Latent disease of carnation

[symptoms] there are few or no symptoms on carnation. The infection of carnation latent virus alone is not serious, but when it is co-infected with carnation vein mottle virus, it produces serious mosaic.

Carnation latent virus (CarnationlatentCaravirus,CLV). It belongs to the genus Carnation latent virus. The virion is straight or slightly curved linear, 652nm × 12~13nm, and it has also been reported as 620~690nm × 10~12nm. The sedimentation coefficient is 167s and the nucleic acid content is 6%. The lethal temperature was 60-65 ℃, the end point of dilution was 0.001-0.0001, and the in vitro survival time was 2-3 days after 20 ℃, and it was also reported that it was 6-9 days. Serologically, this virus is closely related to chrysanthemum B virus and freesia mosaic virus. At present, the differential parasitism between carnation latent virus and other carnation viruses has not been found. Both CLV and CaVMV can be transmitted to healthy American carnation through peach aphids, but 60 ℃ 10min heat treatment may remove CaVMV. There are some studies on the 3 'end of the gene. There is no report on strain research.

Although the juice can transmit the virus, it is difficult to transmit the virus directly from carnation to other plants due to the presence of inhibitors in the juice. But the virus can still infect a variety of plants other than Caryophyllaceae. Peach aphid is transmitted by non-persistent transmission.

[prevention and control] refer to the control method of carnation vein mottle virus.

(ref: prevention and control of carnation vein mottle virus

⒈ carnation plants are difficult to be detoxified by heat treatment, but they are easy to be detoxified by stem tip culture. The virus-free seedling was used as the breeding female parent to establish the virus-free female parent base.

⒉ uses 40% dimethoate EC 1000 times, or 40% omethoate EC 1000 times, or 80% dichlorvos EC 1000 times to control aphids and reduce vector insects.

⒊ should pay attention to field hygiene management, tool disinfection and reduce man-made transmission.

⒋ attaches great importance to disease resistance breeding. Chinese carnation has strong disease resistance, but the flowers are small and poor in color, while carnation has the characteristics of large flowers and fresh flowers. Various measures were adopted to cultivate new varieties of carnation with a variety of excellent characters and strong disease resistance.