全北 鳳東 生薑團地의 連作障害에 따른 生薑 病害蟲 被害에 관한 調査 硏究 = Survey of Diseases and Pest on Ginger Plants by Replanting Failure in Bongdong Areas of Ginger Field in Jeonbuk, Korea

다국어 초록 (Multilingual Abstract)

In order to investigate the various diseases and pest in ginger plants and their control, the infected ginger plants were treated with a total of eleven kinds of fungicides and insecticides: Othe-cide, Mercron, Vitaziram, Daconil, PCNB, Phosvel, Hinosan, Bla-S, Elsan, Sumithion, and Diazinon.
1. the ginger plants were infected mainly by bacterial soft rot(Pse-udmonas zingiberi Uyeda), Fusarium yellows(Fusarium oxysporium f. sp. zingiberi Trujillo), sheath bligth(Rhizoctonia salani Kato), leaf blast (Piricularia zingiberi Nishikado), Leaf wilt(Mycosphaerella zingiberi Shirai), leaf spot(phyllosticta zingiberi Hori) and European corn borer(pyrausta nubialis Hubner).
2. Among these diseases, the bacterial soft rot caused the most severe damage, and the frequency of occurrence was about 20 percent in the experimental fields. Also infection frequency was higher in fields where the ginger plants had replanted for a number of years.
3. Fusarium yellows which caused rotting of the rhizome was observed for the first time in ginger plants in the Bongdong area of Korea. The damage caused by the above disease was also serious and frequent.
4. The author confirmed the existence of virus dwarf disease in Korea. This disease is thought to be different from the cucumber mosaic virus(C M V) of Janan.
5. The control of bacterial soft rot was accomplished by either treating the seeds with Mercron or the roots with Otho-cide. The simultaneous treatment by both was not effective.
6. The control of leaf wilt was accomplished by treatment with PCNB, Daconil, or Hinosan.
7. Leaf spot was controlled through treatment Othe-cide, Daconil or Himosan.
8. Approximately 4 percent of the plants were infested with European corn borer this pest was successfully combatted be treatment with Sumithion, Elsan, or Phosvel.
As a results of the experiment, the following solutions concerning the problems associated with the yearly replanting of ginger plants were obtained: 1) soft rot and Fusarium yellows which are contracted by the seed-pieces from infected soil must be controlled. 2) The seed pieces must be collected from areas uninfected with virus disease. 3) Leaf spot, leaf wilt, and European corn borer, all of which affect the stem and leaf must be controlled by chemicals treatment at the appropriate times.