Safflower disease is more common. Anthracnose, rust, blight and sclerotinia are important. They are described as follows: (1) Anthrax. Occurs in May and June, and damages stems, leaves and buds. The lesions on the stems are spindle-shaped, reddish-brown or orange-yellow, and the lesions on the leaves are round, slightly retracted, shrink, and the diseased plants are withered and rotted in later stages. Control methods: selection of disease-resistant safflower; selection of well-drained Gaoao block planting; rotation, not heavy mash; 30% Philippine wolfberry, seed concentration by 1% seed dressing; early onset spray 1:1:120 Bordeaux fluid or 65% 500-600 times that of Zeisin, spray once every 7-10 days for 2-3 times. (2) Rust. High humidity is conducive to the occurrence and development of rust, and continuous cropping is the main cause of rust spores infecting the roots and roots. The spores spread with the wind and invade the cotyledons, leaves and bracts of safflower, forming chestnut-brown, small herpes-like lesions. In the seedling stage, dense yellow patches appeared on the hypocotyls and roots of the cotyledon, and then a chestnut-colored circular rust device appeared on the edges of the macula, followed by a patchy, mat-like formation. The main roots formed brown lumps of teliospores, which were in the sick. Overwintering on the plant became the source of infestation in the early next year and infested the leaves in late spring and early summer when the temperature was low or moderate and the humidity was high. Control methods: choose topography or high ridge planting; implement 2-3 years of rotation; pay attention to the clear garden, treatment of diseased plants; seeds with 0.4% of the seed amount of 15% triadimefon; spray at the beginning of the onset of 15% Triadimefon 500 times 1-2 times; increase phosphorus and potash fertilizer, promote plant robustness, improve resistance to disease. (3) Wilt disease. The disease is generally endemic in the south. Due to transmission of soil or seed bacteria, the base and roots of the diseased plant stem are dark brown, and orange-red sticky substances are secreted on the surface of the stem base. This is a conidial pile of pathogenic bacteria, and the roots and stems are successively rotted. withered. Control methods: Strictly implement crop rotation, not heavy rain; timely drainage after rain; promptly remove the diseased plants, disinfect the diseased point with lime, remove the litter and weeds in the field, reduce the source of overwintering bacteria, use 1:1:120 Bordeaux Liquid or 50% carbendazim 500-600 times liquid irrigate root, select disease-free strains to retain seed. (4) Sclerotinia. The disease often occurs in the south, and there is more rain in the spring and early summer, which can lead to the occurrence of this disease. The culprit plants have yellow leaves and branches, and the black murine urea nucleus appears in the root or stem marrow. The control method is the same as wilt disease.