Du Wenxiao, Han Xiaoqing, Wang Yubo, Qin Yuchuan
Department of Entomology, China Agricultural University, Beijing 100193, China.
Tangshan Academy of Agricultural Sciences, Tangshan City 063001, China.
Sci Rep. 2016 Feb 24;6:22140. doi: 10.1038/srep22140.
With the goal of finding a new way to reduce population densities of Bemisia tabaci biotype Q in greenhouses, seven repellent volatile chemicals and their combinations were screened. The mixture of DLCO (D-limonene, citral and olive oil (63:7:30)) had a better cost performance(SC50 = 22.59 mg/ml)to repel whiteflies from settling than the other mixtures or single chemicals. In the greenhouse, in both the choice test and the no-choice tests, the number of adult whiteflies that settled on 1% DLCO-treated tomato plants was significantly lower than those settling on the control plants for the different exposure periods (P < 0.01). In the choice test, the egg amount on the treated tomato plants was significantly lower (P < 0.01) than that on the control plants, but there was no significant difference (P > 0.05) between the number of eggs on treated and control plants in the no-choice test. Compared with the controls, 1% DLCO did not cause significantly statistic mortality rates (P > 0.05) out of different living stages of B. tabaci. The tests for evaluating the repellent efficacy, showed that a slow-releasing bottle containing the mixture had a period of efficacy of 29 days, and the application of this mixture plus a yellow board used as a push-pull strategy in the greenhouse was also effective.
为了找到一种降低温室中烟粉虱Q型生物型种群密度的新方法，对七种驱避挥发性化学物质及其组合进行了筛选。DLCO混合物（D-柠檬烯、柠檬醛和橄榄油（63:7:30））在驱避粉虱落定方面比其他混合物或单一化学物质具有更好的性价比（SC50 = 22.59 mg/ml）。在温室中，在选择试验和非选择试验中，在不同暴露期内，落在用1% DLCO处理的番茄植株上的成年粉虱数量显著低于落在对照植株上的数量（P < 0.01）。在选择试验中，处理过的番茄植株上的卵量显著低于对照植株（P < 0.01），但在非选择试验中，处理过的和对照植株上的卵数没有显著差异（P > 0.05）。与对照相比，1% DLCO对烟粉虱不同生活阶段的死亡率没有显著统计学差异（P > 0.05）。评估驱避效果的试验表明，装有该混合物的缓释瓶有效期为29天，在温室中将该混合物与黄板结合使用作为推拉策略也有效。
