Control of brown rot of pineapple small fruit

Pineapple brown rot, also known as black heart disease, is a common disease in pineapple growing areas in the world, especially Cain pineapple. The disease mainly harms the mature fruit, symptoms: the appearance of the injured fruit is no different from the healthy fruit, but when cut open, you can see the symptoms. The infected fruit turns brown or forms black spots, and the susceptible tissue dries and hardens slightly, which generally does not easily extend to neighboring healthy tissue. Another symptom is that when the diseased fruit is cut open, it becomes dark and watery near the fruit axis, and then becomes black. Control method: spray Bordeaux solution every 2-3 weeks during flowering. At the same time, potassium fertilizer was applied to improve the drainage condition of orchard.