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Infection approach of Diplodia sapinea , the causal agent of tip blight of Pinus tabulaeformis in China
Author(s) -
Li Xuewei,
Liu Bingxiang,
Ren Xiaojing,
Cui Jianzhou,
Li Huiping
Publication year - 2019
Publication title -
forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 1437-4781
DOI - 10.1111/efp.12544
Subject(s) - biology , pinus tabulaeformis , blight , pathogen , lepidoptera genitalia , botany , inoculation , pyralidae , spore , horticulture , microbiology and biotechnology
To clarify the infection approach of Diplodia sapinea , a pathogen that causes tip blight of Pinus tabulaeformis , the infection process of the pathogen in needles was observed using scanning electron microscopy ( SEM ). In addition, the disease incidence on branches damaged by Aphrophora flavipes (Hemiptera: Cercopidae) and Dioryctria splendidella (Lepidoptera: Pyralidae) in the forest was also investigated. Then, branches and needles of P. tabulaeformis were inoculated using the D. sapinea spore suspension under indoor and field conditions. The results showed that the damage caused by A. flavipes could aggravate the occurrence of tip blight of P. tabulaeformis to some extent. Moreover, the pathogen could also penetrate 1‐, 2‐ and 3‐year‐old pine needles through stomata in the field. The pathogen infected the 1‐year‐old branches first and then gradually spread to 2‐ and 3‐year‐old branches.