Bonsai Study Group Forum

General Category => Evergreen Bonsai Discussion => Topic started by: base797 on June 08, 2014, 11:57 AM

Title: Oozing Engelmann
Post by: base797 on June 08, 2014, 11:57 AM
So, I collected this engelmann several years ago, 4 I think. When I found it the previous year I noticed white stains on the trunk. The following year when I was back at that spot, the plant seemed to be declining. I decided to collect it and attempt to restore its vigor in my garden where it would get lots of water, sun and fertilizer. The tree has reasonably recovered and has been growing well. My attention perhaps had lapsed due to the placement in the garden coupled with no plans for it except to let it grow for a while. I've been looking at it more this year and what I assumed was pitch (and still do I suppose), is certainly covering a larger areas on the trunk. Just figured I'd see if anyone has some insight and what if anything can or should be done. Thanks in advance.
Title: Re: Oozing Engelmann
Post by: Herman on June 09, 2014, 03:06 AM
Hi Patric,

IDK but it sounds like it could be a borer of some kind? that sap must be oozing from some kind of wound

kind regards
Title: Re: Oozing Engelmann
Post by: base797 on June 09, 2014, 03:52 PM
Thanks for your reply and thoughts. That's what I was kinda thinking and afraid of. Have you (or anyone) had experience dealing with those critters? I did treat it this year with a systemic pesticide, but perhaps there is more that can be done? Poke around in there perhaps?

I appreciate you taking the time.
Keep well,
Title: Re: Oozing Engelmann
Post by: Herman on June 10, 2014, 01:33 AM
I can only speculate Patrik , as I don't know what kind of borer it can be, in south Africa we only get termites that bore, and if they get to a bonsai it's usually game over once you notice the bark lifting up. I dont want to give you a fright though...

Here's what I would try:

Clean up the sap to try and fing some holes, get a syringe and try and get some contact spray insecticide into those tunnels. I don't know how the tree will react to this though. It may be the worst thing to do for the tree. Maybe someone else with experience in handling borers can chime in

Kind regards
Title: Re: Oozing Engelmann
Post by: Sorce on June 10, 2014, 04:18 AM
Very nice tree Patrik.

I don't know how... But I hope you win the battle.

That trunk is fantasticky!

Title: Re: Oozing Engelmann
Post by: bwaynef on June 10, 2014, 08:52 AM
I'd consider dusting the tree (and especially any holes you find) with Bt.
Title: Re: Oozing Engelmann
Post by: Chrisl on June 10, 2014, 10:47 AM
I was thinking borer too.  I've been told you have to manually remove them, not sure how other than digging it out?  I'll be watching this thread with interest.  Good Luck as it's a really nice tree!
Title: Re: Oozing Engelmann
Post by: base797 on June 10, 2014, 01:48 PM
Okay, thank you all for your thoughts. I had the guys from New England Bonsai Gardens here yesterday buying a bunch of collected material (enjoy Massachusetts and environs) and I asked Jung ( hope I got that right) if he thought it was a borer? He made a very valid and obvious point, if I have had the tree for 5 years, the bug would be dead a long time ago. At the time I didn't think to ask about that original bug laying eggs and cycling very year. Anyone know if borers act in that manner? Bore, lay eggs, die and repeat? It seems reasonable, but unsure. Regardless, he mentioned (I think, he was struggling for the English word) using epoxy to seal it.

Thanks Source.

Thanks again.