Barker A M, Wratten S D, Edwards P J
Department of Biology, University of Southampton, Bassett Green Road, SO9 3TU, Southampton, UK.
Oecologia. 1995 Feb;101(2):251-257. doi: 10.1007/BF00317291.
Several studies have shown changes in the patterns of damage from feeding insects associated with changes in palatability and overall consumption as a result of wound-induced chemical changes in plants. This paper describes how the pattern of feeding damage made by the larvae of Spodoptera littoralis Boisd. (Lepidoptera: Noctuidae) on tomato is affected by changes in palatability of the leaves. Two sorts of responses to leaves from plants that had received prior damage were observed. Larvae offered a choice of leaves tended to take fewer meals on leaves from previously-wounded plants than on control leaves, frequently rejecting the former after sampling them. On wounded plants this rejection behaviour was associated with a shift in feeding site towards the base of the plant. However, starved larvae offered only a single excised leaf readily ate leaves from wounded plants but took shorter meals on these leaves than on controls. Although it was not directly tested it is possible that this difference in response reflected changes in food selectivity with a differing level of satiation. The results are considered in relation to the adaptive significance of the plant of changes in within-plant distributions of herbivore damage.
多项研究表明，由于植物伤口诱导的化学变化，取食昆虫造成的损害模式会随着适口性和总体消耗量的变化而改变。本文描述了斜纹夜蛾幼虫对番茄叶片造成的取食损害模式是如何受到叶片适口性变化影响的。观察到了对先前受过损伤的植物叶片的两种反应。当幼虫可以选择叶片时，相较于对照叶片，它们在先前受过伤的植物叶片上进食的次数往往较少，在取样后常常会拒绝前者。在受伤的植物上，这种拒绝行为与取食部位向植株基部转移有关。然而，只提供一片离体叶片的饥饿幼虫很容易取食受伤植物的叶片，但在这些叶片上进食的时间比在对照叶片上短。尽管没有直接进行测试，但这种反应差异可能反映了不同饱腹感水平下食物选择性的变化。本文结合植物在植物体内草食动物损害分布变化的适应性意义对这些结果进行了探讨。
