Author Topic: Mango -- SoCal heatwave damages (Read 6868 times)

sapote · « **on:** June 22, 2016, 07:05:20 PM »

SoCal heatwave in June 2016

I watered all my plants the night before the hottest day, but this recently heatwave might had killed a few of my young 1 year old seedling, cooked the Valencia 4" long young fruit, burned most of the Cac leaves. I wished I had screened all the plants from the sun but I didn't think about it.

What did you do for your mango plants?

simon_grow · « **Reply #1 on:** June 22, 2016, 07:15:32 PM »

I watered my plants really well but I still got some burned leaves on a few of my younger mango leaves and some new growth on my Jaboticaba got fried off. It was a recent graft and the new growth was just coming out.

You can spray the leaves and fruit of your trees with water and then dust them with dirt or maybe even rock dust and mineralize your soil at the same time. The water will make the dust stick to it. I saw something similar being done at a pomegranate farm but I have not personally tried it myself.

Simon

MangoFang · « **Reply #2 on:** June 22, 2016, 11:39:11 PM »

Hit 122 here on Monday. LOTS of damage to new growth and some older plant tops. And burned nearly mature
mango fruit. It was brutal. I covered some stuff but should have done more. Will go out tomorrow and keep
covering them.....It's painful to look.....

Gary

wslau · « **Reply #3 on:** June 23, 2016, 12:13:10 AM »

Geez Gary...122F? I had more damage to cherimoya and avocado leaves than to mango leaves...and that was only 106F for me. But I did lose a few mango fruits.
Another heat wave is coming, but it shouldn't be as bad as we had last weekend.

Tropic_Al · « **Reply #4 on:** June 23, 2016, 01:06:40 AM »

Damn heatwave, all my cherimoyas are fine, even the young ones, but I did loose a lot of leaves from my mangoes and new growths in my 3 year old sappodila. Also my dragon fruit sustained some damage. I used 50% shade cloth on some of the more sensitive plants. To add insult to injury, I discovered that a gopher had made it's new home in my front yard. Grrr 😡

knlim000 · « **Reply #5 on:** June 23, 2016, 01:55:03 AM »

Hi Gary,
Did you springle the tree with water a little, perhaps every hrs or so? Maybe that will help? Totally sucks to see them burned and damaged.

gozp · « **Reply #6 on:** June 23, 2016, 02:56:09 AM »

Couple of months ago i ordered 3 gallon coco cream, 7 gallon carrie & 7 gallon lemon zest.

I decided to put them in a 15 gallon pot & i placed all of the good stuffs(no synthetic fertilizer added).

Mangoes were exposed to full sun with a temp of 112 w/ no protection 2 days ago (even till now they still feasting the heat). No damage at all. I did not water the day before the blazing hot sun 2 days ago.

In my opinion, mangoes love the heat and of course when u put all the good stuff in your soil. It will help handle extreme weather.

MangoFang · « **Reply #7 on:** June 23, 2016, 12:59:40 PM »

knlim - no I didn't sprinkle with water...not sure it would help in our heat - it would just dry up in a minute or two.

gozp - yes they do love the heat! Mine were fine with our 114-115 temps a few weeks ago, but 115 is kind of a tipping
point where above that damage of some kind is likely to occur...and yet....my tall Valenica Pride placed in apparently
the perfect spot, really seems perfectly fine in that extra high heat. Microclimates do make a difference!

gary

puglvr1 · « **Reply #8 on:** June 23, 2016, 02:05:25 PM »

Good luck guys...those temps are brutal!! Its pretty brutal out here too...but a lot more humid than you guys have, but miserable too

MangoFang · « **Reply #9 on:** June 23, 2016, 02:25:41 PM »

I'm guessing your hot and humid misery is pretty much liked by your plants, Nancy!!!!

You must be getting close to a harvest of some kind if you haven't already begun
the plucking.....

Gary

AnnonaMangoLord45 · « **Reply #10 on:** June 23, 2016, 05:10:04 PM »

Strange... my mango tree survived it remarkably well

puglvr1 · « **Reply #11 on:** June 23, 2016, 05:11:34 PM »

Gary....sloooooowly ripening but not yet

raimeiken · « **Reply #12 on:** June 23, 2016, 06:10:54 PM »

I'm surprised to see that Palm springs got hotter than over here in Phoenix wow!

I have a few trees shaded with 40% shade cloth including one of my young mangoes. A few burned leaves on my trees but nothing unusual for summer here in Phoenix. Just keeping them well watered deeply every 3 days.

