A Study on the Establishment of Standard Amount of Pesticide in Applying the Sea Water Dipping Disinfection Method for the Imported Soft Woods. -Estimation of the Required Amount of Pesticide on the Area of Lumber over the Sea Level-

수입원목의 해수수침소독에 있어 농약소요량 산출에 관한 연구 -원목의 부상부위표면적을 기준한 농약소요량 판단-

  • Hah J.K. (National Plant Quarantine Office) ;
  • Kim B.H. (National Plant Quarantine Office, Inchon Station) ;
  • Shin I.K. (National Plant Quarantine Office, Inchon Station) ;
  • Kim J.H. (National Plant Quarantine Office, Inchon Station)
  • 하재규 (국립식물검역소) ;
  • 김병호 (국립식물검역소 인천지소) ;
  • 신인균 (국립식물검역소 인천지소) ;
  • 김중환 (국립식물검역소 인천지소)
  • Published : 1980.12.01

Abstract

The purpose of this study is to establish a standard amount of pesticide per unit area of the lumber over the sea level. This establishment is required in applying the sea water dipping disinfection method to the imported soft woods to control the pests living on the surface of the lumber. The major findings of this study are as follows; 1. The average length and diameter of the imported soft wood was respectively 11.12m and 76.46Cm. 2. The average cubic content of the lumber over the sea level to the whole cubic content was 20.82 percent. 3. The ratio of the lumber over the sea level to the whole cubic content was 2.3356 at the $95\%$ significance level. 4. The sampling error of the ratio of the area of the lumber over the sea level to the cubic content was lower in the case of the pieces of lumber in a vessel than the average between ten tressels. 5. The optimum amount of pesticide spray per $1\;M^2$ of the soft wood was 0.298 cc in the case of using the hand spray, but 0.245 cc the motor spray. 6. For example, in the case of applying the sea water dipping disinfection method to the 5,000 $M^3$ of the imported soft wood, the required amount of pesticide with a motor spray can be estimated as follow. $$5,000\;M^3\times2.333=11,678\;M^2$$ $$11,678M^2\times0.295=3,445cc$$.

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