Abstract:

The objective of this study is to understand the correlation between the chlorophyll contents in new shoots from different tea germplasms and the selectivity of Aleurocanthus spiniferus, and provide theoretical basis for early identification of resistant breeding. In this experiment, the acetone spectrophotometric method was employed to detect the chlorophyll contents in new shoots from 9 tea germplasms, and the correlation between the chlorophyll contents in new shoots from different tea germplasms and the selectivity of A. spiniferus was analyzed. The results showed that there was significant difference on contents of chlorophyll in new shoots from 9 tea Germplasms(F=4.323，P＜0.05). The chlorophyll contents from ‘Dangui’ (3.72 mg/g), ‘U3’ (3.49 mg/g), ‘Tieguanyin’ (2.85 mg/g), ‘U510’ (2.74mg/g),’Yulong’ (2.69 mg/g) and ‘Maoxie’ (2.61 mg/g) were much higher than that of ‘Huangdan’ (1.83 mg/g), ‘Fuyun No.10’ (1.84 mg/g), ‘Fuyun No.6’ (1.85 mg/g). The contents of chlorophyll or chlorophyll-a or chlorophyll-b in new shoots from 9 tea germplasms had no significant negative correlation to the oviposition number of A. spiniferus in unit area (P＞0.05), but had significant or nearly significant negative correlation to the generational survival rate of A. spiniferus (P＜0.05). In short, the result suggested that higher contents of chlorophyll or chlorophyll-a or chlorophyll-b had relatively higher resistance to A. spiniferus.