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Issue:ISSN 2095-1353
           CN 11-6020/Q
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Your Position :Home->Past Journals Catalog->2017年54 No.3

Aloe vera L. extracts repel oviposition by the oriental fruit fly (Bactrocera dorsalis)
Author of the article:LI Zhi-Wei** LIU Jia-Li XIONG Ting ZENG Xin-Nian***
Author's Workplace:College of Agricultural, South China Agricultural University; Guangdong Engineering Research Center for Insect Behavior Regulation, Guangzhou 510642, China
Key Words:Bactrocera dorsalis, Aloe extract, repellent effect, persistent period
Abstract:

 [Objectives]  To investigate the extent to which oriental fruit fly oviposition is repelled by Aloe vera L. extracts, and identify the best eluatants for these extracts. [Methods]  A. vera volatiles were extracted with methanol, acetone, ethylacetate, dichloromethane and petroleum, and the degree to which these five crude extracts repelled oviposition was compared. The effect of different dosages of the five extracts on oviposition was studied in non-choice and choice tests. The persistence of the repellent effect of each extract was also measured. [Results]  The results show that all five crude extracts deterred oviposition but the acetone extract was the most effective. The effect of acetone extract on oviposition was dose dependent, with deterrence increasing with concentration. Oviposition repellence rates were 68.81% (choice test) and 89.43 % (non-choice test) at a concentration of 10 mg/mL. The repellent activity of the acetone extract sprayed on guava fruit decreased gradually over time. There was no significant difference in the number of oviposition sites between treatment and control groups on the 5th day of the experiment, nor was there any significant difference in the fecundity of these groups on the 6th day. [Conclusion]  Aloe acetone extracts strongly repelled oviposition by the oriental fruit fly, and could be developed as a natural oviposition repellent. Though the effect of this extract was not very persistent, improved formulation may improve this.

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