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首页> 外文期刊>Journal of Nematology, with Annual of Applied Nematology >Effects of Midas~R on Nematodes in Commercial FloricultureProduction in Florida
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Effects of Midas~R on Nematodes in Commercial FloricultureProduction in Florida

机译：Midas〜R对佛罗里达州商业花卉生产中线虫的影响

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Cut flower producers currendy have limited options for nematode control. Four field trials were conducted in 2006 and 2007 to evaluate Midas~R(iodomethanexhloropicrin 50:50) for control of root-knot nematodes (Meloidogyne arenaria) on Celosia argenteavar. cristataixa a commercial floriculture production field in southeastern Florida. Midas (224 kg/ha) was compared to methyl bromidexhloropicrin (98:2, 224 kg/ha), and an untreated control. Treatments were evaluated for effects on Meloidogyne arenaria]2and 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 significandy reduced during the growing season, nematodes in roots and galling at theend of the season were consistently reduced with both methyl bromide and Midas compared to the untreated control. Symptoms of phyto-toxicity 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 Fesucrate 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：切花生产者目前对线虫的控制选择有限。 2006年和2007年进行了四个田间试验，以评估Midas〜R（碘甲烷xhloropicrin 50:50）对根冠线虫的根结线虫（Meloidogyne arenaria）的控制作用。 cristataixa位于佛罗里达州东南部的商业花艺生产场。将Midas（224千克/公顷）与甲基溴地索罗珀辛（98：2，224 kg /公顷）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2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，并且通常因收获而反弹，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数量没有显着减少，但与未处理的对照相比，甲基溴和麦达斯在根季和结扎期的线虫都持续减少。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。从较高水平的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，用该肥料处理的甲基溴处理过的地块的结垢减少。与Fe EDTA相比，在Fesucrate受精地块中，Midas还可以减少磨损。这项研究证明了在亚热带条件下减少反复熏蒸的生产田中土壤中高根结线虫种群数量的困难。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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