Author Topic: My nicest JBP  (Read 6514 times)

John Kirby

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Re: My nicest JBP
« Reply #15 on: September 10, 2009, 08:52 AM »
Hi Wayne,
I pulled the picture down and blew it up. I notice that a number of the old needles on the bottom appear to be browning, while the new needles are perfectly green. In your post you talk about leaving he tree in the green house, it looks like it might have been suffering from a fungal infection, one of the blights. I had a number of JBPs come out of the greenhouse this year and do the same thing (scared my wife to death that four shohin black pines suddenly turned brown. I sprayed everything with daconil and repeated in two weeks and while the trees still have old brown needles (I haven't pulled needles yet) we didn't lose any.

Again sorry for your loss,
John
 

bwaynef

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Re: My nicest JBP
« Reply #16 on: September 10, 2009, 10:46 AM »
(After much searching) I found the original pictures and looked at the needles at full resolution.  After seeing it, I do seem to remember some discoloration of needles, but (obviously) I wasn't worried about it.

Is daconil safe enough to use as a pretreatment?  I've taken a pretty chemical-agnostic approach and only treat when something seems dire.  As such, I've never treated pines, though there have been needles here and there that were discolored.

Actually, I have noticed a few discolored needles on some of my other pines.  I should probably treat those, ..and maybe bother to identify what each discoloration pattern indicates ...as well as the proper treatment thereof.

While we're at it, what is the proper (timing of?) treatment  for tip borers?  That's the only thing my pines are regularly afflicted with (that I noticed ...obviously).
 

John Kirby

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Re: My nicest JBP
« Reply #17 on: September 11, 2009, 07:37 AM »
Wayne,
if you didn't decandle the trees, you can pull the old needles now, then spray. If you decandled, then wait until november to pull old needles and spray now. Shoot tip moths: I use the Bayer product Merit, or one of the grey labels. Typically, I treat in march before warm up, and then the beginning of june. Should carry you through the season. Your weather is similar to ours, I would try that schedule.  The merit product we use are the soil granular treatment as it is a systemic. Don't use it on your flowering trees if you are concerned about your bees.

John
 

bwaynef

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Re: My nicest JBP
« Reply #18 on: September 11, 2009, 10:34 AM »
if you didn't decandle the trees, you can pull the old needles now, then spray. If you decandled, then wait until november to pull old needles and spray now.

Is that because the Daconil would affect the newly emerged needles from the decandling?
 

John Kirby

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Re: My nicest JBP
« Reply #19 on: September 11, 2009, 02:59 PM »
No, they may not be strong enough to support the tree alone. Daconil has very, very  low phytotocicity. I  either case spray now, remember I just got off a plane from India so my writing may be disjointed. John
 

bwaynef

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Re: My nicest JBP
« Reply #20 on: September 12, 2009, 10:26 AM »
I sprayed everything with daconil and repeated in two weeks and while the trees still have old brown needles (I haven't pulled needles yet) we didn't lose any.

Any care taken so as to not damage your mycorrhiza?
 

John Kirby

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Re: My nicest JBP
« Reply #21 on: September 12, 2009, 12:43 PM »
Nah, just spray hte foliage, it won't be a problem unless you drench them, even then I am not sure it would have any effect. John