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本报告是作者继探讨在不改变药剂的条件下,仍然使用磷化氢作为抗磷化氢害虫对策取得初步结果,结合近年国内外正在发展应用的气调贮粮即自然缺氧贮粮法,所作应用技术途径的进一步的研究。毒力测定结果证明,在自然缺氧所能达到的大气条件范围内,无论是氧的降低或二氧化碳的升高,都能够显著提高磷化氢对五种主要粮仓甲虫和强抗性米象的毒效。增效系数的大小,决定于害虫群体本身对磷化氢的忍受力。忍受力强的,增效系数也大;反之则小。增效系数与虫种,未发现显著的相关性。查明了氧的起始显著增效浓度为12％;二氧化碳的最佳增效浓度为4—8％。最易诱发抗性的米象蛹,在气调情况下,以中等磷化氢浓度,也可彻底除治。实验有力证明,延长密闭时间,可提高药效若干倍。结论指出,气调磷化氢熏蒸,不仅可降低药量提高药效,而且可作为抗性害虫的熏蒸对策。提出了气调熏蒸应用技术途径和展望性的评价。
This report is the author following the discussion without changing the pharmaceutical conditions, the use of phosphine as a preliminary anti-phosphine pest solution to obtain preliminary results, combined with domestic and foreign development and application of atmospheric storage grain that natural oxygen storage grain method, The application of technology to make further research. Toxicity test results show that in the range of atmospheric conditions that can be achieved by natural hypoxia, either oxygen reduction or carbon dioxide increase can significantly increase the effect of phosphine on the five main silos beetles and the strong resistance rice Toxicity. The size of the efficiency factor depends on the tolerance of the pest population to phosphine. Endure strong, synergistic coefficient is also large; otherwise small. There was no significant correlation between efficiency coefficient and insect species. The initial significant synergistic concentration of oxygen was found to be 12%; the optimal synergistic concentration of carbon dioxide was 4-8%. The most likely to induce resistance of rice pupal, in the case of tone, to moderate phosphine concentration, but also completely cure. Experiments prove that to extend the airtight time, can improve the efficacy several times. Conclusion pointed out that the atmosphere of phosphine fumigation, not only can reduce the dose to improve efficacy, but also as a fumigation countermeasures of pests. Proposed application of air-conditioning fumigation technology and prospects of evaluation.