Raupp Michael J, Sadof Clifford S
Department of Entomology, University of Maryland, 20742, College Park, MD, USA.
Oecologia. 1989 Aug;80(2):154-157. doi: 10.1007/BF00380144.
Adults of the leaf beetle Plagiodera versicolora Laich, avoided previously injured shoots of Salix alba 'Tristis' in favor of nearby uninjured ones. The response was rapid and persisted for five days of study. During brief periods of observation, the vast majority of beetles engaged in behaviors other than locomotion such as feeding and resting. Furthermore, the proportions of beetles walking were similar on injured and uninjured shoots. It appears that under these experimental conditions previous injury did not greatly increase searching behavior of the beetles. Leaves on previously injured shoots received less subsequent herbivory than uninjured ones. Findings of these experiments are consistent with patterns of herbivory observed in the field and known reproductive responses of beetles to diets of injured leaves. These results provide new information toward understanding relatively low levels of herbivory on individual willow leaves associated with the feeding of P. versicolora.
杂色叶甲成虫会避开之前受过伤的白柳‘Tristis’嫩枝，转而选择附近未受伤的嫩枝。这种反应迅速，且在为期五天的研究中一直存在。在短暂的观察期内，绝大多数甲虫都在进行进食和休息等非移动行为。此外，在受伤和未受伤的嫩枝上行走的甲虫比例相似。看来在这些实验条件下，先前的损伤并没有大幅增加甲虫的搜索行为。先前受伤嫩枝上的叶子随后受到的食草动物侵害比未受伤的嫩枝少。这些实验结果与在野外观察到的食草模式以及甲虫对受伤叶片饮食的已知繁殖反应一致。这些结果为理解与杂色叶甲取食相关的单个柳叶上相对较低水平的食草现象提供了新信息。