OCchris1 · « **Reply #13 on:** June 24, 2016, 01:27:49 AM »

I feel your pain guys. My 9ft. Ceylon cinnamon tree had about 60% of its leaves toasted. Lychee, jackfruit, coffee and cherimoya took a bit of a hit as well.
Makes me wonder how bad it would have been had i not watered the bejesus the night before the heat wave.
Chris

merce3 · « **Reply #14 on:** June 24, 2016, 10:32:09 AM »

Have you all considered using silicone? I applied as foliar and my leaves look bulletproof. They actually feel thicker... I accidentally added more than I was supposed to with no adverse effects. I sprayed my seedlings too and they don't wilt at all like they used to under the FL sun. Just a thought.

simon_grow · « **Reply #15 on:** June 24, 2016, 11:08:31 AM »

I use silica on my fruit trees but Har mentioned that you have to build it up in the plant and will not work as a last minute remedy, still, now is a great time to add it to our fertilizer regimen so that we will be prepared for our next heat wave.

Simon

Jani · « **Reply #16 on:** June 24, 2016, 04:31:25 PM »

Quote from: merce3 on June 24, 2016, 10:32:09 AM

Have you all considered using silicone? I applied as foliar and my leaves look bulletproof. They actually feel thicker... I accidentally added more than I was supposed to with no adverse effects. I sprayed my seedlings too and they don't wilt at all like they used to under the FL sun. Just a thought.

we don't get those temps in Fl though (especially the southern half), or even close to it..

Think our hot feels worse ...very hot and extremely humid...while out west it's extremely hot but dry

raimeiken · « **Reply #17 on:** June 24, 2016, 05:36:51 PM »

I've been skeptical of silica/silicon. Does it really work? What product do you guys use? and soil drench or apply as foliar?

Stan · « **Reply #18 on:** June 24, 2016, 07:55:26 PM »

Nobody tried whitewashing? If you keep the trunk and large branches cool....that might keep leaves from overheating.

simon_grow · « **Reply #19 on:** June 24, 2016, 09:59:23 PM »

Soluable silica is beneficial to plants.

http://www.firt.org/sites/default/files/Scarbrough_Silica_in_Plant_Nutrition_presentation.pdf

Simon

simon_grow · « **Reply #20 on:** June 24, 2016, 10:24:10 PM »

Here's one that's not selling a product.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC42876/

A Google search returned lots of results.

Simon

raimeiken · « **Reply #21 on:** June 25, 2016, 10:27:14 AM »

Thanks Simon for those pdfs. I love reading things like that, that aren't from the same place that sells the products.

Which products have you guys tried before?

simon_grow · « **Reply #22 on:** June 25, 2016, 10:58:18 AM »

I use Dyna grows product because it is readily available at the local nursery. I would say that there are many situations were silica is not necessary because it is already in the soil but as the articles point out, sand is not soluable and needs to be turned into a soluable form before it can be utilized by plants.

Especially out here in California, our high pH soils make it more difficult for our plants to uptake this element and our frequent watering schedule can wash away the soluable fractions. Plants in containers and mango trees planted in high pH soils can benefit from this element by helping it build stronger cell walls to better position it against attack from pests and diseases. Because of its role in strengthening plant cell walls, it may help trees grafted onto Florida Turpentine rootstock from becoming droopy.

Simon

barath · « **Reply #23 on:** June 25, 2016, 11:49:51 AM »

Quote from: simon_grow on June 25, 2016, 10:58:18 AM

I use Dyna grows product because it is readily available at the local nursery. I would say that there are many situations were silica is not necessary because it is already in the soil but as the articles point out, sand is not soluable and needs to be turned into a soluable form before it can be utilized by plants.

Especially out here in California, our high pH soils make it more difficult for our plants to uptake this element and our frequent watering schedule can wash away the soluable fractions. Plants in containers and mango trees planted in high pH soils can benefit from this element by helping it build stronger cell walls to better position it against attack from pests and diseases. Because of its role in strengthening plant cell walls, it may help trees grafted onto Florida Turpentine rootstock from becoming droopy.

Simon

Do you know of any natural sources for soluble silica? I know that horsetail can be used to prevent powdery mildew because it's high in silica, but I don't know if it's in high enough concentration to help trees.

simon_grow · « **Reply #24 on:** June 25, 2016, 12:50:33 PM »

Diatomaceous earth, manures, compost and straw are good sources but can be made more soluble by ensuring there are beneficial soil microbes that can enhance the solubility and uptake of silica. A top dressing of compost followed by several inches of mulch will help to build the soil microbial network.

I can't get into details but I can say that biofilms from soil microbes interaction with roots may help solubilize and increase the availability of plant available silica.
http://www.ipni.net/publication/bettercrops.nsf/0/26A7E8FDB7F2FBBF85257C28007A07BB/$FILE/BC%202013-4%20p14.pdf

Note that the article above says that silica uptake from the roots is preferential to foliar applications but I did not look into details how they performed their foliar applications. There are surfactants and specific times of the day that may enhance foliar applications and most importantly, much of the research has been done on cereal crops and not on trees.

Simon

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Author Topic: Mango -- SoCal heatwave damages (Read 6868 times)

Stan