Help ID a tomato condition
Printer-friendly versionI am growing tomatos and squash and starting to see a condition develpoing that resembles early blight. It seems to be affecting the older leaves. This is my first season with the green house. Can anyone please help with the ID and treatment.
Thanks,
Jerry
Jerry - Can you give a little more detail? How long since seeding? What's the heat level in the greenhouse? Humidity?
I agree that the tomato damage looks like some type (early or late) of blight. But squash aren't suseptable to blight. The damage to the squash looks more like bacterial wilt. So you could have two different things going on. Or (as Drew said) maybe it's something in the environment doing the damage. Could be something in the water or in the soil you're using for the plants. Did the soil (in both) come from the same source? Maybe your own mix? One thing you can do quickly and fairly cheaply is get a home soil test kit and check the pH and N-P-K, maybe that will give you a clue. If the pH is enough off the uptake of nutrients could be blocked causing all sorts of weird stuff.
I agree with Drew - keep us informed.
The best we can come up with here in the office is that it appears this problem has something to do with the water you are using. The two prevailing opinions are that it is a result of watering directly onto the leaves of the plant, and as a result the sunlight is magnified and burns the leaves. Or, it may be a problem with nutrient levels in your water. These are the answers we were able to come up with.
First question of course would be how is this condition affecting the health of your plant and its yield. Since it is almost certainly reducing the amount of active chlorophyll I would say it is adversely affecting the health of the plant. So you can try to water at the base of the plant only, and you could also do an analysis of the water you are using to check for chemical levels, etc.
Please keep us informed if one of these is the problem or if you discover the cause. We would love to know.