Inhibitive Effect of Silver Polyethylene Film on Soybean Dwarf Virus Infection and Economical Treatment in Kidney Beans
1992 Volume 1992 Issue 43 Pages 63-65
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1992 Volume 1992 Issue 43 Pages 63-65
The inhibitive effect of silver polyethylene film on soybean dwarf virus (SDV) infection in kidney beans and economical treatment were tested at three commercial orchards in an annually damaged region in the southern Tokachi district. The kidney bean cultivar was Taisho-Kintoki, and the planting density was 8000 hills (0.6m×0.2m) per 10 are. Silver polyethylene film (0.03mm thick) was placed in four rows, and was mulched over three ridges 50m long in each row. The nontreated parts of each silver mulch were varied at intervals of one, three, and five ridges respectively. The SDV infection rate of the center ridge in the silver mulched part was notably low under severe damage conditions. The inhibitive effect of silver mulch to the nontreatment parts was fairly effective at the three ridges intervals.
