Author Topic: Mango Pests, Diseases, and Nutritional Problems (Read 532816 times)

Guanabanus · « **Reply #2125 on:** November 02, 2021, 08:49:31 PM »

Vegetative form of Mango Malformation, a Fusarium fungus in the veins. This infection spreads easily in graftwood and on clippers and pruning saws, etc.

Cut those branches off, about a foot below the affected spots, then put the visibly infected wood in the city trash bin, so that it doesn't get composted; put the normal-looking pruned-off branches under the same tree. Thoroughly sanitize saw and gloves--- such as with 91% rubbing alcohol, then hydrogen peroxide, then mid-day sun.

Paquicuba · « **Reply #2126 on:** November 03, 2021, 09:51:34 AM »

Thanks so much Har!

kyrikan · « **Reply #2127 on:** November 03, 2021, 05:32:57 PM »

hello guys, I would like some help. My mango trees seem to have a disease or a nutrient deficiency and here in Crete(Greece) where i live i can't find anyone who knows about mango trees. The first one is a seedling and the second one is a grafted tree. I have them from February and this started to happen to the new growth at September(when the weather became a little bit colder).

Guanabanus · « **Reply #2128 on:** November 04, 2021, 10:47:36 AM »

Looks like the start of Powdery Mildew and Magnesium deficiency.

kyrikan · « **Reply #2129 on:** November 04, 2021, 01:01:04 PM »

Thank you so much for the answer!!!

Polypterus · « **Reply #2130 on:** November 15, 2021, 08:32:10 AM »

Hey folks, this is my first time keeping mangos, so I was wondering whether my pickering has a disease or nutrient deficiency, or if these are just old leaves:

Guanabanus · « **Reply #2131 on:** November 15, 2021, 09:54:12 AM »

Powdery Mildew.

From seed cannot be a 'Pickering.' Must have a grafted tree of 'Pickering' to have that variety. A seedling from 'Pickering' is a new kind.

Polypterus · « **Reply #2132 on:** November 15, 2021, 11:47:05 AM »

Quote from: Guanabanus on November 15, 2021, 09:54:12 AM

Powdery Mildew.

From seed cannot be a 'Pickering.' Must have a grafted tree of 'Pickering' to have that variety. A seedling from 'Pickering' is a new kind.

Thanks for the info, I'll treat it asap.

The tree is still quite small, but it is a grafted pickering, not a seedling.

rainking430 · « **Reply #2133 on:** November 17, 2021, 01:38:35 PM »

Hi Har, what is causing this deformation of newer leaves on a young sweet tart?

Hermitian · « **Reply #2134 on:** November 17, 2021, 03:53:42 PM »

In my location mango have few pests, and those only arise when fruit is about halfway ripe. One of them is rats which I control with JT Eaton bait blocks in bait stations. The others are insects brought by ants - which are ubiquitous in this region. To reduce that problem I prune the trees to keep downward branches from touching the ground and spray the tree with one of the ACP insecticides I have on hand when the insects appear (https://plantsthatproduce.com/docs/acp.pdf). I do not use the lazy approach of tanglefoot etc. because it girdles the tree.

There is very little disease pressure here for mango. Occasionally sooty mold will arrive after an overnight marine layer fog or mist. The fungicide Abound is a very good control for that on Mango, White Sapote, brambles, and currents.

For pH control and nutrition I fertigate with N-pHuric + a water soluble with micronutrients, for which the combination works out to pH ~6.2 and NPK ratios of 10:2:6.

Guanabanus · « **Reply #2135 on:** November 17, 2021, 08:43:38 PM »

Rainking,

First picture shows mechanical damage, from wind, lizard claw, etc.

Second picture: ??

Guanabanus · « **Reply #2136 on:** November 17, 2021, 09:07:49 PM »

Hermitian,

I have no idea what "ACP" means.

rainking430 · « **Reply #2137 on:** November 18, 2021, 10:34:46 AM »

Quote from: Guanabanus on November 17, 2021, 08:43:38 PM

Rainking,

First picture shows mechanical damage, from wind, lizard claw, etc.

Second picture: ??

