Tree and Forest Health
Online ISSN : 2189-7204
Print ISSN : 1344-0268
ISSN-L : 1344-0268
Volume 19 , Issue 3
Showing 1-14 articles out of 14 articles from the selected issue
Articles
  • Takashi Inuma, Masanori Kansako, Chiharu Nakashima
    2015 Volume 19 Issue 3 Pages 133-138
    Published: July 31, 2015
    Released: August 27, 2018
    JOURNALS FREE ACCESS

    In August 2012, leaf blight and shoot dieback with many conidiomata on Eucalyptus pulverulenta were observed on eucalypti trees in Wakayama Prefecture. The monoconidial isolate was established by a conidium formed in the conidiomata on the leaf lesion. According to the results of inoculating intact leaves of E. pulverulenta and E. gunnii with conidial suspension prepared from the isolate, the same symptoms were developed in these leaves and the fungus was re-isolated from symptomatic tissues. So its pathogenicity was confirmed. Based on the morphological characters and the nucleotide sequences of rDNA ITS regions and β-tubulin gene, the causal fungus was identified as Pseudoplagiostoma eucalypti. This isolate grew at 15-35°C, with optimal growth at 25-30°C.

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  • Tooru Taniwaki, Masaaki Ino, Hideto Tsuruta, Hiroshi Saito, Keiji Aiha ...
    2015 Volume 19 Issue 3 Pages 139-148
    Published: July 31, 2015
    Released: August 27, 2018
    JOURNALS FREE ACCESS

    To clarify the control effect of chemical injection in Fagineura crenativora, dinotefuran with high penetration and migration in plants was injected into trunks of young beech trees growing in Atsugi, Kanagawa Prefecture and Shiojiri, Nagano Prefecture before bud break, and insect mortality was evaluated. Eggs oviposited on leaves mostly died with blackening. In addition, all of the first instar larvae hatched from some eggs died, although oviposition of eggs by female adults was not prevented. Among third and fourth instar larvae reared for 3 days in growth chambers with leaves of chemically injected trees, all of the third instar larvae died, fourth instar larvae mostly died or became paralyzed, and some larvae reached the last instar without feeding. No visible injury such as leaf discoloration, closure inhibition of injection holes, or extreme expansion of wood discoloration was observed. The method was concluded to offer high control of Fagineura crenativora and appeared applicable to mature local trees.

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Case Report
Series: The management for trees in the botanical garden and park
Short Communications in the 19th Annual Meeting
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