| 1. | Petroleum oil or larvicide is applied to water bodies at work sites wherever necessary
在有需要时，会在工地内积水的地方施用蚊油或杀幼虫剂。 |
| 2. | A list of registered pesticides that can be used as mosquito larvicides is presented in table 1
表一列出一些可用作杀灭蚊子幼虫的已注册除害剂。 |
| 3. | Fehd will step up anti - mosquito work around the area where the patient stayed . larvicides have been applied to control mosquito breeding
食物环境生署已在病人露宿的地方加强灭蚊行动和喷洒除虫剂，预防蚊子滋生。 |
| 4. | " the fehd has been conducting anti - mosquito operations around piggeries on a regular basis . " larvicides have been applied to control mosquito breeding
袁铭志说：食物环境生署一直定期在猪场附近一带进行灭蚊行动。 |
| 5. | The fehd has been conducting anti - mosquito actions in the area and around nearby piggeries on a regular basis . larvicides have been applied to control mosquito breeding
食物环境生署一直定期在该区及附近猪场一带进行灭蚊行动，施放除害剂消灭蚊子。 |
| 6. | With its neurotoxic mode of action different from other larvicides , it can be used in rotation with other larvicides to prevent the development of resistance
双硫磷的灭杀作用模式是令蚊子神经中毒，可和其他不同的灭蚊幼虫剂轮流使用，防止蚊子产生抗药 |
| 7. | To that end , when it is necessary to resort to chemical control , the use of larvicides should always be the backbone of the programme with adulticides as a supplement only
因此，当必要使用除害剂控制蚊患时，应以灭蚊幼虫剂作为控制蚊患整体计划的骨干 |
| 8. | Since larvicides are directed at the most concentrated developmental stage of mosquitoes , they can provide very effective control and reduce the need for adulticides later
顾名思义，灭蚊幼虫剂是用来杀灭水中蚊子的幼虫(俗称孑孓) ，而灭成蚊剂则用来杀灭成蚊。 |
| 9. | It may be necessary to resort to adulticides when larvicide application cannot provide adequate and satisfactory control and the mosquito population reaches an annoying level and there is a threat of mosquito - borne diseases
若使用灭蚊幼虫剂不足以控制蚊患，而蚊子数量又达到非常滋扰的程度及 |
| 10. | When it is not possible to eliminate stagnant water that may become breeding grounds of mosquitoes , and there are no alternative methods of control , larvicides may be applied to the water bodies
当积水无法清除并且成为蚊子滋生的温床时，又没有其他有效控制蚊患的方法，可将灭蚊幼虫剂施放于水体。 |
