Large Trident Progression Help

[Smoke]

The infection is not in the leaves, the infection is in the tree. The infection is manifest thru the leaves so that is what you see. Spraying solutions on already damaged leaves will not fix them, they are already ruined. You have to strip the tree, spray the tree, and spray the tree. and spray the tree weekly while it has no leaves. If your lucky when the new leaves come out, they will be fine. depending on your season, one may have to do this twice. I wouldn't want to, but thats what is needed. Then you have to keep it up. It's a year round chore. Much like clipping your fingernails or getting a haircut. Not something easy to fit into ones life style. But unless you find the style of Willie Nelsons hair appealing, you do it, and at 25.00 a pop.
If one wishes to keep maples, fungus will be an issue your entire career. Find something that works for you and keep at it. I do not bother spraying anything else in my collection, though some do get spray just because of wind travel. I do get needle cast on pines if I don't keep up though so if you switch over to black pines and you have issues with maples, you will have needle cast in your portfolio.

 

[Hawke84]

The infection is not in the leaves, the infection is in the tree. The infection is manifest thru the leaves so that is what you see. Spraying solutions on already damaged leaves will not fix them, they are already ruined. You have to strip the tree, spray the tree, and spray the tree. and spray the tree weekly while it has no leaves. If your lucky when the new leaves come out, they will be fine. depending on your season, one may have to do this twice. I wouldn't want to, but thats what is needed. Then you have to keep it up. It's a year round chore. Much like clipping your fingernails or getting a haircut. Not something easy to fit into ones life style. But unless you find the style of Willie Nelsons hair appealing, you do it, and at 25.00 a pop.
If one wishes to keep maples, fungus will be an issue your entire career. Find something that works for you and keep at it. I do not bother spraying anything else in my collection, though some do get spray just because of wind travel. I do get needle cast on pines if I don't keep up though so if you switch over to black pines and you have issues with maples, you will have needle cast in your portfolio.

thank you for the advice! yikes that is full on. so basically full defoliation - is the tree strong enough to handle that?

 

[Smoke]

Why you asking me?

 

[Hawke84]

Why you asking me?

trust your advice

 

[Smoke]

In my opinion I would do a complete defoliation. It looks strong enough to handle it. The point is, doing nothing is going to get worse.

 

[Smoke]

Keep in mind that trident maple, or palmatum leaves are flat. They come out a little flimsey but one can tell the difference between infected leaves and good leaves. Infected leaves are always cupped, will be distorted like bent gnarly old women's fingers, and get burnt edges out on the tips. the color will be nearly black. Keep in mind that the new years leaves, seen in mar to may, will be from fungus that developed possibly in Fall last year. It's not a case where all of a sudden fungus reared it's ugly head on Thursday in your garden. It's like I said you don't know there's fungus in there till the leaves come out, maybe 6 months later. Systemics may be good for preventing fungus on a daily basis, if it weren't for the plant developing immunity to the cure. Like all pests, fleas, ants, spiders, fungus, they all develop immunity over time so switching it up is best.

 

[NOZZLE HEAD]

thank you @Smoke & @NOZZLE HEAD , smoke your trees look fantastic!
So is this an issue i am going to be fighting with this tree for its life then? none of my other trees have any kind of fungal issues, and at the moment i dont do anything to treat them preventative, so im apprehensive about introducing it to my collection on the benches if it is going to bring in problems. I know fungus are everywhere so maybe i should be doing more. The new leaves are still getting the fungal browning, so its had another spray.
at the moment i am using Provanto Fungus Fighter Plus (trifloxystrobin & Tebuconazole )and FungusClear Ultra (triticonazole)

The fungus will likely persist for a number of years.

In crop systems where there is known disease pressure it is a standard practice to treat with a fungicide every two weeks while the plants are susceptible.

In “Seed to seed” onion production the crop is in the ground for a full year and very susceptible to diseases. The fields get treated with a rotation of fungicides every two weeks.

 

[Smoke]

The fungus will likely persist for a number of years.

In crop systems where there is known disease pressure it is a standard practice to treat with a fungicide every two weeks while the plants are susceptible.

In “Seed to seed” onion production the crop is in the ground for a full year and very susceptible to diseases. The fields get treated with a rotation of fungicides every two weeks.

Used to be known that Gilroy, was the garlic capital of the world....until a pathogen came in and ruined the soil for garlic. Now FRESNO is the garlic capital of the world. They don't even bother with garlic in Gilroy anymore.

 

[NOZZLE HEAD]

Used to be known that Gilroy, was the garlic capital of the world....until a pathogen came in and ruined the soil for garlic. Now FRESNO is the garlic capital of the world. They don't even bother with garlic in Gilroy anymore.

We’ve started growing garlic in Oregon because historically there has been very few acres of alliums.

Verticilluim showed up in our peppermint crops and have it really hard to grow fields used to last for 20 years and now they last about 4 on with a 20 year rotation.

In both garlic and mint nematodes are part of the problem too.

 

[Hawke84]

Hi all
update 6 weeks on. Defoliated, used Bordeaux mix on the naked branches and then fed well to aid recovery. Been using Provanto fungus fighter on the new leaves and so far its recovering well.
better colour to the leaves and not really any deformed leaves.
I dont think its completely gone as there are the odd leaves with black spots still. im removing these soon as i spot them so they dont become a hot-bed for spores.

 

[JoeR]

Hi all
update 6 weeks on. Defoliated, used Bordeaux mix on the naked branches and then fed well to aid recovery. Been using Provanto fungus fighter on the new leaves and so far its recovering well.
better colour to the leaves and not really any deformed leaves.
I dont think its completely gone as there are the odd leaves with black spots still. im removing these soon as i spot them so they dont become a hot-bed for spores.

View attachment 318050

Great nebari on that one. I wouldn't have thought defoliation would work on an already stressed tree but seems to have gone well for you

 

[Hawke84]

Great nebari on that one. I wouldn't have thought defoliation would work on an already stressed tree but seems to have gone well for you

yeah that was my initial worry about the energy level. i think if it was a regular maple it would have been too weak but tridents are pretty vicarious. was good advice from @Smoke
still a work in progress and i'll likely use lime sulphur over winter again and maybe Bordeaux mix before the buds swell in spring give it a good start to the year. i dont want to keep using proper toxix chemicals all the time though