Abstract:

In order to verify the prevention and control effects of two different kinds of citrus huanglongbing integrated control theories guidance on citrus psyllid and huanglongbing. large-scale comparative test was carried out in 2006-2008 in Liangfeng farms of Guilin. The results showed that citrus psylla was never been observed in citrus Huanglongbing integrated preventing areas which focus on controlling psylla. Three-year cumulative incidence rate is 1.71% and the annual average incidence rate is 0.57% in 8-year-old disease-free seedlings planting area, reduced by 19.41% and 6.47% to comparative areas respectively while three-year cumulative incidence rate is 1.35% and the annual average incidence rate is 0.45% in 6-year-old conventional grafting seedling planting area, respectively, reduced by 8.31% and 2.77% to the contrast area respectively. Citrus psyllid was observed in traditional huanglongbing integrated control areas (contrast area) every year. 3-year cumulative huanglongbing strain rate is as high as 21.12% and the average annual 7.04% in 8-year-old disease-free seedlings planting area. Three-year cumulative strain rate reached by 9.66%, with an annual 3.22% in 6-year-old conventional grafting seedling planting area .