微胶囊梨酯（2E，4Z）-乙基-2,4-癸二烯酸酯的特性，作为一种引诱剂喷雾佐剂防治幼龄苹果蠹蛾幼虫。

Characterization of microencapsulated pear ester, (2E,4Z)-ethyl-2,4-decadienoate, a kairomonal spray adjuvant against neonate codling moth larvae.

机构信息

Plant Mycotoxin Research Unit, Western Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 800 Buchanan Street, Albany, California 94710, USA.

出版信息

J Agric Food Chem. 2010 Jul 14;58(13):7838-45. doi: 10.1021/jf101167p.

DOI:10.1021/jf101167p

PMID:20527813

Abstract

Codling moth (CM), Cydia pomonella (Lepidoptera: Tortricidae), is the key pest of apples, pears, and walnuts worldwide. The pear-derived kairomone, ethyl (2E,4Z)-2,4-decadienoate, the pear ester (PE), evokes attraction and arrestment of CM larvae. Microencapsulated PE formulation (PE-MEC) enhances the control efficacy of insecticides when used as a spray adjuvant. Characterization of the microencapsulated kairomone, including microcapsule size, concentrations, emission rates, and larval response, was performed. Microcapsule diameter ranged from 2 to 14 mum, with 68% of capsules being 2-3 mum, and the concentration of microcapsules averaged 25.9 x 10(4) capsules per mL of field spray solution. Headspace collections showed emission of PE was related to PE-MEC concentration and was best described as first-order power decay. Neonate larvae responded to PE-MEC applications aged through 14 days. These results demonstrated that application of PE-MEC concurrent with insecticides may increase neonate foliar wandering, thereby disrupting host location and enhancing mortality by prolonging its exposure to insecticide.

摘要

苹小卷叶蛾（CM），苹果卷蛾（鳞翅目：卷蛾科），是全球苹果、梨和核桃的主要害虫。来源于梨的信息素，（2E，4Z）-2,4-癸二烯酸乙酯，即梨酯（PE），能吸引并阻止 CM 幼虫。微胶囊化 PE 制剂（PE-MEC）作为喷雾助剂使用时，可增强杀虫剂的控制效果。对微囊化信息素进行了特征描述，包括微胶囊的大小、浓度、释放率和幼虫的反应。微胶囊的直径范围为 2 至 14 微米，其中 68%的胶囊为 2-3 微米，微胶囊的浓度平均为每毫升田间喷雾溶液中含有 25.9 x 10(4)个微胶囊。顶空收集显示 PE 的释放与 PE-MEC 浓度有关，最适合描述为一阶幂衰减。经 14 天龄期的幼虫对 PE-MEC 处理有反应。这些结果表明，与杀虫剂同时使用 PE-MEC 可能会增加新孵化幼虫的叶面游动，从而破坏其对寄主的定位，并通过延长其与杀虫剂的接触来提高死亡率。