Planted some popcorn a month ago and now the plants have 4-5 leaves. They are tall and weak - most of them have one leaf that has broken near the stem but is still alive - all those leaves have some white dust like substance in the thing in the middle of the leaf that supports it. Also, all but the newest leaves are going brown at the tips - lower ones the most.

Some pictures:
Plant 1 - http://img408.imageshack.us/img408/4...nt1pic1oz8.jpg
http://img170.imageshack.us/img170/2...nt1pic2gb3.jpg
Plant 2 - http://img186.imageshack.us/img186/2563/plant2zd7.jpg

The window faces south-west. Fertilized it once, with the one you mix in the water, didn't help though. May the problem be the cold air from the window that is open very-very little all the time (0-15 degrees celsius outside), sunburn (about 6 hours of direct sunlight on the plants on cloudless days), saltburn, over-watering or something else?

In article ,
Player1 wrote:

Planted some popcorn a month ago and now the plants have 4-5 leaves.
They are tall and weak - most of them have one leaf that has broken
near the stem but is still alive - all those leaves have some white
dust like substance in the thing in the middle of the leaf that
supports it.

The white material is dusty looking, not like cotton?

How many plants do you have? Corn isn't self pollenating.

Also, all but the newest leaves are going brown at the
tips - lower ones the most.
Plants that have limited nutrients may put their energy into the upper
growth at the expense of the lower growth. Leads me to think there is
something wrong with the roots (rot, fertilizer burn, mold). You don't
want fine, heavy, clay soil for corn. Medium to course soils will warm
faster.

Lanky appearance may indicate lack of Sun.

Some pictures:
Plant 1 - http://tinyurl.com/3nnt99
http://tinyurl.com/4jxje8
Plant 2 - http://tinyurl.com/44sobp

The window faces south-west. Fertilized it once, with the one you mix
in the water, didn't help though. May the problem be the cold air from
the window that is open very-very little all the time (0-15 degrees
celsius outside), sunburn (about 6 hours of direct sunlight on the
plants on cloudless days), saltburn, over-watering or something else?
Corn likes heat, Sun, and water. These are the conditions you need to
optimize. Unless someone has a better Idea, I would re-pot into a larger
container (add 20% sand to 80% potting mix", tent (should be available
from nursery) and put outside on sunny days, close window at night (it's
open to reduce humidity in your home?) to increase warmth, only water
the corn when surface looks dry. Popcorn will take 90 - 120 days to
mature under ideal conditions.
--

Billy

Impeach Pelosi, Bush & Cheney to the Hague
http://angryarab.blogspot.com/
http://rachelcorriefoundation.org/

Thanks for answering.

Yes, it is dusty looking and I have 9 plants.

It seems that the leaves have stopped turning brown except for one plant.
Also, all those leaves that have that white dusty looking material and are broken are the third leaves for some strange reason.

In article ,
Player1 wrote:

Thanks for answering.

'Billy[_4_ Wrote:
;784072']
The white material is dusty looking, not like cotton?

How many plants do you have? Corn isn't self pollenating.


Yes, it is dusty looking and I have 9 plants.

It seems that the leaves have stopped turning brown except for one
plant.
Also, all those leaves that have that white dusty looking material and
are broken are the third leaves for some strange reason.

A visit to a local nursery can't hurt. Take a plant with you to identify.
In the meantime look at
http://en.allexperts.com/q/House-Pla...nts-help-1.htm
or
http://forums2.gardenweb.com/forums/...3928676.html?1
or
http://www.cpukforum.com/forum/index...howtopic=22525

It would seem that the problem is powdery mildew. Ask about a fungicide
for house plants at your local nursery.
--

Billy

Impeach Pelosi, Bush & Cheney to the Hague
http://angryarab.blogspot.com/
http://rachelcorriefoundation.org/

This white dust is only in the main veins of the leaves and nowhere else,
but a picture of powdery mildew showed that the leaf had white dust all over it.
It seems to me that something is clogging the "pipes" of the plants.

