sunburn (forum)

Brad starts with ...
So we all know slip slop slap for people but is there consensus what we do for (various) plants?

There's lots of loose information on this site about sunburn (especially avos), but no specific comparison of various approaches.

my question in this area started with one of my 3 young blueberries under shade cloth showing a very few burnt leaves after yesterdays 41 degrees. (I guess I watered too little). Because I don't fear more sunburn I removed the damaged leaves. But I guess in most cases you would leave them to shade the lower leaves - right?

so:
What to do (not do) once a tree is sunburnt?
What preventative measures do you recommend (e.g. polymer, calcium carbonate sprays, shadecloth, other trees, extra water, don't worry about it)
etc


Time: 18th January 2010 2:47pm

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About the Author Brad2
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Violet_Cactus says...
I'm no expert, but I just use shadecloth and leave any damaged leaves on the plant.

Time: 18th January 2010 4:25pm

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About the Author VioletCactus1
Melbourne
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Mish says...
Hi Brad

I have been using 'Drought Shield' from Yates (If I remember correctly Amanda mentioned it on another thread). It has been really effective against sunburn on the foliage, and helps to protect young leaves. I have sprayed my Persimmon, Mango, Lemon, Nectarines and Longan trees. I have a few trees with sunburnt leaves, but these were already burnt when I purchased them in similar heat conditions a few weeks ago. So since using DS no new sunburn has occurred. I didn't remove the leaves as they seem to still be viable (green in the middle). My Pomegranate seems to be coping well with the heat.

But it doesn't do much for my avocado (Wurtz) in relation to heat exhaustion, although no leaf burn, it has suffered droopiness. I have moved it to a more shaded spot, and watered gently this morning but it was droopy again by 10am, so I had to construct more shade. I'm reluctant to water it again as it is still moist and Avo's hate being too wet. Apart from telling 'Mr Wurtz' to "Harden up", I have constructed more shade (scrap wood and a moving trolley) to block the sun pretty much all day.

But I definitely recommend Drought Shield...




Time: 18th January 2010 9:58pm

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About the Author Mish
Singleton
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Brad says...
Thanks Mish - I think droughtshield is one of the polymer sprays. just curious - can organic growers (which I'm not) use these?

Time: 19th January 2010 1:33am

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About the Author Brad2
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amanda says...
Good info Mish! - I still haven't got around to spraying mine :-o Sunburn is interesting - we have had 4 days in a row of 40 to 46 degrees.
I haven't seen any sunburn as yet - but I have kept everything very well watered (every day) I wonder if this is the answer. Or it could be that my trees are in full sun always - so toughened to it. I try to keep a lot of foliage on my trees too - this helps protect the bark as well and shade the mulch.
Parasol is the other organic (?) remedy.

Time: 19th January 2010 7:02pm

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About the Author amanda19
Geraldton. WA
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amanda says...
Oh NO....my strawberry guava fruit got sunburnt...(nearly ripe one's too)..that's not fair...

Time: 21st January 2010 12:57pm

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About the Author amanda19
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Charles cant spell says...
My avacado, banana, potatoes, some apples and a few shade trees all got cooked. Might loose the avo but the others should bounce back. THat heat was crazy. Gl with the fuit I have a whole 4 fruit on mine but it was in the shade so they are fine.

Time: 21st January 2010 2:43pm

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About the Author Charlesstillcantspell1
Perth - Innaloo
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No gimicks says...
I work retail in a garden centre. from what i have observed, in a practical nature, good soil, regular, sufficient watering and a GOOD all purpose fertilser with microbes, combined with a wetting soil agent is all you need. And a suitable mulch which will break down and add to your soil is all you need. Oh, and timing and amount of watering is critical; moist to dry and during the day not in the evening. Any thing else and you just add to someone elses pocket!

Time: 20th January 2020 10:42pm

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About the Author No gimicks
Mundijong
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