Intensity and patterns of leaf area eaten of Lithocarpus glaber by insects,at Tiantong Forest Park,Zhejiang

Abstract

Abstract: Intensity and patterns of leaf area eaten of Lithocarpus glaber by insects were studied in the evergreen broad-leaved forest at Tiantong Forest Park of Zhejiang Province,China.The results showed that the patterns of leaf area eaten were diverse with their frequencies greatly varied.Totally 15 patterns of leaf area eaten by insects were identified,among which the frequencies of the top and edge defoliations were more than 30%,the cutting leaf,successive pinhole and big perforation 10%～30%,the small perforation,lower epidermis defoliation,middle vein defoliation and bloth-shaped mine 1.5%～6.4%,and the upper epidermis defoliation,rugate defoliation,excavating defoliation,spiral mine slender defoliation and striped defoliation less than 1%.The intensity of leaf damage depended on the pattern of leaf area eaten and its frequency.Because of the high frequencies and serous damage of leaves,the top defoliation,edge defoliation and cutting leaf were the most important types to damaged leaves of L.galber.There was significant positive correlation between successive pinhole and cutting leaf,while significant negative correlation between successive pinhole and lower epidermis defoliation,cutting leaf and small perforation,which indicated the difference of eating pattern of different insects in space and time. There was 64% of leaves eaten and the rate of leaf damage was 13.6%.

Key words: Water deficit, Maize, Hydraulic conductivity, Anatomic structure

CLC Number:

Q948.12

JIANG Hong, CAI Yongli, LI Ka, WANG Hong, WANG Liang. Intensity and patterns of leaf area eaten of Lithocarpus glaber by insects,at Tiantong Forest Park,Zhejiang[J]. cje, 2005, (9): 989-993.

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