Tropical Fruit Forum - International Tropical Fruit Growers



Author Topic: Mango Pests, Diseases, and Nutritional Problems  (Read 303980 times)

Guanabanus

  • Hero Member
  • *****
  • Posts: 2626
  • SE Palm Beach County, East of I-95, Elevation 18'
    • USA, Florida, Boynton Beach, 33435, Zone 10b
    • View Profile
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #275 on: December 28, 2012, 11:43:20 PM »
Bangkok,
It looks like powdery mildew on your mango blossoms, not mealy bug.  So you need a curative fungicide.  Make sure the label doesn't forbid spraying on open blooms (full flower).

Cookie Monster.
Sulfur is fine when temperatures won't be above about 80 degrees Fahrenheit.  Make sure that you haven't sprayed oil within the last three weeks, and don't spray oil for three or four weeks after sulfur.

Or you might try Plant Doctor, which is labeled for anthracnose on mangos and for powdery mildew on other plants.  ??

Insecticidal soap also kills hyphae of powdery mildew when it is applied when they are actively growing.

Presence of enough oil to repel water also prevents powdery mildew growth.
Har

bangkok

  • Hero Member
  • *****
  • Posts: 2823
    • View Profile
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #276 on: December 29, 2012, 06:59:08 AM »
Then powdery mildew can even grow in the full sun here in Bangkok. I will spray something because it ruined many flowers allready.

jc

  • Hero Member
  • *****
  • Posts: 539
    • Treasure Coast, Florida, 10a
    • View Profile
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #277 on: December 29, 2012, 09:42:11 AM »
Any ideas as to what this cayenne pepper looking stuff is?  It's on my Rosigold, Lancetilla, and Lula avocado leaves.  Smears easily and looks like wet rust streaks.

How can I get rid of it?






JC

Tropicalgrower89

  • Zone 10b, Florida
  • Hero Member
  • *****
  • Posts: 1561
    • Pembroke Pines, FL, 33024, 10b
    • View Profile
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #278 on: December 29, 2012, 02:04:18 PM »
Red spider mites. I just give the tree a good soak of water since the spider mites hate water and moisture.
Alexi

bsbullie

  • Hero Member
  • *****
  • Posts: 8714
    • USA, Boynton Beach, FL 33472, Zone 10a
    • View Profile
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #279 on: December 30, 2012, 09:46:19 AM »
I would go with something just a little stronger than H2O.  Volck oil should rid the tree of mites.  Just keep in mind of any sulfur application if/when spraying oil.
- Rob

natsgarden123

  • Guest
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #280 on: December 31, 2012, 02:25:15 PM »
This is the only tree in my yard which has this:  Lemon Zest

Please Help!










Tropicdude

  • Hero Member
  • *****
  • Posts: 2096
    • Dominican Republic, Zone 13B.
    • View Profile
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #281 on: December 31, 2012, 06:36:18 PM »
Does the white rub off ? or is it lack of chlorophyll in the leaf cells. ?
William
" The best time to plant a tree is 20 years ago.....The second best time, is now ! "

Guanabanus

  • Hero Member
  • *****
  • Posts: 2626
  • SE Palm Beach County, East of I-95, Elevation 18'
    • USA, Florida, Boynton Beach, 33435, Zone 10b
    • View Profile
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #282 on: December 31, 2012, 09:09:46 PM »
Mites.  See above.
Har

natsgarden123

  • Guest
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #283 on: December 31, 2012, 10:03:45 PM »
Thanks. High temp supposed to be 79 tommorrow. Too warm for oil? Anything else effective?

Guanabanus

  • Hero Member
  • *****
  • Posts: 2626
  • SE Palm Beach County, East of I-95, Elevation 18'
    • USA, Florida, Boynton Beach, 33435, Zone 10b
    • View Profile
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #284 on: January 01, 2013, 11:10:22 AM »
On hardened mango leaves any temperature below 80 Fahrenheit should be OK to spray heavy dormant oil like Volck Oil.  Some of the highly refined light summer oils can be sprayed on hardened mango leaves even above 90 degrees.
Har

natsgarden123

  • Guest
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #285 on: January 02, 2013, 09:35:06 AM »
On hardened mango leaves any temperature below 80 Fahrenheit should be OK to spray heavy dormant oil like Volck Oil.  Some of the highly refined light summer oils can be sprayed on hardened mango leaves even above 90 degrees.

