Problem with Collard Leaves...

Magnolias4Ever · January 16, 2009

My outside leaves have these weird brownish/black spots on the bad sides of the leaves.... the inside leaves (baby leaves) do have have it. Here's a pic of the back of a leave:

Here's a closeup pic:

The spots sort of "pit" into the leaves. You can't see the spots from the front side though.

Any ideas?

Ruth_10 · January 17, 2009

Got me. Does it rub off? Do the spots enlarge with time?

It kind of reminds me what one sees on the old, yellowing leaves on the bottom of the plants when they start going south.

Polar_Lace · January 17, 2009

Scroll down this page & read this: Specific Diseases

Common Problems

HTH

Magnolias4Ever · January 18, 2009

No, it's not like a mold... doesn't rub off. The leaves are actually pitted almost. But it doesn't go all the way thru to the front side. In looking at the front side of the leaves, you'd think they were just fine.

mresseguie · January 19, 2009

Hi, Judy.

I'm not familiar with the problems you'll experience in Alabama, but that leaf looks as if flea beetles or a similar such critter were snacking on it. Could it be this problem? If it is, there is a powdered clay that does an excellent job of protecting leaves called Kaolin Clay/Powder.

It can be mixed with water in a 50/50 mixture. Shake it up really well in a spray bottle, and spray both sides of all leaves. It'll form a very thin barrier against insects, various diseases, and even sunburn. It is water soluble, so it must be reapplied after each rain or overhead watering. It is organic and safe to ingest.

I hope you find this helpful.

Michael

Got compost?

Tomaat · January 19, 2009

Hi Magnolia,

I seen this description before on my Kai Lan and I never know what caused it... glad you asked, thanks!

Polar_Lace · January 19, 2009

I found out this too:

Quote:

Problems:

Several worms (imported cabbageworm, cabbage looper, diamondback moth caterpillar) and harlequin bugs are the major insect problems. Aphids can also be a serious problem, especially during cool weather.
Common disease problems include black rot, downy mildew and Alternaria leaf spot. Fusarium yellows may be a problem on summer-grown collards.

Horticulture Specialist, Clemson University. On this page: Collards (Brassica oleracea, Acephala Group)

Ruth_10 · January 20, 2009

It doesn't look like flea beetles to me. Flea beetle damage, in my experience, leaves more spots and the spots are uniform in size. It looks more like disease than pest damage to me, judging from the photo.

January 16, 2009	#1
Magnolias4Ever Tomatovillian™ Join Date: Jan 2008 Location: Gulf Coast of Alabama - Zone 8B Posts: 28	Problem with Collard Leaves... My outside leaves have these weird brownish/black spots on the bad sides of the leaves.... the inside leaves (baby leaves) do have have it. Here's a pic of the back of a leave: Here's a closeup pic: The spots sort of "pit" into the leaves. You can't see the spots from the front side though. Any ideas? __________________ Judy Beautiful Gulf Coast of Alabama, Zone 8B

January 17, 2009	#2
Ruth_10 Tomatovillian™ Join Date: Feb 2006 Location: MO z6a near St. Louis Posts: 1,349	Got me. Does it rub off? Do the spots enlarge with time? It kind of reminds me what one sees on the old, yellowing leaves on the bottom of the plants when they start going south. __________________ --Ruth Some say the glass half-full. Others say the glass is half-empty. To an engineer, it’s twice as big as it needs to be.

January 17, 2009	#3
Polar_Lace Tomatovillian™ Join Date: Jul 2006 Location: Z8b, Texas Posts: 657	Scroll down this page & read this: Specific Diseases Common Problems HTH __________________ It's not how many seeds you sow. Nor how many plants you transplant. It's about how many of them can survive your treatment of them.

January 18, 2009	#4
Magnolias4Ever Tomatovillian™ Join Date: Jan 2008 Location: Gulf Coast of Alabama - Zone 8B Posts: 28	No, it's not like a mold... doesn't rub off. The leaves are actually pitted almost. But it doesn't go all the way thru to the front side. In looking at the front side of the leaves, you'd think they were just fine. __________________ Judy Beautiful Gulf Coast of Alabama, Zone 8B

January 19, 2009	#5
mresseguie Tomatovillian™ Join Date: Mar 2006 Location: Oregon Posts: 159	Hi, Judy. I'm not familiar with the problems you'll experience in Alabama, but that leaf looks as if flea beetles or a similar such critter were snacking on it. Could it be this problem? If it is, there is a powdered clay that does an excellent job of protecting leaves called Kaolin Clay/Powder. It can be mixed with water in a 50/50 mixture. Shake it up really well in a spray bottle, and spray both sides of all leaves. It'll form a very thin barrier against insects, various diseases, and even sunburn. It is water soluble, so it must be reapplied after each rain or overhead watering. It is organic and safe to ingest. I hope you find this helpful. Michael Got compost? __________________ Learning to speak tomato! Got compost?

January 19, 2009	#6
Tomaat Tomatovillian™ Join Date: Mar 2008 Location: The Netherlands Posts: 154	Hi Magnolia, I seen this description before on my Kai Lan and I never know what caused it... glad you asked, thanks!

January 20, 2009	#8
Ruth_10 Tomatovillian™ Join Date: Feb 2006 Location: MO z6a near St. Louis Posts: 1,349	It doesn't look like flea beetles to me. Flea beetle damage, in my experience, leaves more spots and the spots are uniform in size. It looks more like disease than pest damage to me, judging from the photo. __________________ --Ruth Some say the glass half-full. Others say the glass is half-empty. To an engineer, it’s twice as big as it needs to be.