Author Topic: Satsuma New Orleans (cold stress - damage ?)  (Read 1907 times)

greenman62

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Satsuma New Orleans (cold stress - damage ?)
« on: November 26, 2014, 12:49:27 PM »
Hi all
i have had a satsuma in my yard for about 20 years.
I rarely do anything to it, inluding fertilize, it always seemed healthy.
For a few years i did throw a lot of water hyacinth underneath it.
sometimes some other mulch, thats about it.

It normally produces LOTS of fruit, sometimes taking a year off

Last winter was abnormally cold, very cold.
3 freeze snaps about 25F, 2 of them lasting for days
(it would warm into the upper 30s in the day)

the tree looked bad in the spring.
i gave it a little fertilizer NPK
(it may have been high N, i think thats all i had at the time)
and it just looked worse.
it produced small, thin, yellowish shoots.
it also seemed to get a host of bugs
i know another plant i had, had white fly
i think the satsuma had it also.
i now have "soot" on the leaves.
but, also had what someone said was "leaf miners"
AND...
it had some yellowing of the leaves in between the veins (veins stayed green)

Im not sure if the cold killed some roots ?
or, what to do to help it ?
i have now put lots of compost under it
i foliar sprayed it
with urine and micronutes several times
and gave it some worm tea with humic acid.

it is giving me lots of nice fruit this year

the chlorosis seems to be improving
but, i still have soot and white-fly.

any suggestions ?

thanks
Brad













Millet

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Re: Satsuma New Orleans (cold stress - damage ?)
« Reply #1 on: November 26, 2014, 06:38:01 PM »
After reading your post, I was a little surprised seeing the pictures of your tree. It does not look all that bad.  Your tree definitely has, or had leaf miners.  If you wish to treat the tree to control leaf miners you can apply Spinosad starting in the spring. However, leaf minors  do not effect a 20 year old tree as much as you might believe.  Commercial growers do not bother to treat leaf miners on large older trees.  The brown on the leaf in photo #3 looks more like rust mites rather than sooty mold.  - Millet
« Last Edit: November 27, 2014, 04:03:05 PM by Millet »

Tom

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Re: Satsuma New Orleans (cold stress - damage ?)
« Reply #2 on: November 26, 2014, 10:35:32 PM »
I agree with Millet. If picture #3 is supposed to be sooty mold I don't think it is. Sooty mold would be on the top of the leaves. If you do have sooty mold 1-3 tablespoons of horticulture oil will help the sooty mold wash off and kill scale and white flies. Follow all directions. Have a great Thanksgiving ! Tom

greenman62

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Re: Satsuma New Orleans (cold stress - damage ?)
« Reply #3 on: November 27, 2014, 01:30:17 PM »
 "photo #3 looks more like rust mites "
thanks
im pretty sure i do have white-fly and sooty mold also,
on the tops of leaves mainly, no recent pics
like a black sticky dust.

it affected a small orange tree i have
i had used s nozzle and hose - water with pressure...
and a week later it seemed much better.
the satsuma didnt seem to bounce back as well.

I dont think it will kill the tree, but ive never had problems with it before
about 2 years ago i got hooked on tropical + subtropical fruits
about 20 different ones, and lots of flowering plants, herbs etc...
i thought those would bring in enough beneficials to correct the problem.
guess not.

Will try some need oil i have first
reading up on how to do it now.

thanks
Brad

Millet

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Re: Satsuma New Orleans (cold stress - damage ?)
« Reply #4 on: November 27, 2014, 04:26:39 PM »
Sooty mold is a black somewhat feltlike fungal growth caused by a fungi called Capnodium spp.  The mold grows on honeydew excreted by juice sucking insects, including aphids, mealybugs, soft scales and whiteflies.  It does not infect the tree or fruit, but grows only on the surface.  Sooty mold causes no damage to the tree unless it becomes so heavily covered that photosynthesis is reduced and the shading of surfaces causes foliar chlorosis, or even delayed fruit ripening.  Manage sooty mold by controlling the insects that produce the honeydew.  Spraying the tree with a good horticultural oil, makes it a lot easier  to wash the mold from a tree, plus it kills the problem causing insects. - Millet

redster

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Re: Satsuma New Orleans (cold stress - damage ?)
« Reply #5 on: December 12, 2014, 02:33:52 PM »
greenman where are you located? im here in Gretna, I can certainly help tell you some of your problems if you like. I agree with the others though, from the pics the tree looks fine...
owari satsuma, ruby red grapefruit, sunburst tangerine, meyer lemon, ponkan mandarin, st ann satsuma,  gold nugget mandarin, nagami kumquat, pineapples