Transeius montdorensis(Acari:Phytoseiidae)在技术创生条件下的生物潜力

D. A. Popov*, A. V. Grintsevich
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引用次数: 0

摘要

亚热带螨类 Transeius montdorensis 在欧洲国家被广泛用于控制蓟马和其他吸食害虫。为了开发大规模饲养 T. montdorensis 的国内技术,对其生物潜力进行了大规模生产评估。在 26-27 °C的条件下,T. montdorensis 的生长速度为 0.19±0.017,倍增时间为 4.7±0.29天。在测试的螨虫密度范围(5-80 ind./ml)内,随着密度的增加,生长率呈下降趋势。这一趋势可以用对数曲线来近似表示。密度为 60-80 ind./ml 时,不仅种群增长率显著下降,而且波动范围也缩小。在捕食者密度较低(5-15 ind./ml)时,增长率波动较大,这可能是由于在某些容器中,捕食者无法抑制猎物(粉螨)的爆发。因此,猎物在基质中过度繁殖,导致基质被刺激微生物发展的废物污染。5-15 ind./ml 密度范围内的生长率低于预期,与 20-30 ind./ml 范围内的生长率差别不大。这表明猎物的无节制生长抑制了 T. montdorensis 的繁殖。种群倍增时间是一个可靠的指标,可用于筛选蒙氏梭菌的最佳种群培养物,使其在 6-8 天内(即基质中真菌大量生长之前)成功饲养到密度 60 ind./ml 的水平。20-30 ind./ml 的范围是大规模饲养的最佳起始密度,当捕食者密度达到 60 ind./ml 以上时,应重新安置或出售。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Biotic potential of Transeius montdorensis (Acari: Phytoseiidae) under technocenosis conditions
The subtropical mite species Transeius montdorensis is widely used to control thrips and other sucking pests in European countries. To develop a domestic technology for the mass rearing of T. montdorensis, its biotic potential has been evaluated under large scale production. The growth rate of T. montdorensis is 0.19±0.017, the doubling time is 4.7±0.29 days at 26–27 °C. In the tested range of mite densities (5–80 ind./ml), the growth rate tends to decrease as the density increases. This trend can be approximated by a logarithmic curve. The density 60–80 ind./ml causes not only a significant drop in the population growth rate but also the decrease in range of its fluctuations. Higher fluctuations of growth rate at lower predator densities (5–15 ind./ml) are probably due to the fact that, in some containers, the predator is unable to hold back outbreaks of its prey (the flour mite Tyrophagus entomophagus). As a result, the prey overpopulates the substrate, which causes its contamination by waste products stimulating microflora development. The growth rate in the density range of 5–15 ind./ml is lower than expected and does not differ significantly from that in the range of 20–30 ind./ml. This indicates that the prey uncontrolled growth inhibit the reproduction of T. montdorensis. The population doubling time is a reliable indicator for screening the best stock culture of T. montdorensis for its successful rearing up to density 60 ind./ml within 6–8 days, i.e., before mass growth of fungi in the substrate. The range of 20–30 ind./ml is the optimal starting density for mass rearing, and when the predator reaches a density of more than 60 ind./ml, it should be resettled or offered for sale.
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