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.
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。
This paper described 16 new species of insect pests on garden plants in detail, including their morphology characteristics, damage characteristics and control measures.
本文记述了新近发生的16种重要园林害虫种类，包括其形态特征、为害特点及防治建议。
The known diseases and insect pests of Cycadaceae in China and their control were summarized, and 4 species of disease and 45 species of insect pest damaging Cycadaceae plants in China were recorded.
对中国苏铁科植物已知病虫害及其防治研究进行综述，整理出已知病害4种，虫害45种。
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