In production, reduce the incidence of bitter pit disease apple fruit pest control, - is the soil in sufficient effective calcium, calcium nitrate applied 25 kg / acre or lime soil by early spring 100 to 150 kg / mu, increasing the number of calcium . Through organic fertilizer, Straw and other organic matter to improve the soil and increase the effectiveness of calcium. Second, the root outside chasing calcium, spend three to five after Zhou Shuren body absorbing calcium peak, effective calcium fertilizer spraying apple, for example, 0.3% calcium nitrate how to treat high-Norwegian apple bitter pit disease, higher concentrations of amino acids calcium. Also prevent soil suddenly dry suddenly wet, affecting the normal absorption of calcium, control the size of the like. Calcium is a component of the cell wall, pectin and pectin form calcium, structural stability of the cell wall, calcium deficiency will affect the formation of cell walls and the spindle, so that cell division can not be normal; calcium involved in the metabolism of nitrogen, nitrate reduction you need to be more than calcium ammonium and amide nitrogen, it can lead to excessive nitrate bitter pit disease; calcium on protein synthesis and transport of carbohydrates, as well as organic acids in plants and so on play a significant role; calcium acts as a second messenger in cell signaling; calcium and calcium combined with a variety of plants to regulate cell function. How apple bitter pit disease prevention | Modern Fruit | apples provided by the Institute of Modern Yantai fruit industry science. Yantai Institute of Modern Fruit Industry Science (www.xiandaiguoye.com) (www.ytoumaisi.com) Shandong Yantai, other leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer demand. In modern fruit industry leadership with the staff warmly welcome all inquiries negotiations to create the modern fruit industry a better future.