For a full description of pests and diseases and prevention and controls click over to the Pest Problem Solver of the Disease Problem Solver. For tomato growing details click to How to Grow Tomatoes. Here are 35 tomato plant problems and solutions: Small holes in leaves of seedlings. Flea beetles eat small holes in the leaves of seedlings and small transplants. In worst case, the entire plant is destroyed.
A drop of water is equal to 0.050 milliliters. The unit used to represent a drop of water is 1 gtt metric.
There is around 15 to 20 drops in one ML. The liquid viscosity will  change this answer.    You may consider that there is 80 to 100 drops in a 5ml bottle.