Tropicals & Tender Perennials: Mystery - Year 2, 0 by bettydee

bettydee wrote:
Looks like broadmite damage, but ... no evidence of mites, no exoskeletons, no live mites ... just distorted tissue. I used a good hand lens as well as a microscope. The fuzzy hairs on the leaves looked like stlagmites. I found dirt particles and small crystals in various sizes ( our water is mineral rich), but nothing else. The plants had been in the greenhouse for about 4 weeks when the symptoms started a few days ago on 2 plants. Today I found a few more plants with distorted leaves. The thermostat is set to 50ºF. Temperatures in the greenhouse vary quite a bit, but that's the norm here in south Central Texas. I'm pretty sure I don't have broadmites.

This is the second year this has happened. I used Avid for the first time last year, without results. Used it as directed — twice seven days apart. Could this be a nutrient deficiency? Of what? Or could it be because the temperatures are fluxuating so much? I am stumped! I have some Bayer's 2 in 1 Systemic that I'm tempted to use.