honey suckle

honey suckle


 夫婦で庭づくりを福岡の郊外で2003年に始めました. 赤土むきだしの斜面にまず階段や園路をつくって芝をはり、果樹やバラ、ハーブなどを植えました.



Roses' powerful enemy has appeared last week, and its attack is continuing now.


This is the first sign of being attacked which I found in Rosa 'Mary Rose' last Saturday.  A new shoot suddenly wilts while others are vigorous.


Peeling skin of its stem revealed that the enemy incised the stem in the shape of flying seagull.  The skin looks normal and I didn't know that it is a deed of an insect when I saw it for the first time.  I examined about it and it became clear that the pest is a rose-borer Neosyrista similis.


Once I saw through a stem using a pocket torch and a magnifying glass, I found something oval just close to the seagull-shaped incision.  Using a sewing needle, I found a very small oval egg.


This is a wilted shoot of Japanese wild rose 'Rosa multiflora' found last Saturday in our garden.  Its leaves is becoming dry, therefore, it seems that several days have passed since the attack of the enemy.  I cut the stem and found a small caterpillar. 


There are many Q and A on internet about rose borers, however, I couldn't find scientific information about it.  But I found the scientific paper written by a Chinese student of Kyushu University.  It was reported in 1936, in Japanese with an English abstract.  The paper includes meticulous observations about rose borers and is very useful for gardeners growing roses.  Photos below are front page and English abstract of the paper.  You can read the full text here.


にほんブログ村 花・園芸ブログ ガーデニングへ


  1. I hope you are successful in dealing with this bug and your other beautiful roses do not suffer the same fate!

    1. Yesterday my wife captured it at last! One female adult is said to attack more than ten shoots, so she saved more than ten rose flowers. Good job!


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