Techniques for preventing carnation rust

Carnation rust is widely distributed and is a worldwide disease.
【Pathogen】 Uromyces caryophyllinus (Schrank) Wint.] belongs to the genus Basidiomycotina and Uromyces spp. To host the host rusty bacteria.
【Symptoms】 The disease mainly damages the leaves and also harms stems and flower buds. The affected area initially had pale, small, protuberant spots, and it was yellow at the periphery. In severe cases, the leaves and stems are twisted. During the growing season, a small brown powder pile appears on the back of leaves or stems and bracts, which is the uredia spores heap of pathogens. In autumn and winter, black powder piles appear at the affected sites, which is the teliospores heap of pathogens.
【Pathogenesis】 The pathogens overwinter on susceptible plants. At springtime, the spores germinate to produce burdens and spores; the spores impregnate the plants of the genus Euphorbia and form sporozoites and rust spores on the leaves. After the diatoms were impregnated with carnations, they formed uredia spores on them; summer spores spread with the wind or water and were re-infiltrated. At the end of the growing season, a teliosporn heap is produced.
[Popularity] High temperature and humidity are favorable to the epidemic.
【Prevention】
A. Strengthen ventilation and ventilation of greenhouses, try to keep the temperature at about 15°C. A cool, dry and dry environment will facilitate the growth of carnation and the development of unfriendly rust.
B. When breeding seedlings, cuttings should be taken from disease-free plants.
C. Avoid sprinkler irrigation for the spread of pathogenic bacteria. If sprinkler irrigation is needed, it should be done on a sunny day.
D. In the onset stage, spraying with 50% Versatrol 1000x or 65% Zeoxin 600x can be used, and the medicament can also be formulated into a modern irrigation system for application.

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