Half of my tomato plants have developed a few dark brown, almost blac
areas, mostly along the stem. At first, I thought it was dirt an
gently scraped at it, taking off some of the epidermis. So far, th
affected areas don't feel mushy, but it looks like so kind of rot. Th
surrounding stems are fine. There is a little bit of yellowing on th
lower foilage on just a few of the plants, but doesn't have me worried
as it is normal this time of year. I've ruled out cold damage as tha
affects the new, tender growth. Are these the early symptoms of lat
blight? If not, then what is this
Thanks for the comprehensive disease indentification page
Unfortunately, it appears to be late blight. It's strange that I didn'
notice this until just a couple of days ago. The disease has progresse
rapidly. It is especially bad on the Gold Nugget which had been doin
so well all summer. It's nearly completely destroyed the Quali T-23
Almost every branch has those characteric water soaked lesions. Much o
the foilage is infected. A half dozen other plants have mild to moderat
symptoms. Another half a dozen have not yet shown any signs of lat
blight. And now it's even gotten to the wonderful Purple Calabash. Jus
when they finally got well-established. The causes were probably th
cool, humid weather, the fact they were planted close together, lack o
nutrients stressing the plants, and most importantly, the mistake o
planting tomatoes in the same location for 2 consecutive seasons.
Anyways, can cuttings be taken from non-infected branches? Can lat
blight spread to peppers? Is there a (practical) way to sterilize th
soil so tomatoes can be grown next year
For home gardeners, there sometimes isn't much choice but to plant in
the same place for consecutive seasons. I have a large lot by the
standards of the area I'm in, but the areas I can put in a vegetable
garden are limited. Raised beds offer some relief, as I can dig out
the soil and replace it every couple or few years, but I'd have to do
without a garden to avoid consecutive plantings.
The advice some of these garden sites give is really unhelpful, but
that's a peeve for another time.
Late blight is not much of a problem around here, so I have no
experience with it. A quick google on the subject gives some
conflicting information, too.
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