There's unpredictable weather, changes in soil quality, and the ever-present possibility that pests and diseases may pay a visit.

天气不可预测，土壤质量发生变化，害虫和疾病随时都可能出现。

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Similar considerations apply to dealing with pests and diseases.

类似的考虑也适用于病虫害和疾病。

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II.2 EMERGENCY PREVENTION OF TRANSBOUNDARY ANIMAL AND PLANT PESTS AND diseases.

紧急预防跨界动植物病虫害。

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Most of these new varieties are designed to be resistant to pests and diseases, or to be resistant to herbicides, so that farmers can more effectively control weeds while adopting more environment-friendly no-till farming practices and more benign herbicides.

FORBES: Move up http://i.forbesimg.com t Move down

Mars, along with Mondelez, has also joined with the London-based International Cocoa Organization to tackle the West African cocoa pests and diseases that cause more than 40% of global crop losses and are threatening future production in the key growing region.

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The results will be used to inform future decisions relating to bee health and treatment of diseases, pests and emerging threats.

BBC: First Scottish bee health survey gets under way