| 1. | A field may be smothered with aphids .
一块田的植株可以被蚜虫盖满。 |
| 2. | Wind has little influence on sedentary aphids .
风对不动的蚜虫很少有影响。 |
| 3. | The immobilized aphids quickly died .
被粘住的蚜虫很快死亡。 |
| 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。 |
| 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。 |
| 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。 |
| 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。 |
| 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。 |
| 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。 |
| 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。 |
