mage973

I just received a new Australian Brush Cherry and a few leaves have brown spots, edges. It seems contagious to the other leaves. What is it and how do I treat it?
This my 2nd brush cherry. The first one I bought last year from a NY/NJ area online seller. It had the same exact spots (though more of them) which spread quickly and then the leaves all fell off the tree died after less than a week.
The roots are healthy. The tree looks as though it was just replanted in normal soil and a blob of moss living on sand/soil mixture was placed around the base. It was shipped Tuesday and I got it today.






thanks

Mage9973

Pup

Mage It looks like thrip, does it appear to be inside the leaf as a bulge?.
If it is it very tenacious the best way to get rid of it is to cut of the leaves that are affected.
The alternative is a systemic insecticide.
I hope this is of help.Pup

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G, day I live in western Australia I have been trying for the last 20+ years with some success to grow Bonsai. I am a perpetual learner and an advanced beginner

centaura

Its hard to see in the pic - but it might be scale. Or, if its just contained to one leaf - it might be damage to that leaf and nothing to worry about. But, it looked like there were a few "bumps" here and there, that would be scale.

-Centaura

mage973

Thank you for your responses!

I think the plant has 2 maybe 3 types of fungus.
Some spots are like a scab on the underside of the leaf but also penetrates the leaf. Applying rubbing alcohol - no change. I sprayed it with Schultz's insecticide anyway. Other leave now have spotchy discoloration (I'm guessing blight), edge browning and tiny black spots some of which are pink/red when held to a light (cherry spot fungus?)
I think the fungus was caused by the decorative rocks and a large lump of clay/moss combo that was plopped around the root ball. I removed the splotchy leaves, clay/moss blob (along with some earth worms) and the rocks then repotted. I then applied a fungicide (Daconil -active ingredient Chlorothalonil, by GardenTech) to the individual leaves affected by spots and such. This stuff is gelatinous, doesn't spray well and tends to kill new growth. I think it's intended for larger fruit trees.
Anyway, a few days later... no more "scabs/spots", the fungus (blight?) has slowed and the plant has shown a little new growth. Wish me luck!
I'm looking for a systemic fungicide Can someone recommend one?
Is anyone familiar with Neem oil extract as a fungicide?

Mage973

mage973

Sorry for the delay in response but I wanted to give the plant time to react to the suggestions and treatments (see my other post). I've only had it 4 days now.

It seems more like a scab but not inside the leaf. But since removing these I haven't seen it anymore. Just splotchy discoloration and tiny black/red spots (cherry spot fungus?)

I removed the affected leaves but more tiny spots and discoloration appeared on other leaves so I applied a fungicide with a q-tip to each affected leaf and made some other changes (soil, no rocks/clay/moss). The fungus has slowed considerably but is not entirely gone. So it's a wait and see situation.

As you suggested a systemic fungicide is probably in order. Locally I've only found Neem oil extract in a small quatity so I suppose I'll try that if the fungus doesn't stop spreading.

mage973

treebeard55

Mage, I think Ferti-Lome makes a systemic fungicide, but I can't remember the name. Your garden center may have to special-order it for you.

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Treebeard 55

The most important bonsai tool is your brain.

centaura

Neem oil is an insecticide - it works by smothering insects. So it wouldn't have any effect on a fungus problem. A lot of fungus problems can be cleared up by adding some air flow - getting a small fan running would be good.

If you had small 'scabs' that you were knocking off the undersides of the leaves, those were scale. If they were dry and crumbled off (don't worry about them)- they were dead. If they were moist and squished off, they were alive - and you should use a systemic of some kind - I reccomend Bayer advanced tree care. You can only get it in a big bottle, but its the best working one. It will not do anything for fungus. Fungus I would remove the effected leaves, add some airflow and you should be okay - you've already cleaned out the probably causes of the fungus, and done wonders for your tree since it sounds like it was inappropriately potted.

-Centaura