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.
Tomato plants are especially afflicted with bugs when they plants are poorly maintained. Some pests that attack tomato plants include stink bugs, hornworms, aphids and fruit worms. Commercial insecticides can also keep bugs off of tomato plants. Planting basil near a tomato plant may repel hornworms, and the presence of nearby thyme or lavender plants may deter slugs.