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.
There are two primary fungus diseases that can produce black spots on tomato plant leaves: Septoria leaf spot and Alternaria leaf spot, also known as early blight. Septoria and Alternaria differ slightly in appearance and prefer slightly different weather climates.
Alternaria alternate, or tomato early blight alternaria, is a fungus that can cause cankers and plant leaf spots on tomato plants. It normally occurs during hot weather when there has been a significant amount of rain and humidity.nce a plant is infected tomato early blight alternaria, a fungicide can be sprayed on the plant. This can help reduce the damage from the plant, but frequently this will only lessen, not eliminate the problem. The best way how to treat leaf spot on tomatoes is to make sure it does not occur in the first place.