Black specks on basil, morning glory, grape

SquirrelFarts(5)June 22, 2013

I've done a lot of looking and can't find a definitive answer as to what exactly this is attacking my plants. It seems to go for tender leaves, as it's hit my sweet basil, mint, morning glories, and concord grape leaves. Presents as tiny black specks on the underside of leaves, which eventually seem to drain/yellow the leaf causing holes and eventually leaf drop. Can anyone tell me what this is and/or how to treat? I've seen explanations ranging from powdery mildew, fungus, some sort of bug/parasite... need help to pin this down. See pictures.

Thank you for reporting this comment. Undo
rhizo_1 (North AL) zone 7

Do these specks wash off?

    Bookmark   June 22, 2013 at 1:19PM
Thank you for reporting this comment. Undo
SquirrelFarts(5)

They do seem to wash off with a mild scrub... they don't just rinse away. The damage to the leaf remains.

    Bookmark   June 22, 2013 at 2:11PM
Thank you for reporting this comment. Undo
jean001a(Portland OR 7b)

On basil, could be downy mildew.

Please post another image (the top leaf surface) and of an entire plant with the problem

Edit:
Also please post images of the other plants as it may be several different things.

This post was edited by jean001a on Sat, Jun 22, 13 at 14:18

    Bookmark   June 22, 2013 at 2:17PM
Thank you for reporting this comment. Undo
SquirrelFarts(5)

Here is an overall picture of the basil. Damage to the upper leaf surface can be seen. I had a couple basil plants die off a few months ago with similar symptoms, so I'd like to avoid losing this one.

    Bookmark   June 22, 2013 at 2:40PM
Thank you for reporting this comment. Undo
SquirrelFarts(5)

The morning glories seem to be particularly susceptible to this as well. Here's a good indication of the damage:

    Bookmark   June 22, 2013 at 2:44PM
Thank you for reporting this comment. Undo
jean001a(Portland OR 7b)

Possible on basil,but I'm not certain.

Review this info from Cornell to see if it's a match
http://vegetablemdonline.ppath.cornell.edu/NewsArticles/BasilDowny.html

The morning glory looks different. Perhaps environmental.

I'm curious; are you growing the plants indoors or outdoors?

    Bookmark   June 22, 2013 at 10:29PM
Thank you for reporting this comment. Undo
SquirrelFarts(5)

The basil is outside, but the morning glories are indoors. The grapes and mint are also outside. I had assumed that it was the same thing attacking all these, but that might not be the case.

    Bookmark   June 23, 2013 at 7:46AM
Sign Up to comment
More Discussions
Getting rid of soil nematodes
Dear veggie lovers: This is my first season growing...
diane_zn7a_albqnm_5500ft
Aphid central.... At my wit's end...
Every single over-wintering pepper I have is inundated...
TheRipeTomato
Tomato disease
My tomato is under attack. It looks like both insects...
garf_gw
atrazine
I am not a novice gardener, and yesterday I applied...
nancy1648
Home made seed tape
sorry - moved post to diff forum This post was edited...
oldgardenguy_zone6
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™