Yellowing

[treeman]

Sorry to get a bit riled up about the topic treeman. I think the semantics in our responses and the way I was interpreting your responses may have gotten a tad mixed up, and I tend to get a bit defensive when it comes to matters of science and sometimes go on a tangent.

I completely agree with what you've said about fungal infection caused by root damage as a definite cause of black tips in some instances. But also in my experience I've observed that some black pines will develop black/brown tips by natural aging as well. Particularly in 2 to 3 year old needles, and that rather than drop when they've turned brown, they'll do so when they've completely yellowed instead.

All good even. I'm with you when it comes to science. It's a pitty that all the religious crazies in the world didn't pay more attention to it rather than the bulls**t they do waste time on...but that's another story
I spent a couple of years at hort school. The only thing I really remember from it was where to get the coffee.
I found that most of what you learn comes later from private study and experience...

[Mojo Moyogi]

I'm not convinced either way regarding arguments of old needles/disease/overwatering.

However JBP in a nursery pot of that size, in 8hrs of full sun in Melbourne, in summer on a 30+ degree day, will be fine with a single morning watering of the root ball to complete saturation. This is provided that the surface roots are adequately covered with soil or better still mulch, that the tree is not ridiculously root bound and that the tree is not growing in 20mm screenings or something silly like that.

So my advice, water deep, water once, if it is really hot and windy, inspect in the evening and water again only if you are absolutely sure the tree is too dry and avoid wetting the foliage at every watering.

Cheers,
Mojo

[treeman]

I agree whole heartedly with all your sentiments Mojo. Except the leaf watering part which I do every time I water and on real hot windy days up to 8 times a day.

[Mojo Moyogi]

Hi Treeman, I meant don't foliage water every time you water, but on hot windy days, absolutely drench the needles.

Do you have a mist irrigation rig to do the foliar watering for you 8 times a day or are you doing that manually. When I was living in suburbia up until 2007, I had a misting setup for my junipers, purely for foliar spray, it worked a treat and the trees loved it. That was back when I had only 30 or so Junipers, since moving to the mountains and moving 4 times in 9 years, I haven't installed a similar system.

Cheers,
Mojo

[Mojo Moyogi]

and I tend to get a bit defensive when it comes to matters of science

Hi Evan,
Science would be nothing if it were not for conflicting opinion, robust discussion, counter arguments and copious amounts of egg on face.
There is more than enough "sofltly, softly" folks on this forum and everywhere else in the world to balance out the "dangerous minds".
Don't be afraid to push hard if you believe in what you are saying, but never shirk the blame if you are wrong.

You can't hope to gain respect if you don't give it where it is due.

Cheers,
Mojo

[treeman]

Do you have mist irrigation rig to do the foliar watering for you 8 times a day or are you doing that manually.

I'm afraid it's all by hand for me. Overhead mist is good for raising the humidity but I don't trust it for actual watering. Some get too much, some not enough....Mind you I only spray when the temp is in the high 30's and the humidity is around 10% or lower. In other words, during bushfire weather.

[Pup]

Do you have mist irrigation rig to do the foliar watering for you 8 times a day or are you doing that manually.

I'm afraid it's all by hand for me. Overhead mist is good for raising the humidity but I don't trust it for actual watering. Some get too much, some not enough....Mind you I only spray when the temp is in the high 30's and the humidity is around 10% or lower. In other words, during bushfire weather.

You mean just like a spring day in WA Mike

[Webos]

A few years back I had very similar issues in the months after heavily spading around a black pine I had in the ground. It lasted about a year and a half and now the tree is green and back to normal. Although I'm not saying that this is the problem in this particular case, I'm pretty sure Black pine root problems can cause yellowing needle tips.

Adam

[Lane]

and I tend to get a bit defensive when it comes to matters of science

Hi Evan,
Science would be nothing if it were not for conflicting opinion, robust discussion, counter arguments and copious amounts of egg on face.
There is more than enough "sofltly, softly" folks on this forum and everywhere else in the world to balance out the "dangerous minds".
Don't be afraid to push hard if you believe in what you are saying, but never shirk the blame if you are wrong.

You can't hope to gain respect if you don't give it where it is due.

Cheers,
Mojo

Very well said!