荜澄茄和刺毛胡椒精油对小菜蛾的致死和亚致死效应

Lethal and sublethal effects of essential oils fromPiper capitarianumYunck andPiper krukoffiiYunck onPlutella xylostellaL.

机构信息

Universidade Federal Rural de Pernambuco, Laboratório de Investigação Química de Inseticidas Naturais, Departamento de Agronomia, Rua Dom Manoel de Medeiros, s/n, 52171-030 Recife, PE, Brazil.

Universidade Federal Rural de Pernambuco, Laboratório de Produtos Naturais Bioativos, Departamento de Química, Rua Dom Manoel de Medeiros, s/n, 52171-030 Recife, PE, Brazil.

出版信息

An Acad Bras Cienc. 2022 Aug 8;94(2):e20200072. doi: 10.1590/0001-3765202220200072. eCollection 2022.

DOI:10.1590/0001-3765202220200072

PMID:35946642

Abstract

Plutella xylostella (L.) is responsible for considerable vegetable crop losses in the metropolitan region of Manaus, Brazil. In recent decades, essential oils have been investigated as an alternative to synthetic insecticides. The genusPiperis widely distributed in Amazonia and essential oils from these plants have insecticidal properties. This study describes the chemical composition of the essential oils fromPiper capiterianumandPiper krukoffiias well as the lethal and sublethal effects onP. xylostella. The phytotoxicity of the oils on the host plant was also evaluated. Globulol was the major constituent of theP. krukoffiioil ando-cymene was the major constituent of theP. capitarianumoil. The oil fromP. capiterianumexhibited greater toxicity to larvae and eggs. This oil also presented greater repellant action, feeding deterrence and mild phytotoxicity to the host plant (Brassicae oleraceae). The findings suggest that this oil can be used in the preparation of a formulated insecticide for the management ofP. xylostellain different development phases. However, further studies are needed to evaluate the effect of this oil on crops under field conditions as well as non-target organisms and determine the cost-benefit ratio of a product formulated withP. capitarianumoil.

摘要

小菜蛾（L.）是造成巴西马瑙斯大都市区蔬菜作物大量损失的罪魁祸首。近几十年来，人们一直在研究精油作为合成杀虫剂的替代品。胡椒属植物广泛分布于亚马逊地区，这些植物的精油具有杀虫特性。本研究描述了Piper capiterianum和Piper krukoffii精油的化学成分，以及对小菜蛾的致死和亚致死效应。还评估了这些油对宿主植物的植物毒性。大根香叶烯醇是P. krukoffiioil 的主要成分，而 o- 月桂烯是 P. capitarianumoil 的主要成分。P. capiterianum 油对幼虫和卵的毒性更大。这种油还具有更强的驱避作用、摄食抑制作用和对宿主植物（芸薹属蔬菜）的轻度植物毒性。研究结果表明，这种油可用于制备一种制剂杀虫剂，以管理不同发育阶段的小菜蛾。然而，还需要进一步的研究来评估该油在田间条件下对作物、非目标生物的影响，并确定用 P. capiterianumoil 配制的产品的成本效益比。