| 1. | In the northern states fumigation is needed only after insect outbreaks occur .
在北部各州，只在虫害发生后才进行熏蒸。 |
| 2. | There has been a further shift toward the development of integrated systems of pest control .
研究方向进而转向发展虫害的综合防治体系。 |
| 3. | In many cases, plants infected with nematodes are more susceptible to other pests and disease .
在许多情况下，感染虫的植株更易感染其它虫害和病害。 |
| 4. | Nectarines exhibit different reactions to specific insect attacks and fungal infections than do peaches .
油桃对特定的虫害和病害感染的反应与桃相比有所不同。 |
| 5. | Development of alternative pest control methods will no doubt decrease the need for chemical pesticides in the future .
虫害防治方法的新发展，无疑将使未来的化学农药需要量大大减少。 |
| 6. | Influence of fire on the occurrence of forest pest
林火对森林虫害发生影响的研究 |
| 7. | Npma national pest control management association
Npma美国国家虫害管理协会 |
| 8. | In those days they had to fight the pests barehanded
那时候他们得赤手空拳和虫害作斗争。 |
| 9. | Effective measures to kill insect and black beetle
采取有效的消杀蚊蝇、蟑螂等虫害措施。 |
