시설 및 노지재배 고추의 바이러스병 발생생태
Ecology of viral disease in pepper by cultivation types
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A total of 382 with virus-like symptoms pepper plants collected from greenhouses and open fields in Korea were investigated on the presence of Alfalfa mosaic virus (AMV), Tobacco mosaic virus (TMV), cucumber mosaic virus (CMV), Tomato soptted wilt virus (TSWV), Potato virus Y (PVY), Pepper mild mottle virus (PMMoV), Pepper mottle virus (PepMoV), Broad bean wilt virus2 (BBWV2), Tomato mosaic virus (ToMV), Ribgrass mosaic virus (RMV) and Tobacco mild green mosaic virus (TMGMV) by RT-PCR. The results indicate that no sample collected from both greenhouse and open field seems to be infected by TMV, RMV, AMV, and TSWV. Otherwise, CMV, BBWV2, PMMoV, PVY, TMGMV, ToMV, and PepMoV are identified by RT-PCR. The infection rates of the collected samples between greenhouse and open field are largely different. Comparing with 10% of virus-infected pepper samples grown in greenhouse, approximately one third of pepper samples collected from open field are infected. A large number of samples, at least 60%, from fields were co-infection by two to four different viruses, while only 16% of samples from greenhouses were co-infected. The dominant virus in greenhouse is PMMoV, indicating that virus-infected seed stocks and infected plant debris in the growing area may be important sources of inoculum. The majority was single or mixed infection of CMV, BBWV2 consisting of about 79.3% of the viruses detected in open field. BBWV2 is newly emerging virus disease to be controlled. The discrepancies on the distribution and the occurrence of viral diseases between field and greenhouse samples may provide a fat that the accumulation and distribution of inoculum by successive cultivation and the migration of viruliferous vectors into growing areas are likely to be important factors to determine the incidence of viral diseases. Therefore, the further studies on epidemiology and the consideration of new breeding program of pepper are essential to minimize virus diseases.