The volume of flame, however, is increased by inert gas, and there is a proportionate diminution of the heating effect. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 Various. Nitrogen by itself is an inert gas, colorless and uninflammable. Scientific American Supplement No. 819 Various.
Tomato Spotted Wilt Virus. The tomato spotted wilt virus (TSWV) causes dark brown, purple or black spots on leaves. The spots can spread to the stems, causing cankers and streaks. The foliage begins to wilt once the disease spreads, and the leaves become stiff.
Tomatoes getting rot spots on them as soon as they turn green. My tomatoes are getting rot spots on them when they turn green.Is this a fungus or what.I've been told to use epson salt.My plants did the same thing last year.The epson did not do much good. Thank you for reporting this comment.