Study on the Damage of Rules of Pyslla chinensis

doi:10.3321/j.issn:1000-7091.2002.z1.004

Abstract

Abstract: Studies were conducted for years.Results showed that the damage of the Pyslla chinensis to the pear trees included direct and indirect damage.The latter was more sever than the former.The secretion of Pyslla chinensis was good culture medium for Alternaria alternata and Cladosporium spp.Mildew began to grow,develop and produce toxic substance on the leaves,branches and fruits with the secretion and its residue when the relative humidity of the air reached over 60%.Under the exist of the mildew and the toxic substance,the pear trees were damaged by the Pyslla chinensis, which resulted in the damage spots on the leaves,the early fruit drooping,damage spots on the fruits and fruit rotting.

Key words: Pyslla chinensis, Secretion, Mildew, Relative humidity, Direct and indirect damage

CLC Number:

S436.612

ZHANG Cui-tuan, XU Guo-liang, WANG Peng, ZHENG Xiao-lian, ZHANG Jun-e, ZHANG Ying-ran. Study on the Damage of Rules of Pyslla chinensis[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2002, 17(S1): 17-22. doi: 10.3321/j.issn:1000-7091.2002.z1.004.

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