Crocidolomia pavonana larval foraging: behavior and feeding site preferences on cabbage, Brassica oleracea
Crocidolomia pavonana larval foraging: behavior and feeding site preferences on cabbage, Brassica oleracea
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Crocidolomia pavonana 幼虫觅食：卷心菜、甘蓝的行为和进食地点偏好
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
M. Furlong
中科院分区：
文献类型：
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作者：
H. Takeuchi;M. Zalucki;M. Furlong
研究了甘蓝大斑螟Crociaciapavonana（Fabricius）幼虫对甘蓝的取食部位选择性。变种卡皮塔Warrior（菊科），并确定诱导植物对植食性的反应是否影响幼虫的行为。在第一个实验中，记录了植株内损害和幼虫分布，以解释植物上损害和幼虫取食行为的传播模式;幼虫最初在叶基部取食，并逐渐移向芽，避免叶尖。在第二个实验中，幼虫的表现（第一龄的持续时间，存活到第二龄，和第二龄的重量）进行了评估，当幼虫喂养的芽，基部，和最年轻的完全展开的叶在植物上的尖端。当它们以芽叶组织为食时，Crociodiapavonana幼虫表现最好，当它们以叶基部的叶组织为食时，表现最差。在第三个实验中，使用一龄生物测定法在三个植物部分中的每一个上测试诱导抗性的表达。当幼虫在测定前植物受损时以芽或基部组织为食时，未检测到对幼虫生长和发育的负面影响。然而，当叶的基部在测定之前被损坏或如果芽组织与测定同时被损坏时，在以叶尖组织为食的幼虫中检测到负面影响。研究结果表明，资源异质性的C。卷心菜植物内的pavonana是由一个位置的食物的初始质量和随后的诱导变化作为幼虫喂养的结果决定的;两者都有助于在这些群居幼虫中观察到的喂养模式。
Experiments were conducted to determine feeding site preferences of Crocidolomia pavonana (Fabricius) (Lepidoptera: Crambidae) larvae within cabbage plants, Brassica oleracea L. var. capitata cv. Warrior (Brassicaceae), and to determine whether induced plant responses to herbivory affect the behavior of larvae. In the first experiment, intra‐plant damage and larval distribution were recorded to account for the spreading pattern of damage and larval feeding behavior on a plant; larvae initially fed on the base of leaves and moved progressively to the bud, leaf tips were avoided. In the second experiment, larval performance (the duration of the first instar, survival to the second instar, and weight of second instars) was assessed when larvae fed on the bud, the base, and the tip of the youngest fully expanded leaf on a plant. Crocidolomia pavonana larvae performed best when they fed on bud leaf tissue and most poorly when they fed on leaf tissue at the base of leaves. In the third experiment, expression of induced resistance was tested on each of the three plant parts using a first‐instar bioassay. Negative impacts on larval growth and development were not detected when larvae fed on the bud or base tissue when plants were damaged prior to the assay. However, negative effects were detected in larvae feeding on tip leaf tissue when the base of the leaf was damaged prior to the assay or if the bud tissue was damaged simultaneously with the assay. The findings indicate that resource heterogeneity for C. pavonana within‐cabbage plants is determined by both the initial quality of food at a location and by subsequent induced changes as a result of larval feeding; both contribute to the feeding pattern observed in these gregarious larvae.