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Author Topic: Anthracnose without rain?  (Read 371 times)

sunny

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Anthracnose without rain?
« on: March 26, 2020, 04:24:12 AM »
I think almost ALL my fruittree's have anthracnose but it didn't rain here for many months....i did spray them with water sometimes though. Can that make antracnose to spread?

And the strange thing is that the more sunshine the tree's get the worse the leaves are looking...

It is also killing a small durian tree which i hate to see.

Tree's at the other side of the house get less sunshine, they also have it but not so bad.

So can anthracnose spread in the dry season as well?

Frog Valley Farm

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Re: Anthracnose without rain?
« Reply #1 on: March 26, 2020, 06:27:20 AM »
Mango fungal diseases are always around but healthy soil keeps it from damaging our trees and fruit.  For us in Florida there are so many Frogs.  Most trees have multiple frogs asleep on the leaves during the day and I personally am not alright with completely exterminating an entire species, all these frogs and an unknown amount of other microorganisms by spraying copper, just for a temporary fix that actually only disguises the symptoms.  There is a universal permanent solution that actually works great at managing fungal disease in Mangos and it doesn’t require spraying copper, for us it is healthy soil, organic matter and biology.
« Last Edit: March 26, 2020, 06:40:38 AM by Frog Valley Farm »

lebmung

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Re: Anthracnose without rain?
« Reply #2 on: March 26, 2020, 06:20:24 PM »
I  did spray them with water sometimes though. Can that make antracnose to spread?

Never spray mango with water. Compared to other trees, mango leaves are very resistant to losing water so misting is unnecessary.
Yes you spread the disease by misting. You should spray copper as soon as possible.

Cookie Monster

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Re: Anthracnose without rain?
« Reply #3 on: March 26, 2020, 07:25:55 PM »
Water of any sort (plus warm temps) will encourage antracnose growth: irrigation water, humidity, rainfall.
Jeff  :-)

sunny

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Re: Anthracnose without rain?
« Reply #4 on: March 26, 2020, 10:26:38 PM »
Thanks for the reply, i won't spray water anymore.

But mango's are the least infected ones actually, i grow the better varieties green mango and they are more disease resistant than the commercial varieties.

I will start spraying copper today. Let this be a warning for other growers, myself i had no idea that anthracnose is such a spreadable disease which can easy go from tree to tree and even kill them.

pineislander

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Re: Anthracnose without rain?
« Reply #5 on: March 28, 2020, 06:47:23 AM »
Not sure about your climate but morning/night fogs and dew can be just as problematic as rain or water sprays.
I noticed a difference between trees that get early morning sun to dry moisture that side got better fruit set and less fungal issues.

JakeFruit

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Re: Anthracnose without rain?
« Reply #6 on: March 28, 2020, 12:35:11 PM »
I water when needed with spray (well) irrigation, but I do it at 10:00AM when everything is in full sun and I have decent spacing. Been doing that for 2 years; I've noticed a few black spots on leaves during the really wet, hot, humid times, but it's almost entirely isolated to the less-healthy trees. I just trim the leaves with spots when they appear to control the spread.

lebmung

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Re: Anthracnose without rain?
« Reply #7 on: March 28, 2020, 06:53:37 PM »
Thanks for the reply, i won't spray water anymore.

But mango's are the least infected ones actually, i grow the better varieties green mango and they are more disease resistant than the commercial varieties.

I will start spraying copper today. Let this be a warning for other growers, myself i had no idea that anthracnose is such a spreadable disease which can easy go from tree to tree and even kill them.

some mangoes are resistant or tolerable

sunny

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Re: Anthracnose without rain?
« Reply #8 on: March 28, 2020, 10:41:01 PM »
I water when needed with spray (well) irrigation, but I do it at 10:00AM when everything is in full sun and I have decent spacing. Been doing that for 2 years; I've noticed a few black spots on leaves during the really wet, hot, humid times, but it's almost entirely isolated to the less-healthy trees. I just trim the leaves with spots when they appear to control the spread.

I water every other day with drippers early in the morning....they don't splash at all.

The worst affected ones are durian and kepel, the small durian is dead now and i cut all infected leaves from the kepel (almost all leaves)...the kepel at the other side of the house still looks perfect.

Sunshine (i mean very strong sunshine) must have something to do with anthracnose i guess...i don't spray the sick kepel often with water, maybe once in 2 weeks.

Well everything got a copper spray so let's see how it goes from now on.


lebmung

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Re: Anthracnose without rain?
« Reply #9 on: March 29, 2020, 05:50:11 PM »
remember to reapply after heavy rains, soil will get toxic over time (many years) but I guess you have no other option.

sunny

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Re: Anthracnose without rain?
« Reply #10 on: March 29, 2020, 11:30:23 PM »
remember to reapply after heavy rains, soil will get toxic over time (many years) but I guess you have no other option.

The other option is to grow citrus which grow well in the same spot...they look perfect especially pomelo. Also the green mango's , achacha, annona, don't suffer much from anthracnose.

But kepel (Stelechocarpus burahol) suffers very much from it in full sun, in half shade it doesn't suffer at all....i don't understand it, maybe tree's in our extreme strong sun (12 hours a day for 6 months) need more fertilizer or micro's or so?

lebmung

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Re: Anthracnose without rain?
« Reply #11 on: March 30, 2020, 06:12:33 AM »
some are understory plants, which means they grow best under a big tree with partial shade. The sun in in udon right now it's very strong plus it's very hot

sunny

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Re: Anthracnose without rain?
« Reply #12 on: March 30, 2020, 08:02:24 AM »
some are understory plants, which means they grow best under a big tree with partial shade. The sun in in udon right now it's very strong plus it's very hot

Yes i agree, i just saw some movies about the jungle in borneo and there they have to fight for the sun, only the huge tree's get full sun on their crown.

but i was thinking maybe with extra potassium they will be stronger and can handle the extreme sun better.

There's no way fighting anthracnose here because in the rainy season we have rain every other day.

lebmung

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Re: Anthracnose without rain?
« Reply #13 on: March 30, 2020, 02:53:42 PM »
That is valid for your fingerlime as well, one of the reasons you lose fruits.
Potassium will not do much, it's good during cold weather not hot .

 

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