sprayed the entire tree yesterday- does this need to be repeated?  thanks
Nat

Guanabanus

  • Hero Member
  • *****
  • Posts: 2626
  • SE Palm Beach County, East of I-95, Elevation 18'
    • USA, Florida, Boynton Beach, 33435, Zone 10b
    • View Profile
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #286 on: January 02, 2013, 09:44:21 PM »
When you see live mites walking around, spray again.  Preferably before they have had time to lay eggs.
Har

jc

  • Hero Member
  • *****
  • Posts: 539
    • Treasure Coast, Florida, 10a
    • View Profile
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #287 on: January 06, 2013, 10:35:00 PM »
Red spider mites. I just give the tree a good soak of water since the spider mites hate water and moisture.
I would go with something just a little stronger than H2O.  Volck oil should rid the tree of mites.  Just keep in mind of any sulfur application if/when spraying oil.

Thanks for the diagnosis and treatment options.  Picked up some Organocide 3 in 1, gonna give it shot. 
JC

Tropicdude

  • Hero Member
  • *****
  • Posts: 2096
    • Dominican Republic, Zone 13B.
    • View Profile
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #288 on: January 24, 2013, 08:26:08 PM »
Been wanting to get these up, I have a problem with a few of my potted mango trees, hope someone can identify the problem.

I have looked at probably a hundred photos online of mango problems but cannot seem to pin down one that looks similar, closest I could find was a sulfur deficiency.

notice that the chlorosis is not just between the veins, its patchy randomly scattered , although it seems to concentrate  towards the outer part of the leaf away from the stem.   also,  doesn't seem to matter if leaf is new or old.   My lemon Zest, Coconut Cream, and Maha Chanok have similar conditions.  although the MC is only slight.  the rest of my mangoes are ok.

Coconut Cream


Close up
William
" The best time to plant a tree is 20 years ago.....The second best time, is now ! "

Guanabanus

  • Hero Member
  • *****
  • Posts: 2626
  • SE Palm Beach County, East of I-95, Elevation 18'
    • USA, Florida, Boynton Beach, 33435, Zone 10b
    • View Profile
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #289 on: January 25, 2013, 07:48:26 PM »
I don't know.

Possibilities:  chemical exposure (herbicide), virus, and perhaps sunburn.  In case it is viral, sanitize clippers after use on these plants.
It might also be light damage from mites or thrips or lacebugs.

I don't see Sulfur deficiency.
Har

Tropicdude

  • Hero Member
  • *****
  • Posts: 2096
    • Dominican Republic, Zone 13B.
    • View Profile
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #290 on: January 25, 2013, 09:51:03 PM »
I don't know.

Possibilities:  chemical exposure (herbicide), virus, and perhaps sunburn.  In case it is viral, sanitize clippers after use on these plants.
It might also be light damage from mites or thrips or lacebugs.

I don't see Sulfur deficiency.

I do not use herbicide, except for neem on occasion, but not on this plant,  usually the citrus, and the bigger tree that has a bit of powdery mildew and those trees do not have this.  something microscopic maybe. or something that came then went.  in the same picture you can see a small Kesar just below, that one is healthy as can be.
William
" The best time to plant a tree is 20 years ago.....The second best time, is now ! "

Herman

  • Member
  • ***
  • Posts: 99
    • View Profile
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #291 on: February 27, 2013, 11:38:59 PM »
Hello mango experts!  The "new" leaves on my mallika mango has been yellow since it flushed in December 2012, and still has not turned green.  Also, it started as yellow-green instead of the red I see in other pics around the internet.  Is this normal or is it some deficiency?  Also I watered it this morning and when I came home from work I noticed some browning at the tips of the new leaves.  I have attached pics.

Thanks for your help!

Herman





HMHausman

  • Mod Emeritus
  • Hero Member
  • *****
  • Posts: 3367
    • USA, Fort Lauderdale, Broward County, Florida, Zone 10B
    • View Profile
    • Pines Ticket Defense, LLC
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #292 on: February 28, 2013, 07:54:19 AM »
Definitely a mineral deficiency.  I never know, by the color and mottling of the leaf alone, which of the mineral(s) it is missing.  I would apply a time released, balanced fertilizer containing minor elements and see how it responds.  What kind of soil are using and what type of fertilizer are you using? Har (Guanabanas) is much better than me at deciphering the look of the particular mineral lacking by the look of the leaf.
Harry
Fort Lauderdale, FL 
USA

