pecker88 said:
Either too much fertilizer or herbicide damage. I've had both scenarios produce plants that looked exactly the same.
Herbicide damage, specifically 24D tends to make newer leaves curl, be much smaller and look deformed.
Remember herbicide can come from a variety of sources:
- applicator drift. 24D-like chemicals can travel a 1/4 mile with minimal wind, effecting all broadleaf plants with [tiny] ppm exposure
- compost (herbicide used on grass clippings for example) then put in compost
- manure, animals eat hay or green foliage that has been treated with Tordon
- any Tordon-like chemical applied to soil, composted or passed through an animal can last up to 7 yrs
- I believe there is still a class action law suit against DOW chemical re: the above point
I agree100%. If no mites can be found this is classic growth regulator herbicide (2,4-d) damage.
I remember back in the day when I used to try to help folks who posted pics of similarly damaged plants. It seemed my advice always got drowned out by everyone screaming "MITES!" (even though no one had identified them or even looked yet).
People don't seem to realize how far 2,4-d vapor can travel in the air or how even a tiny amount can cause significant damage. The problem is, people see the damage and reflexively spray pesticides. Then, when the herbicide has worked its way out of the plant's system and the plants start looking normal again, they claim victory and assume the spraying did the trick. That reinforces the habit.
Ugh. Sometimes people need to take a step back and concentrate on determining the causative factor. And then decide on a course of action. Even if it's just chilling out, drinking a beer and pinching off some ugly leaves.
Sorry, everybody. I'll step off the soapbox now!