Marianne's Response

Upward Curling on Pepper Plants Leaves after Heavy Rains

I have numerous poblano and shishito plants. I have older producing shishito and poblano plants that are doing really well producing beautiful fruits and young ones that are still growing and are not yet producing. We just had a week worth of heavy heavy rain here in Charleston. All of my plants are in containers and sitting up off the ground on a milk crate for drainage.

I noticed shortly after the heavy rains passed that my younger pepper plants (that have not started producing yet have some serious curling at the top of the plants .The tiny leaves at the top of the plant are firm yet very wrinkly and curling upward, as if its folding in on itself. Its particularly bad on one of the young plants, but then I noticed this was happening on all of my pepper plants! Only one looks pretty bad, but they all have curling at the top on the smaller leaves.

My older producing plants have been producing beautifully for a month or so now. After those same heavy rains that there is again some tight curling upwards of the small leaves at the very top of those plants. I dont notice any other particular symptoms than there is some end rot happening on the shishito plants thats has never happened before.

So after this heavy rain all of my pepper plants have some level of upward tight firm wrinkly curling happening at the very top. I noticed some of the plants have some little chewing spots happening too, to I was wondering if there was some bugs that got a hold of my plants after all the heavy rain and cloudy weather?I dont really know and would love an idea of whats happening and what I can do to remedy the issue. Ive honestly had no issues with any of my plants up until this heavy bout of rain and want them to keep doing well. What to do?

The picture is the plant that has the worst case of this curling. This is on one of my young non producing plants that has been growing nicely and steadily but now I do not know whats happening. Essentially all of them started curling, with my older producing plants showing signs of this upward curling but not nearly at the rate and amount as my younger plants.

Posted by Aisha v on August 31, 2020

Marianne's Response

Leaf curl on pepper plants is actually rather common but it can be a number of different things. Virus, fungal, mites, aphid, thrips and watering issues all show the similar looking leaf curl. I am going to guess with the rain you have had that overwatering is the cause, and this is good as the plants should out grow the problem. The holes in the leaves could be a sign of thrip damage however. If so, you you may need to pinch out the newest growth where the tiny thrip hide.  Look for thrip insects by removing the foliage and shaking it over paper or using a magnifying glass to find the tiny, narrow thrips. Good air circulation helps prevent fungal infections but virus spread by aphid are the worst of the leaf curling causes. There is no cure for the virus that causes pepper leaf curl. Time will tell is insects or disease of simply overwatering from the rain caused this problem. You may need to bring a sample inside a plastic baggie to a Master Gardener plant diagnostic clinic to help you determine which of the many leaf curl causes it could be.  I am betting it was the rain. Keep growing, Marianne Binetti