The deriving on the predictive equation of epidemic of poplar leaf rust disease caused by Melampsora magnusiana in nurseries of Huabei region [China]

Zheng Dapeng (Chinese Academy of Forestry Sciences, Beijing (China). Forestry Inst.)

Chih Wu Ping Li Hsueh Pao, 1989-05, Vol.9 (2) [Periódico revisado por pares]

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