Infection approach of Diplodia sapinea, the causal agent of tip blight of Pinus tabulaeformis in China. Issue 5 (31st July 2019)

• Record Type: Journal Article
• Authors: Li, Xuewei; Liu, Bingxiang; Ren, Xiaojing; Cui, Jianzhou; Li, Huiping
• Editors: Scanu, Bruno
• Is Part Of: Forest pathology. Volume 49:Issue 5(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-07-31
• Subjects: Aphrophora flavipes -- Dioryctria splendidella -- Diplodia sapinea -- infection approach -- inoculation -- tip blight; Trees -- Diseases and pests -- Periodicals; Trees -- Effect of air pollution on -- Periodicals; Forests and forestry -- Environmental aspects -- Periodicals; 634.9
• DOI: 10.1111/efp.12544
• Languages: English
• ISSNs: 1437-4781

Abstract

Abstract: 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.