Herbs forum→Basil black and translucent spots

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Chicago
truszko1
Aug 18, 2020 1:38 PM CST
I've had my basil indoors for a couple of months ago. It started out really strong, and is still growing well. I am however noticing issues on the leaves that seems to be getting worse. I see a lot of black tint dots, and a bigger translucent area around these dots. Almost every lead has some version of it now. I tried to look for any bugs or mites but I didn't find any.

In the last few weeks, I've also started having major issues with fungus gnats. I think these two issues are related, but adult fungus gnats aren't supposed to damage leaves, so I'm not so sure. I fertilized my plants about 3 weeks ago and that's when the fungus gnats problem started. I am using yellow stickies and mosquito bits to get rid of the gnats.

Do you think I caused some issues applying both of these products? My basil is indoors so it shouldn't be exposed to many bugs. I don't think I'm over or under watering it either. Please advice =( I'm really proud of our basil and I wouldn't want to lose it! Could this be mildew?? I don't want to throw it away!

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[Last edited by truszko1 - Aug 19, 2020 8:00 AM (+)]
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Name: Kat
Magnolia, Tx (Zone 9a)
Region: Texas Container Gardener Herbs Moon Gardener Enjoys or suffers hot summers Heirlooms
Vegetable Grower Bookworm
Image
kittriana
Aug 18, 2020 9:18 PM CST
I have never had basil live but a year...you need to be harvesting it a bit better, have you tried putting a little fan on it to circulate the air? It looks like a bacterial type rot- black dots can also be bug scat, but I don't think thats its problem, Don't think I would have fertilized it, they grow better and stronger, but also, it is just harvest time. I hope someone who has kept it alive longer than one year hops in here, but the light is getting shorter now even outside. I believe they are grown simply to harvest, but good luck.
So many roads to take, choices to make, and laughs to share!
Chicago
truszko1
Aug 20, 2020 10:03 AM CST
I think I identified this a thrips! The damage they cause is VERY similar to this. Can anyone confirm?
Name: Kat
Magnolia, Tx (Zone 9a)
Region: Texas Container Gardener Herbs Moon Gardener Enjoys or suffers hot summers Heirlooms
Vegetable Grower Bookworm
Image
kittriana
Aug 20, 2020 10:52 AM CST
You would be able to see the tiny thrips and I saw none in your picture...CAN you spot any bugs? most things like spider mites, thrips, whiteflies , flea beetles, are ON the plant, others will hide in the soil around the plant. Pick the damaged leaves and destroy them- or throw them in soapy water to kill the bugs and eggs, Can use a lo sudsing soap, blue dawn, a bit of rubbing alcohol with water in a bowl to treat the damaged leaves before throwing them out.
So many roads to take, choices to make, and laughs to share!
Name: Zoƫ
Albuquerque NM, Elev 5310 ft (Zone 7b)
Region: New Mexico Herbs Salvias Composter Bee Lover Container Gardener
Bookworm Cat Lover Enjoys or suffers hot summers
Image
NMoasis
Aug 20, 2020 11:55 AM CST
Hi truszko. Yes, could be thrips, but you might need a protracted assault, because they pupate in the soil. Here's a good site that gives you complete info:

https://www.missouribotanicalg...

Are these the same basil plants that were crowded in a pot that you posted about awhile ago? Did you ever thin them? Overcrowded plants tend to be weak, and weak plants have less resistance to insect and disease attacks.
For me, gardening is really just an excuse for playing in the dirt. Admittedly, plants are a satisfying by-product.
Chicago
truszko1
Aug 20, 2020 12:10 PM CST
Yes, I was able to find a LOT of little buggers. Also, sadly, I found them in my other nearby plants, so I have a thrips problem 100% =(

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