Hot water immersion of Allium hookeri roots for the controlof the plant parasitic nematodes Meloidogyne javanica andPratylenchus coffeae
2017
Cho, D.H., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Park, B.R., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Chun, J.Y., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Noh, Y.H., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Kim, Y.H., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Park, M.G., Animal and Plant Quarantine Agency, Gimcheon, Republic of Korea | Kim, D., Kyungpook National University, Daegu, Republic of Korea | Lee, K.Y., Kyungpook National University, Daegu, Republic of Korea
Nematodes are important quarantine pests of bulbous plants such as hooker chives.Although control methods such as fumigation, chemical immersion, and heat areoften applied, it has proved difficult to disinfect nematodes from plant roots inquarantine. As heat treatment has been successfully useful for the control ofnematodes in other agricultural products in quarantine, we investigated thesusceptibility and mortality rates of Meloidogyne javanica and Pratylenchus coffeae,which infest hooker chive roots, using a hot water immersion method. Heat damageto the hooker chive roots was noticeable at temperatures over 50℃. Temperatures forthe effective time to kill 99% at 1 min (ET99) for M. javanica and P. c o f f e a e juvenileswere 49.3°C and 49.1℃, respectively. However, the time to kill 99% of M. javanicaeggs at 48℃ and 49℃ were 27.0 min and 8.3 min, respectively. Using a thermalequilibrium formula, the optimum commercial scale condition, in a 1400-L chamber,for nematode control without associated plant damage was water immersion at48.2℃ for 30 min or at 49.2℃ for 13 min with a filling ratio less than 12%. Thisresult can be applicable for the nematode disinfestation of hooker chive roots in plantquarantine.
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