Author Topic: Mango Pests, Diseases, and Nutritional Problems (Read 535668 times)

Cookie Monster · « **Reply #450 on:** October 22, 2013, 11:02:33 PM »

My thought was that the fungus was a symptom rather than a cause of the problem -- simply taking advantage of the burnt margins to feast a little.

Guanabanus · « **Reply #451 on:** October 22, 2013, 11:06:16 PM »

Powdery mildew, active

nch · « **Reply #452 on:** October 22, 2013, 11:08:37 PM »

Thank you Jeff and Har. I'll just try to keep the leaves dry.

pominasia · « **Reply #453 on:** November 18, 2013, 12:55:36 AM »

Anyone have any what is attacking this mango tree ? Note that I live in Thailand.

bangkok · « **Reply #454 on:** November 18, 2013, 08:11:01 PM »

The older leaves look fine and i see new flushings are coming. I don't know what you fed them or sprayed in the garden? I use fruitbags if i want to protect new flushings (for my grafts) against insects.

I think it is not a serious problem.

Guanabanus · « **Reply #455 on:** November 18, 2013, 08:36:56 PM »

Powdery Mildew.

edzone9 · « **Reply #456 on:** December 01, 2013, 11:14:21 AM »

Hello Gang ;

My Lemon Zest Mango tree leaves appear to be semi shriveled .
My other mango trees leaves are all normal with no leave shrivel.
is this normal for the LZ or is it sick ? , if so can I bring it back o should I pull it out of the ground ?
Should I PUGG it ?

Thanks Ed..

Mark in Texas · « **Reply #457 on:** December 01, 2013, 11:38:23 AM »

I'm not a mango kinda of guy but am pretty good at reading plants, so, if I had to take an educated guess your (minor) leaf cupping is due to the natural characteristics of your cultivar OR you have a root system problem. Leaf cupping, leaf tip margin roll, shriveling, etc. are a response to moisture stress, an imbalance in tissue water turgor. That can be caused by a root system that is shot (over watering, soil rots, etc.) or inadequate watering, OR, too much plant food.

Your tree looks pretty damn healthy to me. I have a newly planted Mallika that has more upward leaf margin cupping than yours. I know the root system is fine so I'm gonna chalk it up to the "way of the world".

Topping it isn't gonna solve anything. All that's gonna do is create a tree with a shorter profile and more branching.

edzone9 · « **Reply #458 on:** December 01, 2013, 11:47:06 AM »

Thanks Mark , I will monitor it ..

Thanks again Ed..

murahilin · « **Reply #459 on:** December 01, 2013, 11:59:43 AM »

That looks like the normal growth habit of the Lemon Zest leaves to me.

edzone9 · « **Reply #460 on:** December 01, 2013, 12:13:08 PM »

Thank you...

Guanabanus · « **Reply #461 on:** December 02, 2013, 10:53:45 AM »

I don't see anything worrisome.

If the soil doesn't have much Calcium, you might give it some Gypsum (Calcium sulfate) to make the plant sturdier.

noneof · « **Reply #462 on:** February 20, 2014, 04:53:25 PM »

can anyone help me with this problem, about 5 month old mango started from seed. in miracle grow soil. started turning brown about 1 1/2 months ago. also have smaller mango tree starting with same issue. in los angeles, night temps at 50 degrees. days about 75. I water only when dry. thanks in advance.

MangoFang · « **Reply #463 on:** February 20, 2014, 04:59:19 PM »

My guess would be fertilizer burn (maybe even in the miracle grow mix -
get rid of it and just use some "normal" potting soil, maybe) or a LACK
of water....how often do you water it?

If you planted it in the ground there is much less chance of these kinds of
things happening.....

Gary

noneof · « **Reply #464 on:** February 20, 2014, 05:07:59 PM »

only reason I don't put in the ground yet is cause I heard small mangos cant handle 40 deg. night temps. so when we do get 40's I bring them inside. I was gonna wait till they are atleast 2 years to put into the ground. but I think I will change the soil. no nutes and more sand? is this plant gone, or do you think she can pull through? thanks

noneof · « **Reply #465 on:** February 20, 2014, 05:10:15 PM »

I water when top couple inches of soil is dry. and feel the weight of the pot.

noneof · « **Reply #466 on:** February 20, 2014, 05:13:44 PM »

I also have this avocado this is showing kind of the same issues. about 1 1/2 years old but is in kellogs patio plus soil. the difference with this avocado is it is still showing new growth.and mangos have stop growing new leaves.

MangoFang · « **Reply #467 on:** February 20, 2014, 05:17:40 PM »

Yep - another one - same advice as for the mangoes. Whatever you're doing with them
in pots will be significantly harder to do to them in the ground....

Gary

nch · « **Reply #468 on:** February 20, 2014, 05:55:03 PM »

What are those brown specks on your mango leaves? Soil or some kind of pests?

HMHausman · « **Reply #469 on:** February 20, 2014, 06:14:42 PM »

I'm thinking you need to be generous with your water. Miracle Grow soil drains well as long as there is a hole in the bottom of the pot. There may be other issues, but I would think watering more will be helpful. I would not let the soil dry out completely before watering. And BTW, I think mango seedlings do fine is 40 degree temps. They're fine down to frost/freezing temps.

noneof · « **Reply #470 on:** February 20, 2014, 07:06:58 PM »

lil spots on the small plant is just dust, its been real windy here. I just watered and the runoff came out real yellow so I watered for awhile till water was clear. crossing my fingers. and if my plant recovers I will put in the ground asap. thanks to all for advice.

Guanabanus · « **Reply #471 on:** February 20, 2014, 07:35:28 PM »

Check for white spores early in the morning after a cool (less than 77 degrees), humid night.

Your mango and avocado may have powdery mildew.

mangoprofessor · « **Reply #472 on:** March 08, 2014, 12:31:14 PM »

Re: question of the burnt mango leaf margins. I agree with the person who posed: forget the miracle grow potting mix. That mix is too hot, meaning too much fertilizer in the potting mix. That mix also does not have enough sand for good drainage. Young mango plants can be burnt or killed with commercial fertilizer that have too much nitrogen too. Stick to an organic potting mix with at least 40% sand for good drainage. With that kind of mix, good watering shouldn't be a problem. For watering, go light in cool weather but give the plant plenty of water during hot Summer weather. A trick that I use for large mango trees in a pot, 15 gallon size. Picture below, note the blossom panicles.

Put the pot in a basin that you can pick up at any nursery. During the Summer or hot weather, watch the basin. When the basin dries out, it is time to water again. Picture of basis at bottom of pix.

Mango Professor

Guanabanus · « **Reply #473 on:** March 08, 2014, 02:42:27 PM »

Add BTi to basin to avoid raising mosquitoes. (Mosquito Dunks, Mosquito Bits, etc)

mikesid · « **Reply #474 on:** March 23, 2014, 02:06:18 PM »

Here are some pics from 3 mango trees I have showing some deficiency. I have applied a Sequestrene Fe drench approximately 3 weeks ago. I also did a micro nutrient drench right before that using Brandt Biomaster. However I have not done foliar spray yet of either. I have not seen any improvement after the drenches. Could it be a Zn or Manganese deficiency?

PPK

Lemon Zest (my larger Lemon Zest tree leaves are normal)

Coconut Cream

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Author Topic: Mango Pests, Diseases, and Nutritional Problems (Read 535668 times)