Last night we noticed that the lower leaves on many of our greenhouse tomato plants are showing discolouration and mottling.
Fearing tomato blight, we’ve searched the interweb for confirmation, but the pattern doesn’t seem to match tomato blight, either early or late. Some picture matches seem to suggest that it could be tomato mozaic virus, which has no known controls. However this only appears to spread through direct contact with tobacco, in which case it can’t be the culprit. We’re stumped.
What do you think?
We’ve cut off all the affected leaves off the plants (they don’t look too denuded as it was mostly lower leaves and not always the entire branch) to burn this evening. Fingers crossed that’s enough to save our tomatoes, and all that lovely green fruit that’s on the cusp of ripening… Looks like two weeks of cooler wet weather has taken its toll on the greenhouse.
Update: a little more scouting has revealed some matching images that suggest magnesium damage. So hopefully the application of a magnesium rich solution, such as seaweed extract, should resolve it… Whew!
So there we are – it’s more about what the tomatoes are (or aren’t) eating, than what’s eating the tomatoes.