Vein spot barge disease of carnation

[symptoms] systemic mosaic, mottled veins, old leaf occult disease in winter. The broken color of flowers, especially the petal broken color of red varieties is more serious.

Carnation vein mottle virus (Carnationveinmottlepotyvirus,CaVMV). The somes are linear, 790nm × 18~19nm, and also reported as 600~710nm × 13nm. The settlement coefficient is about 144s. A260,280,1.15. The antiserum test was similar to that of Ma Lingshu Y virus. The lethal temperature (TIP) was 60 ~ 65 ℃, the end point of dilution (DEP) was 10 ~ (- 3) × 10 ~ (- 5), and the external survival time (LIV) was 2 ~ 10 days at 13 ℃. The virus particles are dispersed in the cytoplasm and have wind wheel-like inclusions. Carnation vein mottle virus and carnation latent virus can be distinguished by serum reaction and electron microscopic observation. Inoculation with American carnation is the most convenient because the carnation latent virus does not cause symptoms in American carnation. Other carnation viruses (such as mottle, ringspot, etch ring, Italian ringspot) all have equal diameter symmetrical plasmids, which make the corresponding indicator plants show obvious symptoms.

There were few studies on the strains of the virus, and it was found that although different isolates caused carnation to produce similar symptoms, their infection ability on amaranth quinoa was different; typical strains infected thousand-day red and tail amaranth caused systematic vein mottling, but other isolates did not infect. There was also a small difference in in vitro survival time.

[incidence regularity] the peach aphid was transferred to virus in a non-persistent way. But the juice spreads. It has not been found that the seeds of fennel and American carnation can transmit virus. If the virus-carrying plant is used as cutting material, the virus will occur greatly.

[prevention]

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.