期刊
PEST MANAGEMENT SCIENCE
卷 78, 期 3, 页码 1008-1017出版社
JOHN WILEY & SONS LTD
DOI: 10.1002/ps.6712
关键词
Piperaceae; phenylpropanoid; botanical insecticide; food deterrent; fumigant
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico [CNPq] [422233/2018-8, 407192/2018-2, 303404/2019-1, 309701/2019-8]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) [001]
- Fundacao de Amparo a Ciencia e Tecnologia do Estado de Pernambuco (FACEPE) [APQ-0443-1.06/15, APQ-0414-2.08/17]
The study demonstrated that PcLEO and BMDB exhibited insecticidal activity against S. zeamais, with toxic effects by fumigation, contact, and ingestion, as well as strong food deterrence and inhibition of trypsin and alpha-amylase activities. These results suggest the potential use of PcLEO and BMDB in pest control.
BACKGROUND Sitophilus zeamais is one of the most economically impactful pests, attacking various grains and processed foods. Control of this insect has been achieved using synthetic insecticides, exacerbated and careless use of which has led to the development of resistant insect populations, toxicity to non-target organisms and environmental contamination. In this study, Piper corcovadensis leaf essential oil (PcLEO) and its major compound, 1-butyl-3,4-methylenedioxybenzene (BMDB), were investigated as alternative insecticidal agents against S. zeamais. RESULTS Characterization of PcLEO showed the presence of 40 compounds. The major components were the phenylpropanoid BMDB (35.77%) and the monoterpenes alpha-pinene (14.95%) and terpinolene (6.23%). PcLEO and BMDB were toxic by fumigation (half-maximal lethal concentration [LC50]: 9.46 and 0.85 mu l L-1 of air, respectively), by contact (half-maximal lethal dose [LD50]: 9.38 and 6.16 mu g g(-1) of insect, respectively) and ingestion (LC50: 16.04 and 14.30 mg g(-1), respectively). In the ingestion test, both PcLEO and BMDB promoted the loss of insect biomass and had a strong deterrent effect. In addition, both were able to inhibit trypsin and alpha-amylase activities. CONCLUSION PcLEO and BMDB exhibited insecticidal activity against S. zeamais, with a toxic effect by fumigation, contact and ingestion, in addition to food deterrence and inhibiting trypsin and alpha-amylase activities, suggesting their potential for use in the control of this pest.
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