[IanYORK]

Hi,

I think my peppers (in the greenhouse) have blight? The first two started to grow well and got to about 2-3 inches long and then started to go brown/yellow colour at the bottom of them.   The pepper tissue is mushy.   Is this blight?

What should I do?  I have 5 pepper plants and a whole load of tomatoes (not showing any problems yet).  Should have decontaminate the GH?

Thanks, Ian

[Janeymiddlewife]

Could it be blossom end rot?
Found the following




Cause
Blossom-end rot is not caused by a parasitic organism but is a physiologic disorder associated with a low concentration of calcium in the fruit. Calcium is required in relatively large concentrations for normal cell growth. When a rapidly growing fruit is deprived of necessary calcium, the tissues break down, leaving the characteristic dry, sunken lesion at the blossom end. Blossom-end rot is induced when demand for calcium exceeds supply. This may result from low calcium levels or high amounts of competitive cations in the soil, drought stress, or excessive soil moisture fluctuations which reduce uptake and movement of calcium into the plant, or rapid, vegetative growth due to excessive nitrogen fertilization.
Management
Maintain the soil pH around 6.5. Liming will supply calcium and will increase the ratio of calcium ions to other competitive ions in the soil.
Use nitrate nitrogen as the fertilizer nitrogen source. Ammoniacal nitrogen may increase blossom-end rot as excess ammonium ions reduce calcium uptake. Avoid over-fertilization as side dressings during early fruiting, especially with ammoniacal forms of nitrogen.
Avoid drought stress and wide fluctuations in soil moisture by using mulches and/or irrigation. Plants generally need about one inch of moisture per week from rain or irrigation for proper growth and development.
Foliar applications of calcium, which are often advocated, are of little value because of poor absorption and movement to fruit where it is needed.

from
http://www.gardenadvice.co.uk/howto/disease/rot-blossomend/index.html

Not sure how to post pics from websites, but hope it isn't for your sake, however it isn't contagious, so provided you get the soil & feeding right, it shouldn't mean your toms are doomed
JMW

[Lardman]

Its not likely, have a look here http://www.thechileman.org/guide_disease.php specifically  "bacterial soft rot".