بررسی کارایی نماتدکش فلوپیرام در مدیریت نماتد ریشه گرهی باغات انار در استان مرکزی

The use of chemical nematicides is considered as one of the most effective ways to rapidly reduce the population of plant parasitic nematodes. The efficacy of Velum or Fluopyram 40% nematicide (Velum® Prime 400 SC) was tested for the management of pomegranate root knot nematode (Meloidogyne incognita) with 4 treatments (1- Velum with the recommended dose of Bayer Parsian Company (BPC), 625 ml of commercial form per hectare (twice with an interval of one month) 2- Velum with a dose lower, 500 ml of commercial form per hectare (twice with an interval of one month) 3- Control with comparative nematicide (Rugby 10% granules) at the rate of 150 kilograms of commercial form per square meter (one time) 4- Control without nematicide) in three replications (each replication whit three trees) in two infected pomegranate ( 19 years, cultivar Malas Saveh) orchards in Markazi province with two different irrigation methods, drip and flooding, in the form of a factorial experiment (factor A includes two types of irrigation and factor B includes different amounts of nematicides) based on a randomized complete blocks design. The comparison of the average interaction effect of irrigation method and nematicide treatments on the reproduction factor showed that Velum nematicide had the greatest effect in reducing nematode reproduction factor (0.03) related to the 625-dose treatment, which had a significant difference with the rest of the treatments at 5% level in flood irrigation conditions. In the condition of drip irrigation, even though the lowest reproduction factor was related to the 625-dose treatment (0.26), but it was not significantly different from the 500-dose treatment tested in this research (0.393). Therefore, due to the high cost of this nematicide, a lower dose (500) will be recommended for the gardener in terms of drip irrigation. Although the rapid effect of this chemical nematicide on all types of plant parasitic nematodes has been reported from the world and Iran, and the results obtained in this experiment are another evidence for this claim; But due to the exponential increase of root knot nematode sometime after removing the Velum effect in the soil, it is suggested to use integrated management and biological control methods.