Increased yield of plants by seed treatment with the neonicotinoid compound.

A process for increasing the yield and / or vigor of an agronomic plant grown from a seed comprising a sequence of external polynucleotides encoding performance of an insecticidal protein, or a sequence of external polynucleotides which provides herbicide resistance, or both, which process comprises: a. determining whether the seed is to be planted in a location having a level of insect pest infestation that would indicate treatment of insecticide; and, if such treatment is not indicated, b. carrying out an action that is selected from the group consisting of: i. treating the seed with a neonicotinoid compound, and ii. sow location a seed that has been treated with a neonicotinoid compound.