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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：麦达斯对佛罗里达州商业花卉生产中线虫的影响

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Cut ?ower producers currently have limited options for nematode control.Four ?eld trials were conducted in 2006 and 2007 to evaluate Midas (iodomethane:chloropicrin 50:50) for control of root-knot nematodes (Meloidogyne arenaria) onCelosia argenteavar.cristatainacommercial?oricultureproduction?eldinsoutheasternFlorida.Midas(224kg/ha)wascomparedtomethyl 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 signi?cantly 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 ?rst 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 dif?culty of reducing high root-knot nematode population levels in soil in subtropical conditions in production ?elds that have been repeatedly fumigated.Although soil population density may remain stable, root population density and disease can be reduced.
机译：割草机生产者目前对线虫的控制选择有限。2006年和2007年进行了四个领域的试验，以评估麦达斯（碘甲烷：氯吡啶50:50）对鸡冠花根结线虫（Meloidogyne arenaria）的控制。在佛罗里达州的田野中，将Midas（224kg / ha）与甲基溴：氯吡啶（98：2，224 kg / ha）和未经处理的对照进行了比较。评估了该处理对每个季节土壤中根结线虫J2和自由活动线虫的影响，以及每个季节结束时的根，还评估了植物的生长和根系疾病，从土壤中分离的线虫的种群水平在本季节初期的所有试验中变化很大，并且通常在收获后反弹，有时在熏蒸处理中比在土壤中高。尽管在生长季节土壤线虫的种群水平没有显着降低，但根部的线虫和结实的线虫在生长结束时没有明显减少。与未处理的对照相比，甲基溴和Midas的季节均持续减少。在第一年的Midas处理中观察到植物毒性的症状，并归因于Fe毒性。第二年对施肥进行了调整，以研究潜在的熏蒸剂/肥料之间的相互作用。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J含量较高的Fe（3.05％）处理过的根中分离出的J2较少。与Fe EDTA相比，用这种肥料处理过的甲基溴处理过的地块中的蔗糖酸减少，并且擦伤减少。与Fe EDTA相比，用Midas处理的Fe硫酸盐施肥地块中的擦伤也减少了。在亚热带条件下，土壤中的结节线虫种群水平已经反复熏蒸。强度可以保持稳定，可以减少根系种群密度和疾病。

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