Abstract
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.
Highlights
The whitefly Bemisia tabaci (Gennadius) biotype Q (Hemiptera: Aleyrodidae) is a serious pest of tomato plants worldwide
The combination of D-limonene and citral with olive oil in the ratio of 63:7:30 and 81:9:10 had a smaller SR50 values than D-limonene, but for economic reasons, the ratio of 63:7:30 was chosen for subsequent experiments
Previous research has indicated that ginger oil can protect tomato seedlings from whitefly settling and oviposition, and this repellency of ginger oil was attributed to its odor[33]
Summary
The whitefly Bemisia tabaci (Gennadius) biotype Q (Hemiptera: Aleyrodidae) is a serious pest of tomato plants worldwide. Chemical control is widely used for the management of B. tabaci, whitefly has developed resistance to a number of insecticides[20]. The excessive use of insecticides has resulted in the elimination of natural enemies of whitefly[16], leading to an ecological crisis in tomato production systems. This situation has led to the development of integrated pest management (IPM) strategies, in which biological control plays a central role[21]. Various petroleum oils and plant-derived oils have repellent activities against insect pests[22], demonstrating the potential for their use in IPM. Considering the reason of economic and repellent efficiency, some repellent volatile chemicals on above were chosen for this research
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
