Species Specific > White Pine Bonsai Discussion

JWP....Help!

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Bonsaiguru:
This is a white pine that was recently repotted. It was imported in 2008. I noticed the new growth from the top was going dead. I am sure I lost the top, but I can see that the middle and bottom is pushing new growth (a relief!). My question is what cause the top growth to died? I was thinking maybe root rot, or some type of fungus? When I noticed the die back, I remove the cakes and have not fertilizer. I just recently water it with seaweed and B! Vitamin solution.

I figure if I lost the top I have a new apex right below the overhanging branch from the top. I can also make the dead branches into Jin and shari

T-Town Bonsai:
My guess would be your zone, I lived in 7 and it was too hot and dry for white pines.  Don't think mine even lasted a year in OKC. 

Bonsaiguru:
I am in 9a zone (SF Eastbay) It does it hot, but not that hot. I have kept JWP with no problems out here, but I also have lost some few. I think it is fungus.

MatsuBonsai:
My first thought would be fungus too, but it's difficult to tell from the photo.  What leads you to believe it's fungus?  Any signs, etc?  What are your growing conditions, soil, watering habits?

Bonsaiguru:
I know JWP like to be on the dryer side, so I usually allow it to dry out a bit before watering. Though it has been grafter on JBP, I still think it prefers to dry out a bit before watering.

One of my problems watering, is knowing when. For example, I have check the soil with chopsticks and sometimes my finger, at times it is hard to tell if it needs watering. Lately, I go but the weight of it. As most of my Pines are in Plastic training pot I can see the difference in weight when it drys out. For instance, when picking up the pot, as it drys out, the bottom stays heavy and the top lighter, when it needs watering the bottom tends to balance out with the top. Again, I don't if the method would work for the long run.

When checking the soil I try to get to an inch and see if it needs watering, but even with this method it can be tricky (for me). I guess that is why they call it the "Art of Watering"....

I thought it was fungus because when I  remove the died needles they were dried out even the new growth from the top were dry out not burned.

I was told on another forum to use Capton fungicide once or twice a year as a precaution. Don't if anyone here has used it in the matter.

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