Did you know that Sulfur powder (Sulphur) is very useful for the tomato plants?
It kills all small insects that eat this plant as well as it is considered as nutrients for the tomatoes.
This type of insects enters the tomato and eat it from inside, some farmers and gardeners consider it as a worm.
look at this very clean and pure tomato full of nutrient:
while look at these poor once, not fed by Sulfur:
Sulfur is one of the world's oldest remedies for gardens and human ailments. It occurs naturally as a pure element in the form of yellow powder and as crystals. ... Sulfur readily forms compounds such as pyrite (iron sulfide) and gypsum (calcium sulfate). It is an essential element, as all living cells contain sulfur.
Next time you will plant tomatoes, never forget that it has a sulfur friend...