Control of white root rot [Rosellinia necatrix] on Japanese pear [Pyrus pyrifolia] using metam-sodium
2007
Nitta, H.(Hiroshima-ken. Technology Research Inst., Higashihiroshima (Japan). Agricultural Technology Research Center)
From 1998 to 2001, field experiments were conducted to control white root rot caused by Rossellinia necatrix on Japanese pear using the fumigant metam-sodium. These experiments showed that control of the disease in soil where white root rot had occurred could be achieved for 1 or 2 years after the treatment. The most effective treatment method was as follows. The soil to be treated with chemical should be dug over beforehand to a depth of 50 cm and left loosely heaped. A metam-sodium solution of 30% technical product should be diluted to 0.06%. Then 60 liters of the dilute solution of metam-sodium per 1 square m of ground should be incorporated evenly by spraying over the already prepared soil. The soil should be piled up without strong mixing during the chemical application, and then kept covered with PVE film for the next 1 month. After the PVE film has been removed, the treated soil should be cultivated to ensure any remaining chemical is completely released. Following the process mentioned above, the compaction of the chemically treated soil is not adversely effected and plants subsequently transplanted into it grow normally.
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