Aiming at the complicated causes of areca yellowing disaster, a synergistic model of biological control, physical and chemical control, ecological control, pesticide reduction and synergism was preliminarily constructed by combining targeted control with comprehensive prevention and control. The synergistic application of different types of special fertilizers, synergists and water-retaining agents was carried out to increase yield, reduce yellowing and improve quality and build the "water-soil-fertilizer-medicine-tree" model. In Tunchang, Wanning, Ding'an, Baoting county in Hainan Province, 5 demonstration gardens for prevention and control were established, covering an area of 800 acres. No new disease centers were found in light disease gardens, and the yellowing rate was controlled within 10%. Diseased plants in medium disease gardens emerged green leaves and began to rejuvenate as a whole. Diseases in serious disease Gardens stopped expanding, and diseased plants emerged new leaves, and the demonstration sites turn for grew well as a whole.　

　　                                     Major Science and Technology Project of Areca Pests and Diseases Initiation Meeting in Hainan Province