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在传统的农业生态系统中,植物的种间和种内混合种植,可使植物程度不同地免受病、虫的危害。从十八世纪开始,农业生产上仅依靠少数几个植物基因型而大面积单一种植,随着植物与病原物的协同进化,病虫害不断产生优势种和优势小种,给农业生产造成了严重损失。以后又依靠少数几种杀虫剂、杀菌剂来防治,又引起病虫害的抗药性迅速提高和生产成本猛增,同时也造成了严重的环境污染,而病虫害仍是农业生产的大
In traditional agro-ecosystems, interspecific and intraspecific plantings of plants allow the plants to be protected from diseases and insects to varying degrees. Since the beginning of the eighteenth century, agricultural production has relied on only a few plant genotypes for large-scale monoculture. With the co-evolution of plants and pathogens, pests and diseases continue to produce dominant species and dominant races, causing serious losses to agricultural production . Since then, they have also relied on a few pesticides and bactericides to prevent and cure them. This has also led to the rapid increase in the resistance of pests and diseases and the soaring cost of production. At the same time, it has also caused serious environmental pollution, while pests and diseases are still large in agricultural production