Toxic and repellent effects of four plant essential oils on Bactrocera cucurbitae(Copullett)
Bactrocera cucurbitae(Copullett)is an important invasive insect pest of melon vegetables in China.In order to screen out plant essential oils with toxic and repellent effects on B.cucurbitae,the toxicity and oviposition repellent effects of four plant essential oils against B.cucurbitae were tested in the laboratory and verified in the field.The results showed that the toxicity of the four plant essential oils against B.cucurbitae adults increased with increasing concentrations of essential oils,and the toxicity of Cinnamomum cassia essential oil was significantly higher than that of the other essential oils.The corrected mortality rates of B.cucurbitae were 75.9％and 100％24 h after treated with 7 mg/mL and 10 mg/mL of C.cassia essential oil,respectively.Female adults had significantly higher olfactory response rates(93.3％)to Ilex chinensis essential oil compared to Perilla frutescens and Litsea cubeba essential oils.Repellent effects of different plant essential oils on egg-laying varied,and I.chinensis essential oil had the best repellent effect(69.04％)at the concentration of 10 mg/mL.The results of field experiments showed that different plant essential oils had control effects on B.cucurbitae to some extents,but the tests did not meet expectations,which may be due to the complex field environment,physical and chemical properties of plant essential oils and other factors.
万方数据
维普
