Green Pepper Carrying a Resistance Gene as a Cleaning Crop for Reducing Pepper Mild Mottle Virus Soil Density and Suppression of Symptom Appearance in the Following Cultivation - ISHII, Ryouji; OGAWA, Takayuki; TSUDA, Shinya; UEDA, Yasuo; TANAKA, Kunio (Annual Report of the Kanto-Tosan Plant Protection Society, 2007)