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植物寄生性线虫能引发蔬菜根结线虫病,植物土传病原菌能引发蔬菜枯萎病、黄萎病、根腐病、立枯病。上述二类病害就是以单一病原物形成单一病害的经典表述。但是在自然环境中,寄生线虫和土传病菌确是共处同一土壤生境中,必然存在着复杂的互作关系。经试验,同期接种土传病菌和寄生线虫,比各自单独接种时,招致的复合病害发生频率高、发病潜伏短、症状表现严重。如蔬菜寄生性线虫和尖孢镰刀菌复合侵染,定会加重瓜类枯萎病的发生。茄子黄萎病的发生也有类似现象。尽管在复合病害中以土传病害症状表现夺目,而寄生线虫确处无特异症状表现,但是实际上植物寄生线虫确是起重要作用,它是侵染先头兵。其因果原因有七方面:1)两病原的要求土壤湿润环境相
Plant parasitic nematodes can cause root-knot nematode disease, plant-borne pathogenic bacteria can cause vegetable wilt, Verticillium wilt, root rot, blight. The above two types of diseases are the classical expressions of single disease formed by a single pathogen. However, in the natural environment, the parasitic nematodes and soil-borne pathogens are indeed living in the same soil habitat, there must be complex interactions. After testing, the same period of inoculation of soil-borne pathogens and parasitic nematodes, compared with their respective inoculation, the incidence of complex diseases caused by high incidence of latent short, severe symptoms. Such as vegetable parasitic nematodes and Fusarium oxysporum compound infection, will increase the occurrence of melon Fusarium wilt. Eggplant Verticillium wilt also have a similar phenomenon. Although the symptom of soil-borne diseases is remarkable in complex diseases, parasitic nematodes do not show specific symptoms, but in fact the plant parasitic nematodes really play an important role, which is the pioneer of invasion. The cause and effect of seven aspects: 1) The requirements of two pathogens soil moist environment phase