Brown spots appearing on some of the leaves

[Mikenet82]

I was wondering what may be causing some of the leaves to look like this....

https://www.dropbox.com/s/y2d88eo8ykklwsx/15056277_1357136124374622_3828472219908608736_n.jpg?dl=0
https://www.dropbox.com/s/o09cf01j8lk7z2o/17201022_1357136071041294_2845244219994538854_n.jpg?dl=0
https://www.dropbox.com/s/o4hzgbofltwzfjq/17098666_1357136014374633_2264836979301179927_n.jpg?dl=0
https://www.dropbox.com/s/w1plfsprtkx4bgt/17021952_1353336308087937_5329803396670874614_n.jpg?dl=0
https://www.dropbox.com/s/upv76n80yqiqkwr/16999053_1353336394754595_107716142967891958_n.jpg?dl=0

As you can see from the last two pics, the plant looks healthy overall but I've found when a serious problem starts there are usually indicators beforehand, Only a few leaves have these brown spots, it appears to be the leaves that are older and further down on the tree. If you look at the tips of the leaves you can also see a little brown on the edges.

Does anyone know what is this typically a symptom of?

Thanks in advance for any tips.

 

[Pablo]

I was wondering what may be causing some of the leaves to look like this....

https://www.dropbox.com/s/y2d88eo8ykklwsx/15056277_1357136124374622_3828472219908608736_n.jpg?dl=0
https://www.dropbox.com/s/o09cf01j8lk7z2o/17201022_1357136071041294_2845244219994538854_n.jpg?dl=0
https://www.dropbox.com/s/o4hzgbofltwzfjq/17098666_1357136014374633_2264836979301179927_n.jpg?dl=0
https://www.dropbox.com/s/w1plfsprtkx4bgt/17021952_1353336308087937_5329803396670874614_n.jpg?dl=0
https://www.dropbox.com/s/upv76n80yqiqkwr/16999053_1353336394754595_107716142967891958_n.jpg?dl=0

As you can see from the last two pics, the plant looks healthy overall but I've found when a serious problem starts there are usually indicators beforehand, Only a few leaves have these brown spots, it appears to be the leaves that are older and further down on the tree. If you look at the tips of the leaves you can also see a little brown on the edges.

Does anyone know what is this typically a symptom of?

Thanks in advance for any tips.

My mango sapling was going through some change this winter similar to your plant. The internet told me it was either, getting too much/not enough water, dealing with diseases/pest, or being fertilized too much. I had no idea what was happening so I panicked. I sprayed it with pesticide to get rid of any disease/pest, and then I gave it a really heavy watering to make sure to get rid of any excess fertilizer and it was well watered. Turns out I forgot mango trees go dormant in winter and it was just reacting to the cold. Best thing you can do is do what I did just to make sure al of thel possible problems are dealt with

Have you changed anything regarding to how you care for the plant? Fertilized it lately? Moved it around? Maybe gave it too much water? I know you have been having problems with how much water you need to give it. Maybe its getting too much humidity?

 

[Chuck]

From what the pictures show it looks to me as if you are watering too often and have acquired a light fungus. I would spray it with either a copper based fungicide, hydrogen peroxide or baking soda and not water until IT IS NEEDED. Let the plant tell you it is thirsty before your force feed it water. If it wilts in the early AM it is thirsty. If not it isn't.

 

[Mikenet82]

Chuck, I got ya.

I sprayed some hydrogen peroxide on the soil, (diluted to the proper ratio) to get rid of the fungus that was visible on the soil. I figured that since it already has it on the soil and has probably absorbed some into the plant itself that I should wait a bit before spraying the leaves. I could perhaps use a cotton ball with a diluted mixture of HP, I'm just not sure if more gets on the soil if it'll be too much, plus I think a bit got on the leaves before. I think I'll spray the leaves tomorrow since that'll make 4 days since I sprayed last. (I'm probably being over cautious) Question, nobody sprays straight HP on leaves, do they?

I'm trying with letting it dry out some more, I think it is a bit but it takes a while given the humid environment it's in. It wilts when it doesn't have a high humidity environment, yet to dry it out fast I'd need to lower it so it's tricky for sure. Hrm

Pablo, it has undergone some changes but the spots were appearing just before I changed things up. At the time it was in a smaller pot but towards the end, it stopped growing and was wilting more often. I figured it was root bound so I repotted it in freshly fertilized soil and it started growing again. Odd thing was that it wasn't root bound. Some of the roots had reached the bottom, but barely. The roots weren't swirling around the pot.

I'm still not positive about what caused those problems but it's doing much better in the fresh soil and new pot. Other than that the conditions are the same as before. Biggest problem that's continued was the molding or fungus spreading that was visible on the soil a few days ago, and the brown spots have gotten just a tad worse on the leaves that were already spotting. It's odd to me that only some of the lower and older leaves have developed this problem.

Would y'all think that this is a sign that the problem has been a fungus that hasn't spread all the way up the tree?

 

[Chuck]

I have sprayed peroxide 50/50 and no harm came but I don't know about 100%. Spray the leaves and the soil with the diluted mix every couple of days. Fungus is a strange thing. It takes many forms and does not act as one would expect. Being in such a humid environment I am afraid you will keep on having fungal problems but just keep spraying. You might have to resort to a copper based fungicide

 

[Mikenet82]

I have sprayed peroxide 50/50 and no harm came but I don't know about 100%. Spray the leaves and the soil with the diluted mix every couple of days. Fungus is a strange thing. It takes many forms and does not act as one would expect. Being in such a humid environment I am afraid you will keep on having fungal problems but just keep spraying. You might have to resort to a copper based fungicide

I've been testing smaller percentages of HP on a couple leaves with a cotton ball and all seems good. I'm going to spray all of them today with a larger amount. I also want to water the soil well with a higher percentage of HP so I spent the last 24 hours trying to dry the soil out. I've sprayed less water in the greenhouse, and figured out a trick to dry the soil out. I took the top inch of the soil out of the pot and spread it out flat on a sheet of plastic wrap and stuck it under the fan. That worked well to dry the top inch of the soil out and it appears that it's now dried out just a tad, deeper in the pot.

Amazingly the tree isn't wilting yet this time so I'm going to wait a couple more hours then do a thorough watering of HP and water, then spray the leaves. We'll see how it goes, it seems like a good idea.

I figured out another possible cause for the spotting and brown tips on the leaves. Since it's only the lower leaves with this problem, it may be the fact that all of the new growth up top has blocked too much light to the lower leaves. Hrm...