the repelling effectiveness of four types of oils (P<0.05). The study suggests that linalool could be developed as a promising German cockroach repellent.