Petunia Tobacco Necrosis Virus Disease
2019-09-08 06:03:58
(TobacconecrosisvirusdiseaseofPetunia)
[Symptoms] Yellow mottled and large necrotic spots were found on the diseased leaves.
[pathogen] tobacco necrosis virus (TobacconecrosisNecrovirus, TNV). Belongs to the genus of tobacco necrosis virus. Viral particles are 26 nm diameter spheres. Single-stranded RNA, which weighs 19%, has a viral genome of 3762 nt. The lethal temperature of the virus in susceptible tobacco sap was 85-95°C; A260/280 was 1.7; the in vitro survival time was 20 days at several days, and it was several years at -20°C.
[Implications] The oil-borne spores of oil-pot bacteria in the soil are transmitted. The poisoning effect depends on the compatibility of the strain, the physiological race of the fungus, and the host; the juice can also spread.
[Control]
1. The soil medium used for greenhouse cultivation or potted petunia needs to be sterilized.
2. Eliminate the roots of petunias in the soil.
[Symptoms] Yellow mottled and large necrotic spots were found on the diseased leaves.
[pathogen] tobacco necrosis virus (TobacconecrosisNecrovirus, TNV). Belongs to the genus of tobacco necrosis virus. Viral particles are 26 nm diameter spheres. Single-stranded RNA, which weighs 19%, has a viral genome of 3762 nt. The lethal temperature of the virus in susceptible tobacco sap was 85-95°C; A260/280 was 1.7; the in vitro survival time was 20 days at several days, and it was several years at -20°C.
[Implications] The oil-borne spores of oil-pot bacteria in the soil are transmitted. The poisoning effect depends on the compatibility of the strain, the physiological race of the fungus, and the host; the juice can also spread.
[Control]
1. The soil medium used for greenhouse cultivation or potted petunia needs to be sterilized.
2. Eliminate the roots of petunias in the soil.
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