Guanabanus

  • Hero Member
  • *****
  • Posts: 2626
  • SE Palm Beach County, East of I-95, Elevation 18'
    • USA, Florida, Boynton Beach, 33435, Zone 10b
    • View Profile
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #293 on: February 28, 2013, 10:37:36 AM »
Harry is right, as it does look like a multiple deficiency, presumably including of Iron and Potassium, and possibly Nitrogen, Sulfur, Magnesium, Zinc, Manganese....
Har

mangomandan

  • Hero Member
  • *****
  • Posts: 1106
  • When a man is tired of mangos, he is tired of life
    • USA, Lake Worth, Florida, 33461, 10a
    • View Profile
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #294 on: February 28, 2013, 12:21:15 PM »
Are there good fungicide options available in Florida for mango trees?   The Organocide Plant Doctor doesn't seem to be helping my Dot this year, and it rains every single time I apply copper.

I'm finally beginning to understand the wisdom of choosing cultivars that are more resistant to anthracnose.

So, have any of the following varieties been around long enough to give some idea of their relative resistance to anthracnose?

Angie, Coconut Cream, Lemon Zest, Maha Chanok, Po Pyu Kalay, or Spirit of 76

Squam256

  • Hero Member
  • *****
  • Posts: 2122
  • Mangos and budwood for sale
    • USA, West Palm Beach, FL, 33405, Zone 10b
    • View Profile
    • https://www.facebook.com/TropicalAcresFarms
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #295 on: February 28, 2013, 01:30:33 PM »
it rains every single time I apply copper

Tell me about it......

HMHausman

  • Mod Emeritus
  • Hero Member
  • *****
  • Posts: 3367
    • USA, Fort Lauderdale, Broward County, Florida, Zone 10B
    • View Profile
    • Pines Ticket Defense, LLC
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #296 on: February 28, 2013, 01:30:58 PM »
I'm finally beginning to understand the wisdom of choosing cultivars that are more resistant to anthracnose.
So, have any of the following varieties been around long enough to give some idea of their relative resistance to anthracnose?

Angie, Coconut Cream, Lemon Zest, Maha Chanok, Po Pyu Kalay, or Spirit of 76

Maha Chanok, PPK and Angie all have excellent resistance.

Spirit of 76 I would classify as average fungal resistance.

Coconut Cream I can't comment yet, but my small tree has tried to set fruit and they have not demonstrated good holding power so far....but the jury is out (at least it has bloomed and is blooming again).

Lemon Zest.....no blooms on two trees.  The tree itself seems highly susceptible to black sooty mold so I am very skeptical about its overall fungal resistance.

Stay tuned for further updates.
Harry
Fort Lauderdale, FL 
USA

mangomandan

  • Hero Member
  • *****
  • Posts: 1106
  • When a man is tired of mangos, he is tired of life
    • USA, Lake Worth, Florida, 33461, 10a
    • View Profile
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #297 on: February 28, 2013, 01:41:11 PM »


Maha Chanok, PPK and Angie all have excellent resistance.



Thanks, Harry. It sounds like I will eventually have some tasty mangos at my disposal.

puglvr1

  • Hero Member
  • *****
  • Posts: 1946
    • USA, Central, FL xxxxx, Zone 9b
    • View Profile
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #298 on: February 28, 2013, 02:12:09 PM »
"Are there good fungicide options available in Florida for mango trees?   The Organocide Plant Doctor doesn't seem to be helping my Dot this year, and it rains every single time I apply copper."


Dan, how often are you spraying the Dot mango tree...I was reading the directions for mango trees on the Plant Doctor and it says:

"Spray tree every 14 days
during blossom period, then
monthly until harvest."

Wasn't sure...but, it sounds a little excessive and didn't want to apply it that often? Afraid of the long term affects. Any thoughts?

bsbullie

  • Hero Member
  • *****
  • Posts: 8714
    • USA, Boynton Beach, FL 33472, Zone 10a
    • View Profile
Re: Mango Pests, Diseases, and Nutritional Problems
« Reply #299 on: February 28, 2013, 02:54:28 PM »
I have never heard of being resistant to sooty mold as sooty mold is a byproduct of actual pests, whether on the specific plant or on some other plant not an actual fungus that is attacking the plant.
- Rob

 

Copyright © Tropical Fruit Forum - International Tropical Fruit Growers