Preliminary Study on Selection Mechanism of Empoasca onukii on Tea Varieties in Fujian Province

WANG Wei; WU Manrong; ZHANG Sixiao; JIN Shan; YE Naixing

doi:10.15933/j.cnki.1004-3268.2016.04.018

Abstract：From the perspective of variety resistance, investigation on population density of Empoasca onukii,botany morphology and volatiles of different tea varieties were carried out by using Smart Nose and other methods,to figure out selection mechanism of Empoasca onukii on different tea varieties in Fujian province. The results showed that the population density of Empoasca onukii on Rougui was the highest and on Tieguanyin was relatively low. New shoots of Fuyun 6,Fudingdabai and Rougui were yellowish green,those of Huangdan were light green, of Maoxie and Benshan were dark green, and of Tieguanyin were purple-green. The volatile characteristics of healthy shoots of seven tea varieties were divided into three groups, Tieguanyin, Fuyun 6, Maoxie and Fudingdabai were close to each other, belonging to a group,Rougui and Benshan belonged to a group, Huangdan was far from the two groups and become a different group. However, the characteristic of volatile changed when the leaves were damaged by Empoasca onukii,except that Rougui and Maoxie were similar,the induced volatiles of other varieties were different from each other. Thus the two tea varieties Rougui and Tieguanyin can be the materials for deeper study on resistance mechanism to Empoasca onukii. We can infer that Empoasca onukii tend to choose the varieties with yellowish green buds and leaves; the volatiles characteristic of varieties in healthy and damaged shoots may be an important clue in selection of host tea variety for Empoasca onukii.