In article ,
Player1 wrote:

'Billy[_4_ Wrote:
;784233']
It would seem that the problem is powdery mildew. Ask about a fungicide

for house plants at your local nursery.

This white dust is only in the main veins of the leaves and nowhere
else,
but a picture of powdery mildew showed that the leaf had white dust all
over it.
It seems to me that something is clogging the "pipes" of the plants.

Have you been to the nursery?
--

Billy

The Death of Rachel Corrie
http://electronicintifada.net/v2/article1248.shtml

No, don't know where to find one here in Estonia.

In article ,
Player1 wrote:

'Billy[_4_ Wrote:
;784568']
Have you been to the nursery?

No, don't know where to find one here in Estonia.

OK. Hopefully you have re-potted into an easy draining soil, your
avoiding chemical fertilizers that may damage the roots, and have
figured out how to get more heat and light to your plants (tenting
them outside during sunny weather).

My first guess is that it is a root problem (probably rot from
over watering). Problem is I have no idea what the white material
is or if it is even a problem. Will it wipe off with a cloth? If so, I'd
presume that it is fungus.
-------
Presuming it is a fungus

Baking Soda Fungicide

Mix 4 teaspoons (about 1 rounded tablespoon) of baking soda and 1
tablespoon of horticultural oil (any cooking oil) into one gallon of
water. Spray lightly on foliage of plants afflicted with black spot,
powdery mildew, brown patch and other fungal diseases. Avoid over-using
or pouring on the soil. Potassium bicarbonate is a good substitute for
baking soda. Citrus oil and molasses can be used instead of
horticultural oil. Source: www.dirtdoctor.com

or

Sprinkle some cinnamon on the white spots, that may help.

or

http://faq.gardenweb.com/faq/lists/o...329023823.html

6. Apple Cider Vinegar - Use 1-2 tbls per gallon of water for a mild
fungicide or acidic liquid fertilizer. Like alcohol can be a natural
herbicide if too much is used in tea. Most white vinegars are made from
petroleum products. Apple cider vinegar can contain up to 30 trace
elements.

7. Corn meal - Use as a topdressing or in a tea for fungal control.

8. Compost teas - This multi-purpose fluid can contain beneficial
microbes and soluble nutrients that can be a mild fungicide and disease
controller.

16. Bleaches and Peroxide - great fungicides. However, most commerical
bleaches are not natural. Use 1-2 tblsp per gallon of water.

Any neighbors who grow corn?

Hea õnn
--

Billy

The Murder of Rachel Corrie
http://electronicintifada.net/v2/article1248.shtml

The white material looks like salt or sugar. It can't be wiped off as it seems to be in the main veins of the leaves. But not all leaves have it - only 1 or 2 on every plant. It seems like a problem, as it causes the leaves to break (they stay green and alive though). If it can't be wiped off, may it still be a fungus?

And unfortunately - no neighbours who grow corn.

In article ,
Player1 wrote:

The white material looks like salt or sugar. It can't be wiped off as it
seems to be in the main veins of the leaves. But not all leaves have it
- only 1 or 2 on every plant. It seems like a problem, as it causes the
leaves to break (they stay green and alive though). If it can't be wiped
off, may it still be a fungus?

And unfortunately - no neighbours who grow corn.

OK, I'm stumped. Charlie, Rachel, Ann, enigma, Om, Emilie, Bill, Joe,
come on, we have the reputation of wrecked gardens to uphold. Any ideas?
--

Billy

The Murder of Rachel Corrie
http://electronicintifada.net/v2/article1248.shtml

Billy wrote in

ct.net.au:

In article ,
Player1 wrote:

The white material looks like salt or sugar. It can't be
wiped off as it seems to be in the main veins of the
leaves. But not all leaves have it - only 1 or 2 on every
plant. It seems like a problem, as it causes the leaves to
break (they stay green and alive though). If it can't be
wiped off, may it still be a fungus?

And unfortunately - no neighbours who grow corn.

