Department of Entomology and Division of Biological Control, University of California, 94720, Berkeley, California.
J Chem Ecol. 1988 Feb;14(2):561-79. doi: 10.1007/BF01013907.
The host-selection behavior of three species of grasshopper feeding on creosote bush,Larrea tridentata, in southern California was investigated. The species wereBootettix argentatus, which is monophagous;Ligurotettix coquilletti, oligophagous; andCibolacris parviceps, polyphagous. The monophagous species is stimulated to bite by nordihydroguaiaretic acid (NDGA), a compound that is characteristic of the host plant and that may comprise up to 10% of the dry weight of the leaf. Host specificity ofB. argentatus is enhanced by deterrent responses to compounds present in the surface waxes of all non-host-plant species. Both the oligophagous and polyphagous species are deterred by NDGA at naturally occurring concentrations. Their association withLarrea is probably based on tolerance of the plant chemicals rather than on dependence on specific chemicals. Factors other than the chemistry of the plant probably also contribute to the specificity ofB. argentatus andL. coquilletti.
在加利福尼亚南部，对三种以龙舌兰科三齿滨藜（Larrea tridentata）为食的蝗虫的取食寄主选择行为进行了研究。这些物种是专食性的银斑角翅蝗（Bootettix argentatus）、寡食性的斑翅蝗（Ligurotettix coquilletti）和多食性的短角异爪蝗（Cibolacris parviceps）。专食性物种受到 Nordihydroguaiaretic acid (NDGA) 的刺激而咬食，NDGA 是一种特征化合物，存在于寄主植物中，其含量可达叶片干重的 10%。B. argentatus 的寄主专一性通过对所有非寄主植物物种表面蜡质中存在的化合物的驱避反应得到增强。寡食性和多食性物种都会被自然存在浓度的 NDGA 所驱避。它们与 Larrea 的联系可能基于对植物化学物质的耐受性，而不是对特定化学物质的依赖。除了植物化学物质外，其他因素也可能导致 B. argentatus 和 L. coquilletti 的特异性。
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