| 1. | A field may be smothered with aphids .
一块田的植株可以被蚜虫盖满。
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| 2. | Wind has little influence on sedentary aphids .
风对不动的蚜虫很少有影响。
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| 3. | The immobilized aphids quickly died .
被粘住的蚜虫很快死亡。
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| 4. | Heavy rain or hail may dislodge many aphids from the plants .
大雨和冰雹可从植株上击落很多蚜虫。
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| 5. | The combined activities of aphidenemies overtake reproduction by the aphids .
蚜虫天敌的联合活动超过蚜虫的繁殖力。
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| 6. | In general an aphid cannot or hardly identify its host at a distance .
在一定距离以外，蚜虫通常不能或难以识别其寄主植物。
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| 7. | Phloem elements and adjacent tissues are the principal feeding sites for most aphids .
韧皮部及其邻近组织是大多数蚜虫的主要取食部位。
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| 8. | Aphid count on plants in fields do not correlate with virus spread in the same fields .
田间植株蚜数与同块田内病毒的扩散程度间无相关性。
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| 9. | However, reproduction rates of some insects such as aphids are influenced by nutrition .
然而，一些昆虫的繁殖率，如蚜虫等是受营养影响的。
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| 10. | There is adequate variability in plants to breed for resistance to certain aphid vectors .
植物有充分的变异性可用于培育对一些蚜虫介体的抗性。
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