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A PRELIMINARY MEASUREMENT ON VIRULENCE OF BURSAPHELENCHUS XYLOPHILUS BY SEVERAL BIOLOGICAL CHEMICALS

Zhu Xun (Hunan Forestry Technical College,Hengyang 421005)  
According to the measurement of the virulence of Bursapheletichus xylophilus in the laboratory by the several biological chemicals, its result showes that 6102 and Aschersonia sp. have strong ability to control the nematode i. e. Bursaphelenchus xylophilus.
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