Population suppression of plant-parasitic nematodes using nematicides in fruit vegetables cultivation area in Korea

Korean fruit vegetables fields with plastic vinyl and glass house have shown a consistently increasing trend, and recently fruit vegetables field scale have becoming bigger and bigger. Also, they are repeated cultivation for several years in the same place. In addition, year-round cultivations were increased the density of plant-parasitic nematodes in soil and the consequential economic damage has been increased the damage problems. Therefore, to know the control effect of plant-parasitic nematodes in fruits and vegetables field, soil samples were collected from cucumber cultivation at Gongju, strawberry cultivation at Buyeo and Nonsan and Jinju, and melon cultivation at Gocksung in Jeonnam in Korea. Plant-parasitic nematodes were separated from each soil sample and identified. To know susceptibilities of plant-parasitic nematodes against 4 nematicides, we were examined the average population density of plant-parasitic nematodes before and after treatment of nematicides. The average population density of plant-parasitic nematodes in most of soil samples were decreased after treatment of nematicides, however, there were increased population density with treatments of fosthiazate, abamectin, cadusafos and dazomet to soil sample collected from Gocksung. Cadusafos 3% and dazomet 98% were effective 100% of control effects against Pratylenchus spp. in soil samples collected from Buyeo and Nonsan, however, the only cadusafos 3% was effective 100% against Pratylenchus spp. in soil samples collected from Jinju. Average population density of plant-parasitic nematodes reduced in most of soil samples after nematicides treatment, it might be suggested that treatment of nematicides against plant parasitic nematodes was important for control of that.