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首页> 外文期刊>Crop Protection >Comparative toxicity of selected insecticides to pea plants and growth promotion in response to insecticide-tolerant and plant growth promoting Rhizobium leguminosarum
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Comparative toxicity of selected insecticides to pea plants and growth promotion in response to insecticide-tolerant and plant growth promoting Rhizobium leguminosarum

机译：选择性杀虫剂对豌豆植物的比较毒性和对耐杀虫剂和植物生长促进豆科根瘤菌生长的促进作用

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摘要

Laboratory and field/pot experiments were conducted to determine the effect of two insecticides, fipronil and pyriproxyfen, on growth, symbiotic properties (nodulation and leghaemoglobin content), amount of N and P nutrients in plant organs, seed yield and seed protein of pea plants. In addition, the role of the most promising fipronil and pyriproxyfen tolerant Rhizobium leguminosarum strain MRP1 having plant growth promoting traits such as, production of phytohormones and siderophores, was also assessed in the presence and absence of both insecticides. Generally, fipronil and pyriproxyfen at the tested rates (recommended and higher doses) decreased the growth of both R. leguminosarum inoculated or uninoculated pea plants. Of the various concentrations of the two insecticides, pyriproxyfen at all concentrations in general, showed comparatively more severe toxicity to pea plants by decreasing plant biomass, symbiotic attributes, nutrients (nitrogen and phosphorus) uptake, seed yield and grain protein over the uninoculated control. The sole application of 3900og pyriproxyfenkgp# soil (three times the recommended dose) showed the highest toxicity and decreased the root nitrogen, shoot nitrogen, root phosphorus, shoot phosphorus, seed yield and grain protein by 20%, 27%, 25%, 29%, 15% and 2% respectively, compared to the control. Interestingly, when the inoculant strain MRP1 was used with any concentration of the two insecticides, it significantly (PT0.05) increased the measured variables (plant dry weight, nodule numbers, dry nodule biomass, leghaemoglobin, nitrogen and phosphorus uptake, seed yield and grain protein) when compared to the plants grown in sandy clay loam soils treated solely (without inoculant) with the same individual treatment of each insecticide. For instance, three times the recommended dose of pyriproxyfen with strain MRP1 showed a highest stimulatory effect and increased the root nitrogen, shoot nitrogen, root phosphorus, shoot phosphorus, seed yield and grain protein by 108%, 124%, 119%, 153%, 112% and 6% respectively, compared to the plants grown in soil treated solely with three times the recommended dose of pyriproxyfen.
机译：进行了实验室和田间/盆栽试验，以确定两种杀虫剂氟虫腈和吡虫杀酚对豌豆植物生长，共生特性（结瘤和血红蛋白含量），植物器官中氮和磷养分的含量，种子产量和种子蛋白的影响。此外，在有和没有两种杀虫剂的情况下，还评估了最有前途的氟虫腈和吡咯烷酮耐受性豆蔻根瘤菌菌株MRP1具有促进植物生长的特性，例如植物激素和铁载体的产生。通常，以测试的速率（推荐剂量和更高剂量）使用氟虫腈和吡吡氧芬会降低豆科植物念珠菌接种或未接种的豌豆植物的生长。在两种杀虫剂的不同浓度中，一般而言，所有浓度的吡虫杀芬都比未接种的对照降低了豌豆植物的生物量，共生特性，养分（氮和磷）的吸收，种子产量和谷类蛋白质，从而对豌豆植物表现出相对更严重的毒性。单独施用3900og pyriproxyfenfenkgp＃土壤（推荐剂量的三倍）显示出最高的毒性，并使根氮，苗氮，根磷，苗磷，种子产量和谷物蛋白质减少了20％，27％，25％，29与对照相比，分别为％，15％和2％。有趣的是，当将孕育菌株MRP1与任何浓度的两种杀虫剂一起使用时，它显着（PT0.05）增加了测量变量（植物干重，根瘤数，干燥根瘤生物量，豆血红蛋白，氮和磷吸收，种子产量和谷物蛋白）与在沙质壤土中生长的植物（仅用一种杀虫剂进行相同的单独处理（不含接种剂））进行比较。例如，三倍于吡虫啉的推荐剂量与菌株MRP1一起显示出最高的刺激效果，并使根氮，地上部氮，根部磷，地上部磷，种子产量和谷物蛋白增加了108％，124％，119％，153％分别比仅用推荐剂量三倍的吡ip昔芬处理过的土壤中的植物高出112％和6％。

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