期刊
NEOTROPICAL ENTOMOLOGY
卷 42, 期 1, 页码 89-94出版社
ENTOMOLOGICAL SOC BRASIL
DOI: 10.1007/s13744-012-0087-z
关键词
Bottle brush; insecticide plants; fumigant; repellency; sustainable pest management
类别
资金
- Ramin Agriculture and Natural Resources University of Iran
The essential oil of Callistemon citrinus (Curtis) leaves was extracted by hydro distillation and tested on female and male adults of Callosobruchus macullatus (F.) for insecticidal and repellent effects. GC-MS analysis was used to identify and quantify the volatile composition of the essential oil. Results showed that 1,8-cineole (34.2%) and alpha-pinene (29.0%) were the major components of the oil. Callistemon citrinus oil was found to be toxic to adult insects when applied by fumigation. Responses varied according to the gender of the insect and exposure time. LC50 values were 12.88 and 84.4 mu L. L-1 for males and females, respectively. An increase in exposure time from 3 to 24 h caused an increase in mortality from 50% to 100% in males and from 15.5% to 85.2% in females, at the highest concentration (500 mu L. L-1). The essential oil also had a repellent effect against C. macullatus in a filter paper arena test. After 2 and 4 h, 86% and 94%, respectively, repellent effects were demonstrated at the highest concentration of 0.4 mu L .cm(-2). These observations suggest that C. citrinus essential oil may be usefully applied to control storage pests.
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