OK, I'm stumped. Charlie, Rachel, Ann, enigma, Om, Emilie,
Bill, Joe, come on, we have the reputation of wrecked
gardens to uphold. Any ideas?

i'd guess it's not causing the leaves to break, but the
breaking leaves are causing the crystaline 'stuff'.
also, corn leaves break. it doesn't really affect the plant.
we're not talking houseplant that always looks tidy. we're
talking corn, which grows best in blocks fairly close together
so that it acts as it's own windbreak & also so the corn can
pollanate. single plants in pots are going to look tatty & not
produce. it's just not a houseplant.
lee

--
Last night while sitting in my chair
I pinged a host that wasn't there
It wasn't there again today
The host resolved to NSA.

In article ,
Player1 wrote:

Planted some popcorn a month ago and now the plants have 4-5 leaves.
They are tall and weak - most of them have one leaf that has broken
near the stem but is still alive - all those leaves have some white
dust like substance in the thing in the middle of the leaf that
supports it. Also, all but the newest leaves are going brown at the
tips - lower ones the most.

Some pictures:
Plant 1 - http://tinyurl.com/3nnt99
http://tinyurl.com/4jxje8
Plant 2 - http://tinyurl.com/44sobp

The window faces south-west. Fertilized it once, with the one you mix
in the water, didn't help though. May the problem be the cold air from
the window that is open very-very little all the time (0-15 degrees
celsius outside), sunburn (about 6 hours of direct sunlight on the
plants on cloudless days), saltburn, over-watering or something else?

http://vegetablemdonline.ppath.corne...t%20Corn/CornR
ust/CornRustPhotoList.htm

Can it be one of these?

Bill

--
Garden in shade zone 5 S Jersey USA

Corn likes warmth, a lot of sun and plenty of nitrogen. The OP is missing
at least the first two of those. Not to mention possible poor drainage. At
a bare minimum shut the window! Then wait for longer days.


"Billy" wrote in message
...
In article ,
Player1 wrote:

The white material looks like salt or sugar. It can't be wiped off as it
seems to be in the main veins of the leaves. But not all leaves have it
- only 1 or 2 on every plant. It seems like a problem, as it causes the
leaves to break (they stay green and alive though). If it can't be wiped
off, may it still be a fungus?

And unfortunately - no neighbours who grow corn.

OK, I'm stumped. Charlie, Rachel, Ann, enigma, Om, Emilie, Bill, Joe,
come on, we have the reputation of wrecked gardens to uphold. Any ideas?
--

Billy

The Murder of Rachel Corrie
http://electronicintifada.net/v2/article1248.shtml

In article
,
Bill wrote:

ust/CornRustPhotoList.htm

From the description, it seems that the upper left is the culprit.
Thanks Bill.
--

Billy

The Murder of Rachel Corrie
http://electronicintifada.net/v2/article1248.shtml

In article ,
enigma wrote:

Billy wrote in

ct.net.au:

In article ,
Player1 wrote:

The white material looks like salt or sugar. It can't be
wiped off as it seems to be in the main veins of the
leaves. But not all leaves have it - only 1 or 2 on every
plant. It seems like a problem, as it causes the leaves to
break (they stay green and alive though). If it can't be
wiped off, may it still be a fungus?

And unfortunately - no neighbours who grow corn.

OK, I'm stumped. Charlie, Rachel, Ann, enigma, Om, Emilie,
Bill, Joe, come on, we have the reputation of wrecked
gardens to uphold. Any ideas?

i'd guess it's not causing the leaves to break, but the
breaking leaves are causing the crystaline 'stuff'.
also, corn leaves break. it doesn't really affect the plant.
we're not talking houseplant that always looks tidy. we're
talking corn, which grows best in blocks fairly close together
so that it acts as it's own windbreak & also so the corn can
pollanate. single plants in pots are going to look tatty & not
produce. it's just not a houseplant.
lee

Thanks Lee. The poster did say that he has nine of them (3X3), should be
OK once they are outside.
--

Billy

The Murder of Rachel Corrie
http://electronicintifada.net/v2/article1248.shtml