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首页> 外文期刊>African Journal of Biotechnology >The impact of carbon dioxide in stored-product insect treatment with phosphine
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The impact of carbon dioxide in stored-product insect treatment with phosphine

机译：二氧化碳对磷化氢处理昆虫产品的影响

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In laboratory experiments, toxicity of carbon dioxide and carbon dioxide - phosphine mixture was investigated against 4 species of stored-product insects. In empty-space trials, estimates of the median lethal doses of carbon dioxide against adults ofOryzaephilus surinamensis?(L.),?Lasioderma serricorne?(F.) and eggs of?Plodia interpunctella?(Hǘbner) and?Cadra cautella?(Walker) were 7.67, 12.10, 5.76 and 7.25 mg/L, respectively. Penetration tests revealed that, carbon dioxide vapors could penetrate into the foodstuff mass and kill concealed insects in foodstuff spaces. Comparison of LD50?values between empty-space tests and penetration experiments after 24 h exposure indicated that, the increase in penetration toxicity was 3.61, 2.90, 4.02 and 3.03-fold for?O. surinamensis, L. serricorne,?P. interpunctella?and?C. cautella,?respectively. In the hidden infestation trials, the carbon dioxide-phophine mixture destroyed developmental stages of tested insects?concealed inside the foodstuff spaces. These results to a complete control with CO2?– phosphine mixtures for 24 h and subsequently, observed during 7, 10 and 11 weeks after the exposure. It is concluded that, combination of carbon dioxide?with reduced dose of phosphine could be considered as a viable alternative to methyl bromide under field conditions due to much wider margin of safety for operational personnel and substantiate fewer undesirable environmental side effects.
机译：在实验室实验中，研究了二氧化碳和二氧化碳-膦混合物对4种储藏昆虫的毒性。在空域试验中，估算了成年的Oryzaephilus surinamensis？（L。）、? Lasioderma serricorne？（F.）和？Plodia interpunctella？（Hǘbner）和？Cadra Cautella？（Walker）的成虫的二氧化碳中值致死剂量。 ）分别为7.67、12.10、5.76和7.25 mg / L。渗透测试表明，二氧化碳蒸气可渗透到食品团块中并杀死食品空间中的隐蔽昆虫。暴露24小时后，在空白空间测试和渗透实验之间的LD50δ值比较表明，渗透压的增加毒性是O的3.61、2.90、4.02和3.03倍。 surinamensis，L. serricorne，？P。间点菌和？小提琴，分别。在隐藏的侵扰性试验中，二氧化碳-膦混合物破坏了被测试昆虫的发育阶段-隐藏在食品空间内。这些结果可以完全控制二氧化碳和磷化氢混合物达24小时，然后在暴露后7、10和11周内观察到。结论是，由于对操作人员的安全裕度更大，并且减少了较少的不良环境副作用，因此在野外条件下将二氧化碳与降低剂量的膦组合使用可以视为甲基溴的可行替代品。

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