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Old May 1, 2006   #1
JohnF
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Default Crud on leaves

Anyone recognize this stuff? Click
'large' or 'original' for closer view.

http://www.pbase.com/chiles400/image/59489165/medium
Friend thinks it may be a deficiency rather than a disease or pest.
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Old May 2, 2006   #2
bcday
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That looks like a bunch of mealybugs to me. Try looking through a 10x hand lens if you have one.

If those are mealybugs, you need to get rid of them.
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Old May 2, 2006   #3
MsCowpea
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Agree with BCday. Not a disease or deficiency but hard to tell with a photo. Everybody should have a cheap hand lens. In 2 seconds you could ID it yourself. Can you rub them off? If so, that would not be a deficiency.

Another possibility is whitefly. Here is a picture:

http://www.gaipm.org/top50/whitefly.jpg
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Old May 2, 2006   #4
JohnF
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I have a loupe. If you look at the original size picture http://www.pbase.com/chiles400/image/59489165/original
you will see that it is neither whitefly or mealy bugs. It is dry and does not rub off. The plants look sturdy and healthy. My friend who thinks it is a deficiency has been unable to identify a pathogen or find a critter. He says it happens to some plants in the greenhouse but not on plants outside.
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Old May 2, 2006   #5
JohnF
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Closer shot

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Old May 2, 2006   #6
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At first I thought something in a fine spray might have eaten away at the leaf. Now it looks fungal in the latest macro shot.

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Old May 2, 2006   #7
Catntree
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What does the top look like?

Reminds me of either a sucking insect, or a virus-usually spread by a sucking insect.

Odd.
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Old May 2, 2006   #8
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Tops of the leaves ( and rest of plant) look normal and healthy. I would not have discovered this if I hadn't been checking undersides of leaves for aphids. ( there were none)
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Old May 2, 2006   #9
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My only other guess is powdery mildew, which in peppers apparently only produces spores on the underside of leaves and does not always cause discoloration on the top surface of the leaf, at least until the disease is well advanced.

http://www.agf.gov.bc.ca/cropprot/peppermildew.htm

http://vegetablemdonline.ppath.corne...eryPowdery.htm
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Old May 7, 2006   #10
JohnF
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Not powdery mildew. Have posted this on other pepper forums and others have had this "problem" , also without being able to identify it. Seems to only affect C. chinense and indoor plants. Curiouser and curiouser.
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Old May 7, 2006   #11
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I think it's fungal too - in John's last pic it seems like the furry white stuff is emerging from little bumps within the leaf and growing spores (and there are lots of tiny white spots in the leaf itself).

When you read the second link that bcday posted, the description fits, altho the pics don't, yet it would be interesting to see what this leaf looks like in another couple weeks.

The fact that it is mostly affecting C. chinenses could mean that chinense foliage type is simply more susceptible to this particluar pathogen.

PP
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Old May 8, 2006   #12
JohnF
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Contrary to appearance it is not 'furry' or rough either . If you rub your finger across it it's hard to detect and does not come off. I had removed the lower leaves that were affected and now the lowest leaves are affected-I will leave them in place. It has not spread to other plants which they are very close to and still only affects the two plants--West Indian Red and Congo Trinidad. Another Congo Trindad started at same time from same seed batch is not affected. Both plants continue to appear healthy and are producing buds. Stayed tuned.
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