Safflower sandalwood, also known as red stepwood, leaf color bright red, is a rare evergreen color leaf ornamental plant in the garden, lush branches, beautiful posture, and resistant to pruning, easy to shape, widely used in color hedges, molded flower beds, shrub balls, color leaf small trees and other urban greening landscape, in China is mainly distributed in the Yangtze River basin south of the region, the maintenance of safflower sandalwood in the growth period also often suffers from the threat of disease, so that the ornamental value of the leaves is greatly discounted, there are mainly the following three!
1] Anthrax:
The main symptom: black spots appear on the leaves, because the flower color of the safflower stepwood is red, so the black spots are very conspicuous on the surface of the red leaves, resulting in the defoliation phenomenon of the safflower tree.
Occurrence law: The causative agent of anthrax is actinomycetes, which mainly occurs in May and June every year, and the pathogen will overwinter on the diseased leaves, which will cause harm in the following year.
Prevention and control points: pay attention to improving drainage conditions, increasing light and creating a good ventilation environment, and reduce the incidence of diseasesIn addition, once diseased leaves are found, they are treated immediately and destroyed in a centralized manner to prevent re-infectionFinally, in the early stage of the disease, take the pesticide in time**, and recommend Qi Lin Tianjun + Zhidazhuang spraying prevention and control!
2] Blight:
Harmful symptoms: blight is the most serious in the plant seedling stage, and the disease will accompany for life, mainly manifested in the root of the plant to harm, the bacterial infection will appear dark lesions, and will also show a state of flooding, and then cause the epidermis and xylem to peel off, thereby causing the death of the plant.
Prevention and control points: the soil can be changed in maintenance, planted with new soil, and the soil is disinfected, and the diseased plants are found to be destroyed in time to prevent infection with other plants, and finally the aboveground part can be sprayed with Qi Lin Tianjun + Sui Yu, and then combined with Qi Lin Sui Yuan + Jiacheng Irrigation Root Comprehensive Control.
3] Mosaic disease:
Hazard characteristics: mosaic disease is a disease caused by viruses, which leads to white and white leaves when the disease occurs, and leaves are deformed in severe cases, and the plants are short and weak, and mosaic viruses are mostly caused by aphids.
Key points of control: reducing the occurrence of aphids in conservation is more conducive to reducing the occurrence of safflower orange mosaic disease, and Qilin Baya can be sprayed in time to kill aphid damageIn addition, the selection of robust branches for cuttings is also the key to disease prevention, in any case, pay attention to the health management of the field, ** diseased plants, remove other hosts, reduce the source of infection, is the main control method.