而另外的情况下，所需的特征，如能够抵抗某些病虫害的特征，不存在于植物基因组中。
Other times, the desired trait, such as the ability to resist certain pests, can be absent in plant genomes.
他们还提供病虫害防治、餐饮、甚至儿童护理。
They also provide pest control, catering and even child care.
作为综合病虫害治理计划的一部分时，使用苏云金芽孢杆菌尤其有效。
The use of Bt has been especially effective when employed as part of an integrated pest management programme.
类似的考虑也适用于病虫害和疾病。
Similar considerations apply to dealing with pests and diseases.
一些作物本身就具备防治病虫害、保持土壤肥力的功效，人类辅以轮种；即便需要添加一些肥料，大多用的是人畜粪便。
Some plants would control pests and soil quality naturally, and humans helped by rotating their crops; if extra fertilizer was needed, manure usually filled in.
在全球范围内，有关病虫害发生率及其对森林和森林产品造成影响的可量化数据有限。
Globally there is limited quantifiable data about pest incidence and their effects on forests and forest products.
专家说卷心菜不需要充足的阳光，如果按时浇水，防止病虫害，它就能很容易成长。
Experts say cabbage does not need full sun and grows easily if you water it regularly and protect against insects and disease.
草原变得只生长一种作物。病虫害容易扩散，将增加使用有潜在毒性杀虫剂的需要。
Where only one crop is grown, pests and disease can spread easily, creating the need for potentially toxic pesticides.
第二部分则包含了相关品种的重要病虫害检疫问题。
The second part covers the important pests and diseases of quarantine concern for the species in question.
这些手段包括：那些随着进口的激增或衰退而突然出现或消失的“保护措施”；各种表面上是为了阻止病虫害进入的令人困惑的卫生和“防疫”标准。
These include “safeguards” which pop up and down as imports surge and recede, and a bewildering array of sanitary and “phytosanitary” standards aimed ostensibly at keeping out pests and disease.
这些手段包括：那些随着进口的激增或衰退而突然出现或消失的“保护措施”；各种表面上是为了阻止病虫害进入的令人困惑的卫生和“防疫”标准。
These include "safeguards" which pop up and down as imports surge and recede, and a bewildering array of sanitary and "phytosanitary" standards aimed ostensibly at keeping out pests and disease.
该系统甚至还被用于预测疟疾等病虫害的爆发。
It even allows it to forecast outbreaks of insect-borne diseases such as malaria.
然而许多地区的产量在下降，因为杀虫剂成本高昂以及对环境的不利影响，病虫害问题无法应对。
However production is in decline in many regions as a result of pest and disease problems that cannot be managed due to the high cost of pesticides and their negative environmental effects.
一些作物已经进行基因改造而包含蓝四氮唑，也就是控制某些病虫害的一种病菌。
Some crops have been genetically engineered to contain Bt, a bacterium that controls certain insect pests.
通常基因改良作物是针对某种特殊的病虫害或者农药而培育的，但是某些有机农业拥趸却说基因改良作物会产生不必要的农药依赖性。
GMOs are often bred to be tolerant of specific pests or pesticides, but organic advocates say this creates an unnecessary dependence on pesticides.
然而，采取混种方式的农场里，不仅可以让作物们协同作战防护病虫害，在某种作物遭虫害减产时可以转而倚赖其他存活的作物取得收成。
Farms that use polyculture, however, not only enlist crops to protect each other from pests, but can also still rely on the surviving crops if one is killed by disease.
他们平整了山坡以防水土流失，还接受了怎样最有效地使用化肥和进行病虫害管理的技术培训。
The hillside was terraced to reduce erosion and farmers were trained in using fertilizer and pest management to the best effect.
他们到达的头几年，条件是非常艰苦的，寒冷的气候和病虫害毁坏了他们的庄稼。
The first few years were difficult. Cold weather and insects destroyed their crops.
强化抗灾政策支持。推进病虫害专业化统防统治。
Give more policy support to disaster fighting and promote the professional pest control system for large-scale pest prevention.
你种的越多，麻烦也越多，会有更多的病虫害，所以我们决定还是维持。
"You have more production, but you have lots of problems," Tavares explains. "you have more disease, more insects, so we decide to preserve."
草原变得只生长一种作物。 病虫害容易扩散，将增加使用有潜在毒性杀虫剂的需要。
pests and disease can spread easily, creating the need for potentially toxic pesticides.
所有项目不仅提供紧急援助，还帮助各国制定病虫害治理战略，以防止中长期内进一步爆发森林病虫害。
All projects offer more than emergency assistance, helping countries also to develop pest management strategies to prevent further outbreaks in the medium and long term.
所有项目不仅提供紧急援助，还帮助各国制定病虫害治理战略，以防止中长期内进一步爆发森林病虫害。
All projects offer more than emergency assistance, helping countries also to develop pest management strategies to prevent further outbreaks in the medium and long term.
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