Mango Pests, Diseases, and Nutritional Problems

[mangoba]

Any obvious deficiencies from this recent flush please? Ignore the salt damage in last year's growth, keep in mind that this seedling was recently transplanted in the ground with some damage to the taproot. I'm thinking of spraying micros as my soil won't provide much (soil test attached) but should I rather wait for the next flush? Currently I'm just adding Humic/Fulvic acids and seaweed extract + very light amino acid & NPK.



Soil test:

[Guanabanus]

Nicely detailed soil report.  Manganese is low in relation to amount of Iron--- should be similar amounts.

Plant looks good.

[Victoria Ave]

Hi Har,

Last year was the first year I got good flushes (about 4 flushes)I’ve noticed them growing from lower on the tree. The very top got badly roasted a couple years ago when we had a 116° day and has been kind of hanging in there but every year I would have to remove branches.

Soil is clay. Based on research I did years ago I built a 4x4 planter out of redwood fence panels and mixed some native clay but also raised bed mix and sunshine #4 to make a fast draining soil. It is irrigated by in-line drip tubing coiled around the tree. This morning I proved around and found that not very close to the dropper the soul was significantly drier even though the irrigation ran last night (42 gallons over 6 hours, set to run every 5 days right now.)

I believe a culprit lately has been our winds. It hasn’t been that hot, but the wooden slats with gaps and the loose soil could dry out easily with the winds we get here. Also my trees in clay do quite well with the drip emitters because the moisture spreads more evenly over distance. In the raised planter it just goes down quicker. Today I thoroughly wetted the entire root zone with a hose. I read a study on Pakistani mango growing on drip and they reported that soaking the entire root zone once a month brought tree production closer to flood irrigation. So I will monitor.

Last year I gave my trees citrusgain once a month and they responded well. This year I’ve used to coated oscomote on my non fruiting trees and this year on the Vp just been using a drench of fish and kelp emulsion and humid acid kelp concentrate that works out to about 2-1-9. Trees get applications of pelletized gypsum and iron/sulfur in spring and fall. I should spray with Southern Ag citrus spray as I haven’t since right after harvest

Summers here average very hot (90-100) and UVis intense and I’ve found this tree to thrive under 30% shade cloth. But maybe I’m not irrigating enough? Last year was good growth with increased irrigation.

Sorry for the novel and thanks for you time

Wanted to bump this, thanks

[Guanabanus]

Victoria Ave,

Better-spreading irrigation at the surface, and the shadecloth, would indeed both help.

You didn't mean to say 42-gallons on one plant, did you?

Shading / windbraking the planter box sides, with burlap or with potted plants, would also provide some relief.

I didn't see mention of a substantial source of Calcium.

[Malhar]

My Manilla mango tree leaves look like these.  Is that powdery mildew or some thing else?



In addition, it's apical growth is slow and weak.  Can it be due to a nutritional deficiency or some type of insect damage?
Thanks

[Victoria Ave]

You didn't mean to say 42-gallons on one plant, did you?

I did, this is for my producing tree. Am I drastically over watering? I just used my moisture probe and in the raised mango tree the soil moisture was around 6 out of ten but about 10 inches down it suddenly jumps up to 9 (where I hit clay). Irrigation ran almost 2 days ago. All the other trees in clay under mulch are at a happy 8 under the mulch.

Maybe after this season I will try transplanting the Valencia pride. I played it when I really didn’t have a plan

[Guanabanus]

Malhar,
deficiencies of Zinc, Manganese, Copper, and Potassium.

[Calusa]

Let me try a 3rd time to get a response.

Hello - My young mango trees don't appear to be putting out typical robust new growth since I removed the blooms a couple of months ago. The first photo shows the Maha Chanock, with one new growth appearing only a couple of weeks after I removed the blooms, but is stunted. It's been that size for over a month. The 2nd photo shows the growth buds that began appearing a month ago. They are very slow to pop out.




The next photos show my Glen Mango with some peculiar growth -  one photo shows one new growth growing downward, the others just very tiny and weak looking. Maybe I'm a overly concerned but need some opinions. I have fertilized these trees with a good mango/citrus fertilizer with micronutrients, and keep them watered in between the infrequent rains in West Central Florida this Spring.

[599gh888]

Check with a magnifier lens, for mites. 

Or it might have phytophthora root rot.  The stems already look shriveled.

Any treatment for this disease?  Thank you Har

[Guanabanus]

Calusa,

Deficiencies of Zinc and Copper.

[tonyma]

I notice black dots on 2 young leaves, then next day, it spreads too quickly to many more. Does anyone know what it is and how to treat it? Appreciate it.

[Calusa]

Calusa,

Deficiencies of Zinc and Copper.

THANK YOU!

[Guanabanus]

Tonyma,

Probably Mango Bacterial Black Spot.  Or Anthracnose.  For either, spray with any Copper product.

[tonyma]

Tonyma,

Probably Mango Bacterial Black Spot.  Or Anthracnose.  For either, spray with any Copper product.

Thanks, will do it very soon.

[Carbo]

My Pickering is showing me something isn't right.  What's it trying to tell me?  And my Honey Kiss, planted from a 7 gallon pot last summer is also showing a similar leaf pattern, but not quite as obvious.

[fliptop]

Check with a magnifier lens, for mites. 

Or it might have phytophthora root rot.  The stems already look shriveled.

Any treatment for this disease?  Thank you Har

See Har's response #2212 on page 89 of this thread.

[599gh888]

[599gh888]

The above images are from my LZ. Anthracnose is really bad. Can I get your input on what I should do?  This tree have been planted there for two years. No fruit yet. Should I remove it and replace it with something else. The trunk lower in the plant is also peeling

[599gh888]

I just finished spraying with copper earlier and I sprayed sulfur last week. Any chance to save any of the branches infected with anthracnose?

[Guanabanus]

Sprays usually don't fix damage already done--- no resurrection of dead tissue.

[mangoba]

Small ants are always interested in very tender new shoots, I keep blowing on them to disturb them but I'm not even sure if they're doing any harm. Any similar experience?

[Guanabanus]

Ants transport the young of pests.

[Jagmanjoe]

Having issues that seem to be spreading among several small grafted mango trees as well as a couple of seedlings now.  I thought it was Anthracnose and sprayed a little over a week ago with Cueva Copper and then a few days later with a mild soap solution but it still seems to be spreading.
Any thoughts on ways to get this under control would be appreciated as it is destroying new growth.

[JakeFruit]

I have one branch on a tree that's leaking sap from three spots, all at/around the same point on the branch. It's right below where I grafted in Cecilove early last year, but there are many grafts on the tree and none are bleeding sap like this. Worried it might be MBBS. Is there any treatment I could do to encourage healing?

[Guanabanus]

Jagmanjoe,
Wind damage followed by fungus infections: Anthracnose, and probably also Cylindrocladium.

3rd picture:  mineral deficiencies--- Zinc, and probably Copper and Sulfur.