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首页> 外文期刊>Journal of Nematology >Effects of Midas? on Nematodes in Commercial Floriculture Production in Florida
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Effects of Midas? on Nematodes in Commercial Floriculture Production in Florida

机译：Midas的影响？佛罗里达商业花卉生产中的线虫研究

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Cut flower producers currently have limited options for nematode control. Four field trials were conducted in 2006 and 2007 to evaluate Midas® (iodomethane:chloropicrin 50:50) for control of root-knot nematodes (Meloidogyne arenaria) on Celosia argentea var. cristata in a commercial floriculture production field in southeastern Florida. Midas (224 kg/ha) was compared to methyl bromide:chloropicrin (98:2, 224 kg/ha), and an untreated control. Treatments were evaluated for effects on Meloidogyne arenaria J2 and free-living nematodes in soil through each season, and roots at the end of each season. Plant growth and root disease were also assessed. Population levels of nematodes isolated from soil were highly variable in all trials early in the season, and generally rebounded by harvest, sometimes to higher levels in fumigant treatments than in the untreated control. Although population levels of nematodes in soil were not significantly reduced during the growing season, nematodes in roots and galling at the end of the season were consistently reduced with both methyl bromide and Midas compared to the untreated control. Symptoms of phytotoxicity were observed in Midas treatments during the first year and were attributed to Fe toxicity. Fertilization was adjusted during the second year to investigate potential fumigant/fertilizer interactions. Interactions occurred at the end of the fourth trial between methyl bromide and fertilizers with respect to root-knot nematode J2 isolated from roots and galling. Fewer J2 were isolated from roots treated with a higher level of Fe (3.05%) in the form of Fe sucrate, and galling was reduced in methyl bromide treated plots treated with this fertilizer compared to Fe EDTA. Reduced galling was also seen with Midas in Fe sucrate fertilized plots compared to Fe EDTA. This research demonstrates the difficulty of reducing high root-knot nematode population levels in soil in subtropical conditions in production fields that have been repeatedly fumigated. Although soil population density may remain stable, root population density and disease can be reduced.
机译：切花生产商目前对线虫的控制选择有限。 2006年和2007年进行了四项田间试验，以评估Midas®（碘甲烷：氯吡啶50:50）对控制鸡冠花根结线虫（Meloidogyne arenaria）的控制作用。在佛罗里达州东南部的商业花艺生产领域中的红景天。将Midas（224 kg / ha）与甲基溴：氯吡啶（98：2，224 kg / ha）和未处理的对照进行了比较。在每个季节以及每个季节结束时，评估处理对土壤中根结线虫J2和自由活动线虫的影响。还评估了植物生长和根部疾病。在季节初的所有试验中，从土壤中分离出的线虫的种群水平变化很大，并且通常随着收获而反弹，有时熏蒸处理中的线虫水平要高于未处理的对照。尽管在生长季节土壤中线虫的种群水平并未显着降低，但与未处理的对照相比，甲基溴和麦达斯在根部和根部的gall虫线虫在季节结束时均持续减少。在第一年的Midas治疗中观察到了植物毒性症状，并归因于Fe毒性。在第二年对施肥进行了调整，以调查潜在的熏蒸剂/肥料相互作用。在第四次试验结束时，甲基溴和肥料之间发生了相互作用，相互作用是从根部和擦伤中分离出的根结线虫J2。从较高浓度的Fe（3.05％）的硫酸盐形式的根中分离出的J2较少，与用Fe EDTA相比，在用该肥料处理过的甲基溴处理过的地块中，gall积减少了。与Fe EDTA相比，Midas在Fe硫酸盐肥料样地中的磨损减少。这项研究表明，在亚热带条件下，要减少反复熏蒸的生产田地土壤中高根结线虫种群的难度。尽管土壤人口密度可能保持稳定，但可以减少根部人口密度和疾病。

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