柑桔黄龙病综合防治的理论与实践

柑桔黄龙病是世界性的毁灭性病害，除原有的亚洲、非洲外，美国、巴西也已发现此病和其传播媒介－柑桔木虱。根据柑桔木虱是黄龙病唯一自然传播媒介和广西柑桔主产区无法实施隔离种植的特点以及柑桔黄龙病已成为广西柑桔发展最大障碍的实际和柑桔生产现状，提出在黄龙病区建立以柑桔黄龙病为第一重要病害，柑桔木虱为第一重要害虫的柑桔病虫害综合防治体系，实施以控制柑桔木虱为重点的柑桔黄龙病综合防治措施。3年的大面积田间验证试验结果表明，验证区累计发病率为0.72%，对照Ⅰ区达9.42%，对照Ⅱ区达7.14%。

A Theory of Integrated Control of Huanglongbing and It''''s Application

Huanglongbing is a cosmopolitan and destructive disease, besides its distribution in Asia and Africa，now the disease and its vector –citrus psylla have been found in Brazil and America as well. Due to citrus psylla is the only vector of huanglongbing and disease-free seedlings cannot be cultured in isolation, huanglongbing has become the biggest obstacle in the development of citrus industry in Guangxi. A new theory of integrated control of huanglongbing has been proposed and applied for three years in the largest citrus planting area. The new theory described that huanglongbing is the most destructive disease and citrus psylla is the most destructive pest. Integrated control citrus psylla is the most effective means in the integrated control system of huanglongbing in the diseased area. The new theory is applied in the test area for three years, the total incidence of huanglongbing in the test area was 0.74% , less 8.68% than the total incidence (9.42%)in the contrastⅠ, less 6.40% than the total incidence(7.14%) in the contrastⅡ.