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|Table of Contents|

松针褐斑(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2002年01期
Page:
27-31
Column:
研究论文
publishdate:
1900-01-01

Article Info:/Info

Title:
Studies on the Bioassay of Toxins from Lecanosticta acicola Causing Brown Spot Needle Blight of Pines
Article ID:
1000-2006(2002)01-0027-05
Author(s):
YE Jian renYANG BinBAO Hong
Nanjing Forestry University,Nanjing 210037,China
Keywords:
Pine disease Lecanosticta acicola Fungi toxinsBrown spot needle blight of pine
Classification number :
S763.1
DOI:
10.3969/j.jssn.1000-2006.2002.01.007
Document Code:
A
Abstract:
Brown spot needle blight of pines is one of important pine diseases,which is caused by Lecanosticta acicola .It is confirmed that the fungi can produce toxic substances in its culture filtrate.The toxic substances ware called LA toxins.LA toxins could not only poison pine needles also the leaves of weeds.Various bioassay materials were treated with crude LA toxin to select sensitive material for the future study.The results indicated that seedlings and young needles of sensitive host(slash pine,lobollolly pine)were selected as bioassay materials for their sensitivities and reaction of the typical necrotic and yellow bands on needles.Such symptoms were similar to the symptoms of natural infection in the field and were different from other injuries.Old needles of pines and weed leaves were not sensitive to LA toxins.Compared with other two bioassay methods(soaking and smearing),the acupuncturing bioassay is the most suitable method because it just needs less toxin and can cause the evident symptom rapidly.

References

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Last Update: 1900-01-01