韧皮部及其邻近组织是大多数蚜虫的主要取食部位。
Phloem elements and adjacent tissues are the principal feeding sites for most aphids.
从取食方式和取食部位来看，以为害茶树嫩梢和叶片的食叶性害虫和吸汁性害虫为主，共达240种，占全部种类的79.47%。
If it is classified with the damaged position on tea plant, the species of pests damaging the shoots and leaves of tea plant are the most, amounting to 240 species, as 79.47% of the total.
一旦口针进入韧皮部持续吸食阶段，蚜虫在三个部位的取食行为没有太大的差异。
And no significant differences were found in feeding behaviors among aphids on three plant parts once sustained ingestion started in the phloem.
因此，本实验的结果证明，白芥子苷是甘蓝蚜寄主部位选择的关键信号化学物质或取食促进剂。
Our results indicate that sinalbin is an important indicative chemical or feeding stimulant in host plant part preference by the cabbage aphid.
非寄主植物内部对大豆蚜的侵害存在抗性，影响取食的因素和其所在部位因非寄主植物种类的不同而不同。
The non-host plants possess resistance against A. glycines. And with the difference of the non host plants, the factors affecting ingestion and their position on the plant were different.
幼虫在不同寄主植物上取食危害的症状不同，其化蛹部位也不同。
The injury symptom of leaves caused by larvae varied with host plants, and the pupation site was different depending on the host plants.
这也许是褐飞虱喜欢聚集在叶鞘部位取食的化学因素之一。
It might be one of the reasons why BPH has a preference of feeding on leaf sheath aggregately from chemical point of view.
这也许是褐飞虱喜欢聚集在叶鞘部位取食的化学因素之一。
It might be one of the reasons why BPH has a preference of feeding on leaf sheath aggregately from chemical point of view.
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