There are many species of aphids. The aphids on tobacco plants in the US do not die from nicotine ingestion. They actually adjust their feeding rate (how fast they suck the juice from the plant) to keep their nicotine intake tolerable. That is one reason they usually begin their foray on young, tender leaves and suckers. Prompt removal of small suckers reduces the aphid burden.
Neonicotinoids (like imidacloprid) kill by the same mechanism, but are far more potent than natural nicotine.
Bob
Neonicotinoids (like imidacloprid) kill by the same mechanism, but are far more potent than natural nicotine.
Bob














