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首页> 外文期刊>Nematropica >RATES AND APPLICATION TIMING OF 1,3-DICHLOROPROPENE FOR THE MANAGEMENT OF MELOIDOGYNE INCOGNITA AND ROTYLENCHULUS RENIFORMIS ON COTTON
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RATES AND APPLICATION TIMING OF 1,3-DICHLOROPROPENE FOR THE MANAGEMENT OF MELOIDOGYNE INCOGNITA AND ROTYLENCHULUS RENIFORMIS ON COTTON

机译：1,3-二氯丙烯对棉铃虫和轮虫的管理速率及应用时机

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摘要

Replicated fumigation field trials were conducted at separate sites in Florida. One site was naturally infested with Meloidogyne incognita and the other with Rotylenchulus reniformis . The fumigant, 1,3- dichloropropene (1,3-D), was applied at rates of 16, 32, and 48 kg a.i./ha at 92, 63, 36, and 2 days before planting (DBP) Delta Pine 458BR cotton at the M . incognita site and at 69, 37, 12, and 0 DBP at the R. reniformis site. All treatments were replicated six times. Yields in the non-treated controls at the M . incognita site averaged 349 kg/ha of cotton lint whereas those across rates and timing in the 1,3-D treatments averaged 504 kg/ha. All 1,3-D treatments significantly reduced post-harvest numbers of M. incognita (12 J2/100 cm 3 soil across rates and timing) compared with the non-treated controls (460 J2). At the R. reniformis site, the non-treated controls averaged 353 kg lint/ha while 1,3-D treatment across rates and timing averaged 450 kg/ha. Post-harvest R. reniformis soil population densities of all nematode stages were not influenced by treatment (3048/100 cm 3 soil from non-treated and 3040 in the 1,3-D treatments across rates and timing). Since there were no significant negative effects from timing of application, these studies indicate that profitable applications of 1,3-D may be accomplished earlier and later than the current application recommendation of 10-21 days before planting.
机译：复制熏蒸现场试验在佛罗里达州的不同地点进行。一个地点自然感染了根结线虫（Meloidogyne incognita），另一个地点发生了Rotylenchulus reniformis。熏蒸剂1,3-二氯丙烯（1,3-D）在种植（DBP）Delta Pine 458BR棉花之前的92、63、36和2天以16、32和48 kg ai / ha的速率施用。在M处。隐孢子虫位点，以及在肾形假单胞菌位点的DBP分别为69、37、12和0。所有处理重复六次。在M处未经处理的对照中的产量。隐身部位平均棉绒349公斤/公顷，而1,3-D处理中不同速率和时间的棉绒平均504公斤/公顷。与未处理的对照组（460 J2）相比，所有1,3-D处理均显着降低了隐孢子虫的收获后数量（跨速率和时间分布为12 J2 / 100 cm 3土壤）。在肾形目R.地点，未经处理的对照平均皮棉353公斤/公顷，而按速率和时间进行的1,3-D处理平均450公斤/公顷。所有线虫阶段的捕捞后R. reniformis土壤种群密度均不受处理的影响（未处理的土壤为3048/100 cm 3土壤，而1,3-D处理的土壤和土壤中的比率为3040）。由于施药时间没有明显的负面影响，因此这些研究表明，可以比种植前10-21天的当前施药建议更早和更晚地完成1,3-D的有益施肥。

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