Absence of food aversion learning in the polyphagous noctuid, Spodoptera litura (F.) following intoxication by deleterious chemicals
Absence of food aversion learning in the polyphagous noctuid, Spodoptera litura (F.) following intoxication by deleterious chemicals
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DOI：
10.1007/s10905-005-9350-z
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发表时间：
2005-01-01
影响因子：
1
通讯作者：
Mukherjee, SN
中科院分区：
文献类型：
--
作者：
Ghumare, SS;Mukherjee, SN
本研究的目的是确定是否存在的有害化学物质在一个首选的寄主植物可以改变一个多食性昆虫的取食偏好。斜纹夜蛾Spodoptera litura（F.）（鳞翅目：夜蛾科）蓖麻、蓖麻（Ricinus communis（L.）（科：大戟科）与甘蓝、甘蓝（Brassica oleracea（L.）（家庭：通过两个单独的双向选择测试（未处理和用本研究中使用的测试化学品处理），每次用未处理的三龄幼虫定量测定（在没有处理的情况下和在用本研究中使用的测试化学品处理的情况下）。随后，连续饲喂（48 h）用试验化学品处理的优选宿主，并使用未处理的三龄幼虫进行调理。每种处理由9种化合物中的一种组成，包括7种天然存在的化感物质（即（-）-α-蒎烯、（-）-β-蒎烯、β-月桂烯、D-柠檬烯、桉树脑、芸香苷和阿芝油）和2种合成杀虫剂（即溴氰菊酯和马拉硫磷）。在此之后，用不含任何测试化学品的同一批幼虫重复双向选择测试。尽管暴露在有害的化学物质中，但幼虫继续保持对蓖麻的偏好。在测试化学品中，D-柠檬烯和溴氰菊酯导致生长显著减少。蓖麻的偏好没有克服暴露于新的有害化学物质，这表明厌恶，虽然有经验的是没有学到的。
The objective of this study was to determine whether the presence of a deleterious chemical in a preferred host plant could alter the feeding preference of a polyphagous insect. The preference of the Asian armyworm, Spodoptera litura (F.) (Lepidoptera: Noctuidae) for castor, Ricinus communis (L.) (family: Euphorbiaceae) relative to cabbage, Brassica oleracea (L.) (family: Brassicaceae) was quantified by two separate two-way choice tests (without treatment and with treatment of the test chemicals used in the present study) with naive third instar larvae each time. This was followed, by continuous feeding (48 h) on the preferred host treated with the test chemicals and using naive third instar larvae for conditioning. Each treatment consisted of one of nine compounds, including seven naturally occurring allelochemicals (viz. (-)-alpha-pinene, (-)-beta-pinene, beta-myrcene, D-limonene, cineole, rutin, and ajwain oil) and two synthetic insecticides (viz. alphamethrin and malathion). Following this, a two-way choice test was repeated with the same batch of larvae without any test chemical. Larvae continued to maintain preference for castor despite exposure to the deleterious chemicals. Among the test chemicals, D-limonene and alphamethrin caused significant reduction in growth. Preference for castor was not overcome by exposure to novel deleterious chemicals, suggesting that aversion, though experienced is not learned.