In the early stages of the onset of Fusarium wilt, it is difficult to find that if the whole plant is affected and difficult to cure, prevention should be the main method. At the beginning of May in the northern areas, it is necessary to apply fungicides to the cracks in the bark in time, and injecting medicine (cavities with a diameter of 10 cm and a depth of 40 cm) near the canopy drip line can reduce or prevent the occurrence of blight.
Specific prevention measures: 1. Reduce the source of infection. Timely removal of diseased and diseased plants and centralized destruction. Disinfect the soil with 20% lime water.
2. Strengthen cultivation management. Soils are loosened regularly to increase soil aeration, and during the spring and autumn season, fertility is applied to Acacia to enhance disease resistance.
3. Chemical control. For the prevention of healthy plants in the affected area, spray 5 degrees lime sulfur when Albizia had not germinated; before the growing season did not appear symptoms, open the hole and water the systemic medicament, such as 50% thiophanate 500 times solution or 50% dexamethasone Ammonium 400 times watered the roots once a month for three or four consecutive times. At the same time, spraying or smearing plant stems, alternating medication, once every half a month, even spray 3 to 4 times, the effect is better. At the onset of the disease (June to August), spray 25% 23% solution of ammonia solution 250 to 300 times.