PDF(Pubmed)
Abstract：
Many organisms, including beneficial entomopathogenic nematodes (EPNs), are commonly found in the soil environment. EPNs are used as biopesticides for pest control. They have many positive characteristics and are able to survive at sites of application for a long time, producing new generations of individuals. The occurrence of populations depends on many environmental parameters, such as temperature, moisture, soil texture, and pH. Extreme temperatures result in a decrease in the survival rate and infectivity of EPNs. Both high humidity and acidic soil pH reduce populations and disrupt the biological activity of EPNs. Nematodes are also exposed to anthropogenic agents, such as heavy metals, oil, gasoline, and even essential oils. These limit their ability to move in the soil, thereby reducing their chances of successfully finding a host. Commonly used fertilizers and chemical pesticides are also a challenge. They reduce the pathogenicity of EPNs and negatively affect their reproduction, which reduces the population size. Biotic factors also influence nematode biology. Fungi and competition limit the reproduction and survival of EPNs in the soil. Host availability enables survival and affects infectivity. Knowledge of the influence of environmental factors on the biology of EPNs will allow more effective use of the insecticidal capacity of these organisms.
摘要：
许多生物,包括有益的昆虫病原线虫（EPN），常见于土壤环境中。EPN被用作用于害虫控制的生物农药。它们具有许多积极的特性，能够在应用场所长时间存活，培养新一代的个体。种群的发生取决于许多环境参数，如温度，水分,土壤质地,和pH。极端温度导致EPN的存活率和传染性降低。高湿度和酸性土壤pH都会减少种群并破坏EPN的生物活性。线虫也暴露于人为病原体，如重金属，油,汽油,甚至精油。这些限制了它们在土壤中移动的能力，从而减少他们成功找到主机的机会。常用的化肥和化学农药也是一个挑战。它们降低EPN的致病性并对其繁殖产生负面影响，这减少了人口规模。生物因子也影响线虫生物学。真菌和竞争限制了土壤中EPN的繁殖和存活。宿主的可用性使生存和影响感染性。了解环境因素对EPNs生物学的影响将允许更有效地利用这些生物的杀虫能力。