Ok thanks Har, at least your comment rules out the likelihood of disease. Come to think of it some guys were here mowing the other day so maybe their mowers flung some debris into the leaves in the first pic. And maybe this also happened in the past to the leaves in the second pic.

Hermitian · « **Reply #2138 on:** November 18, 2021, 01:45:55 PM »

Quote from: Guanabanus on November 17, 2021, 09:07:49 PM

Hermitian,

I have no idea what "ACP" means.

Asian Citrus Psyllid, the vector of citrus greening disease.

EddieF · « **Reply #2139 on:** November 26, 2021, 07:50:08 PM »

Weevils. Eating my Raw Honey, Peach Cobbler less so. M4, Maha, Cogs look ok, minor nibbles possibly from something else.
Can't tell for sure which weevil type, white & falls (edit- they do fly) not fly away.

Sprayed Spinosad per label 1 tablespoon per quart on all tonight. Neem had zero effect the past 2 weeks. We shall see. Anything better if needed?

Doubt i'm alone having weevil issues, thanks.
Ed

Update- morning after i saw 1 on Raw Honey & M4. Today (3 days after spraying) i saw none!
Raw Honey took the worst hit from weevils, new growth starting looks good.
Also sprayed 4 citrus trees. Looking good. Thought i'd pass this on.
Ed

Update Dec 4- rinsed all trees off yesterday & by dinner time i saw weevil eating raw honey.
And they DO fly. Was bringing leaf with weevil to take photo & flew away.

EddieF · « **Reply #2140 on:** December 15, 2021, 10:17:48 AM »

Spinosad & weevil update- i'll say it worked. Wish i discovered it before a tree got half eaten.

More importantly- a warning for using Spinosad products this time of yr.
My guess' it'll kill most pollinators too which you certainly don't want to do this time of yr.
I felt obligated to say that, seems to be a great product, use with caution at a minimum.

Ed

Jaboticaba45 · « **Reply #2141 on:** December 15, 2021, 10:30:24 AM »

Now that my mango trees are in the greenhouse, I'm seeing some scale on them. What is the best course of action? I have neem oil - would that work? Thanks.

fliptop · « **Reply #2142 on:** December 15, 2021, 10:52:42 AM »

I've heard you can dip a q-tip in alcohol and touch each one on its back and it would kill them. I've never tried this. What I've done when I've found scale on my mango trees is manually remove them with a fingernail. A little time consuming, but I don't much mind sitting by a mango tree.

Guanabanus · « **Reply #2143 on:** December 15, 2021, 10:16:39 PM »

Neem oil suffocates the scale crawlers. Maybe more. Observe label intructions about temperature limits, there in your greenhouse.

impatientgardener · « **Reply #2144 on:** December 17, 2021, 03:15:15 PM »

First two pics are Maha Chanock and third is Cac. Is this fertilizer burn, PM, or what? I am definitely guilty of over fertilizing

I'm in Tomball Tx, 9a.

Thanks for any help!

Guanabanus · « **Reply #2145 on:** December 17, 2021, 07:54:16 PM »

It looks like salt burn / fertilizer burn.

impatientgardener · « **Reply #2146 on:** December 24, 2021, 03:26:26 PM »

Coconut Cream flushing new growth. The young tree seems healthy but new growth seems irregular. I typically water w rainwater 2x/wk, maybe that's not enough since they still reside in their original 3g container. Just recently added minute amounts of greensand and gypsum (3-4 Tbsp per 3g tree). Not panicking but I would love to hear y'all's thought process. Normal or not?

I have new growth pics and pics of an established leaf possibly symptomatic.

I am sorry if this situation has already been covered. Thanks for any information!

impatientgardener · « **Reply #2147 on:** December 24, 2021, 04:16:04 PM »

Anthracnose?

Guanabanus · « **Reply #2148 on:** December 30, 2021, 01:11:16 PM »

On tender leaves, looks like Anthracnose.

On trunk, looks like Mango Bacterial Black Spot.

roblack · « **Reply #2149 on:** January 12, 2022, 09:32:32 PM »

Where can one send mango leaves for nutritional analysis and to identify deficiencies?

Apologies if this has been posted already, couldn't find.

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Author Topic: Mango Pests, Diseases, and Nutritional Problems (Read 532816 times)