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thank you for the answer, photos were taken yesterday, today, there are over leaf on mango tree, they are all brown and dry.the rootstock has no leaf, it is naked, but green, the problem is at the top of the mango tree.I looked at the underside of the leaf with a magnifying glass, there was nothing. ( I should let it grow a few leaves of rootstock, to promote the growth of the graft and root or not? )
I was recommended to remove the soil and the roots dry, replace the present earth by peat.after cutting the leaves 3/4 and put a transparent bag on top of the mango tree + light for new growth, appears.What do you think?
Nobody?
What do you think it is Rob? I watched some pictures and it doesn't not look like anthracnose, I have no spots on the fruits and flowers look healthy.
The tree is indoor and I fertilized it with half the strenght of miracle grow each week.
What kind of miracle grow (liquid/granular), how did yo apply it? Each week, for how many weeks in a row?
How close are the leaves to your 1000W light? Any idea what the humidity is in your plant room?
One suggestion I would have is to get a cheap, lightweight strip thermometer (they sell them at pet shops for use on the outside of fish tanks, usually $5 or less) that you can lay on one of the leaves to see how hot it is getting under your light. The leaves may be getting hotter than the ambient temperature in your plant room, and while your pictures aren't typical of leaf burn from way too much heat, it could be that they are getting a little too warm. A cheap strip thermometer will tell you if this is happening, and if it is, you can either move the plants further from the light or get a small oscillating fan to help move air around and cool the leaves off.
QuoteWhat kind of miracle grow (liquid/granular), how did yo apply it? Each week, for how many weeks in a row?I use the all purpose fertilizer. I used it maybye for 4 weeks now, but it doesn't look like fertilizer burn. My Pickering gets the same water with the same concentration of fertilizer and don't have the symptoms of the Carrie.QuoteHow close are the leaves to your 1000W light? Any idea what the humidity is in your plant room?The light 26 inches away from the plants and the humidity ranges between 40-50%.QuoteOne suggestion I would have is to get a cheap, lightweight strip thermometer (they sell them at pet shops for use on the outside of fish tanks, usually $5 or less) that you can lay on one of the leaves to see how hot it is getting under your light. The leaves may be getting hotter than the ambient temperature in your plant room, and while your pictures aren't typical of leaf burn from way too much heat, it could be that they are getting a little too warm. A cheap strip thermometer will tell you if this is happening, and if it is, you can either move the plants further from the light or get a small oscillating fan to help move air around and cool the leaves off.What is the perfect temperature close to the leaves? I have already 2 fans. Should I get a exhaust fan to cool the room down?