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为解决广谱性化学杀虫剂因大量施用或滥用而引起一系列潜在问题的一种对策——害虫生物防治技术发展至今已有许多年了,化学杀虫剂的超量施用引起最严重的后果是环境和水源污染、食物链中可能的残留物、因天敌数量下降而使次要害虫上升为主要害虫以及害虫抗性品系的选择性等。生物防治剂一般可粗分为食虫昆虫(寄生和天敌昆虫)和昆虫致病源(如病毒、细菌、真菌、原生动物和线虫等)。这些不同的生物防治剂的主要特点见(表1)。
To solve the problem of a series of potential problems caused by extensive application or abuse of broad-spectrum chemical insecticides, pest biocontrol technology has been developed for many years now. Overexposure to chemical pesticides has caused the most serious Consequences are environmental and water pollution, possible residues in the food chain, secondary pests up to major pests due to declining numbers of natural enemies, and selectivity of pest resistant lines. Biological control agents generally can be roughly divided into insecticide insects (parasitic and natural enemy insects) and insect pathogenic (such as viruses, bacteria, fungi, protozoa and nematodes, etc.). The main features of these different biological control agents are shown in Table 1.