- Do some of the leaves on your tomato plants have holes in the lower outside leaves and the leaves are turning yellow?
- What should you do?
- Any other symptoms?
- Large green worms been seen on the plant? No?
- How about little tiny white or gray little bugs (Aphids)? No again!
- Blackish spots on leaves and the edge turning yellow? No!
- Just lots of little tiny holes in the leaves and they leaves are turning yellow? Right!
Other common causes of tomato problems in Colorado are:
- Phosphorus deficiency
- Curly Top virus – leaves and stems become stiff
- Psyllids – stems may become distorted
- Flea Beetles – adults chew small holes in the leaves
- Tomato hornworms – voracious feeders, they strip leaves from the stems.
- Early blight – produces brown or black spots on older leaves
- Septoria leaf spot – white or gray spots on leaves
- Whiteflies and aphids Cucumber mosaic virus – leaves appear shiny and are sticky
- Fusarium wilt and Fusarium crown rot – leaves turn brown and wilt.
Here's a complete article on recognizing tomato problems .