I'm pretty sure this is leaf streak but I'm just looking for confirmation...




It seemed to spread a few days ago after I sprayed the leaves to try to get rid of spider webs that keep showing up on my plants too

Anyway, if it is leaf streak, should I trim off the affected portions of the leaves?

Just my opinion, but I think some of that looks like
sunburn which can easily happen after spraying.

The oldest shorter leaves appear to be the result of naturally
dying off. However, not sure about the leaves that are divided
in half with yellow and green.

Personally, I do remove a portion of the leaves that yellow for whatever reason
just to clean plants up a bit.

It almost looks too uniform to be leaf streak to me. I am wondering what you sprayed with? I think leaf streak progresses a little slower than your sudden yellow streaked leaves?

I only hosed them down with water. Some of my plants are suffering from spring sickness, but not all of the ones with the brown leaves. There were small spots of brown before I turned the hose on them. We have also had a lot of rain the past few weeks too though...so it's not like when I hosed them it was the first time they got overhead water...

Some of it looks like leaf streak but I'm not sure about the one-sidedness of the yellowing on some of the leaves. What can make it difficult is that the leaf streak fungus can be a secondary invader of damage from something else, in fact it is thought to need some kind of injury in order to infect the plant. How has the moisture been in that bed, has it got dry, or wet?

It's been pretty wet and cool here all spring. But the bed has dried out a few times.

Unless it got very dry, then, it's probably not from that. Do you know your soil pH?

I don't know the exact pH. I have heavy clay soil...but I amend all beds with lots of compost. The plants that have the streak have been in there going on three years now...some only two. Should I trim off the affected leaves?

Any leaves that have very little green won't be functioning much so you could remove those. Those that still have some green will be photosythesizing so it's more an issue of esthetics, which is why we grow them in the first place. Removing the leaves can also reduce the amount of leaf streak fungus, if indeed that's what the problem is.

The reason I asked about pH is that sometimes yellow/white streaks can be related to a nutritional deficiency and it looks as though there might be some paleness between the veins on some leaves. Do you see that in real life or is it an effect of the camera?