please help for downy mildew

cassiani · June 19, 2016

just removed some leaves on all basil plant bought last week at local garden center. Some are more infected than other but all of them had downy mildew. I'm worry about my tomatoes growing just a few inches away.

Basil plants are 4th set of leaf seedling while my 21 tomatoes are monster plants already some are 5 feet high.

Should I remove and destroy all my basil? (not a big sacriffice compare to all i've done for my tomatoes...)

cassiani · June 19, 2016

here is some picture of infected removed leaves.
[IMG]file:///Users/danielcassiani/Pictures/Bibliothe%CC%80que%20Photo%20Booth/Pictures/Photo%20du%2016-06-19%20a%CC%80%2010.52%20%232.jpg[/IMG]Photo du 16-06-19 à 10.52 #2.jpg

Photo du 16-06-19 à 10.52 #3.jpg

Photo du 16-06-19 à 10.53.jpg

Cole_Robbie · June 19, 2016

http://vegetablemdonline.ppath.corne...asilDowny.html

I would probably cull the Basil.

gorbelly · June 19, 2016

Basil Downy Mildew shouldn't affect tomatoes, should it? It's a danger to other basil plants, though, and can spread far on the wind, from what I understand. It's the reason why I never buy basil plants anymore. I grow all my basil from seed from trusted sources now.

pinklady5 · June 19, 2016

The basil I bought this year and last year were infected. Purchased from the same local supplier. I noticed after they were planted so I pulled them. So far the tomatoes are doing fine

cassiani · June 19, 2016

I agree with starting from seeds but mine died first week of may with low temperature at night.

So from the pictures, is it clear to everyone this is downy mildew?

gorbelly · June 19, 2016

Sorry--I did not see the pictures the first time around. That doesn't look like downy mildew to me. Downy mildew usually looks like yellowing/wilting/puckering with fuzzy dark stuff on the undersides, not the well-delineated dark spots shown in your photos.

greenthumbomaha · June 19, 2016

You might as well pull it as its all downhill from the onset. Try growing a disease resistant variety for a second planting. Johnny's has seed for Eleonora. I would stock up on this variety while it is available. There was a run on it a few years ago.

- Lisa

gorbelly · June 19, 2016

You haven't by chance been seeing four-lined plant bugs around? Scroll down to the third photo for damage that looks a bit like what you're showing.

cassiani · June 19, 2016

i'm not takin any chance and gonna remove my basil tonight

Starlight · June 19, 2016

After you remove, I would use some of Bill's bleach spray and spray that area of ground good with it to make sure all contaminants are destroyed.

b54red · June 21, 2016

Quote:

Originally Posted by Starlight

After you remove, I would use some of Bill's bleach spray and spray that area of ground good with it to make sure all contaminants are destroyed.

Before you remove the plants you might want to try the bleach spray on the basil. If it is some type of mildew then the leaves that are affected should shrivel and die. Here is a link you should read before using the diluted bleach spray.
http://tomatoville.com/showthread.ph...t=bleach+spray

Bill

gorbelly · June 21, 2016

Quote:

Originally Posted by b54red

Before you remove the plants you might want to try the bleach spray on the basil. If it is some type of mildew then the leaves that are affected should shrivel and die. Here is a link you should read before using the diluted bleach spray.
http://tomatoville.com/showthread.ph...t=bleach+spray

Bill

Although I've used this method before and think it's a good last resort, note that the bleach will further damage any leaves that are already damaged, whether the damage is from fungal sources or not. If a pest has left openings in the leaves for the bleach to get in and start destroying cells, it will.

gorbelly · June 21, 2016

I'm starting to think that that looks like some kind of bacterial spot. Or it could be cercospora manifesting in smaller spots than the usual presentation? I would probably send a sample to the extension for confirmation--not that it would help this year's plants, but I always like to know what I'm dealing with as a variable in the garden.

cassiani · June 22, 2016

here is a new picture. It start from brown-gold patch than the black spots appear

At this point I am sure this is not downy mildew.

June 19, 2016	#1
cassiani Tomatovillian™ Join Date: Apr 2016 Location: montreal Posts: 31	please help for downy mildew just removed some leaves on all basil plant bought last week at local garden center. Some are more infected than other but all of them had downy mildew. I'm worry about my tomatoes growing just a few inches away. Basil plants are 4th set of leaf seedling while my 21 tomatoes are monster plants already some are 5 feet high. Should I remove and destroy all my basil? (not a big sacriffice compare to all i've done for my tomatoes...)

June 19, 2016	#6
cassiani Tomatovillian™ Join Date: Apr 2016 Location: montreal Posts: 31	I agree with starting from seeds but mine died first week of may with low temperature at night. So from the pictures, is it clear to everyone this is downy mildew? Last edited by cassiani; June 19, 2016 at 02:09 PM.

June 19, 2016	#3
Cole_Robbie Tomatovillian™ Join Date: Jun 2012 Location: Illinois, zone 6 Posts: 8,407	http://vegetablemdonline.ppath.corne...asilDowny.html I would probably cull the Basil.

June 19, 2016	#4
gorbelly Tomatovillian™ Join Date: Jul 2015 Location: Southeastern Pennsylvania Posts: 1,069	Basil Downy Mildew shouldn't affect tomatoes, should it? It's a danger to other basil plants, though, and can spread far on the wind, from what I understand. It's the reason why I never buy basil plants anymore. I grow all my basil from seed from trusted sources now.

June 19, 2016	#5
pinklady5 Tomatovillian™ Join Date: May 2011 Location: Central NJ Posts: 234	The basil I bought this year and last year were infected. Purchased from the same local supplier. I noticed after they were planted so I pulled them. So far the tomatoes are doing fine

June 19, 2016	#8
greenthumbomaha Tomatovillian™ Join Date: Nov 2011 Location: Omaha Zone 5 Posts: 2,514	You might as well pull it as its all downhill from the onset. Try growing a disease resistant variety for a second planting. Johnny's has seed for Eleonora. I would stock up on this variety while it is available. There was a run on it a few years ago. - Lisa

June 19, 2016	#11
Starlight Tomatovillian™ Join Date: Jan 2015 Location: AL Posts: 1,993	After you remove, I would use some of Bill's bleach spray and spray that area of ground good with it to make sure all contaminants are destroyed.

June 21, 2016	#14
gorbelly Tomatovillian™ Join Date: Jul 2015 Location: Southeastern Pennsylvania Posts: 1,069	I'm starting to think that that looks like some kind of bacterial spot. Or it could be cercospora manifesting in smaller spots than the usual presentation? I would probably send a sample to the extension for confirmation--not that it would help this year's plants, but I always like to know what I'm dealing with as a variable in the garden.