Caterpillars ingest leaves sprayed with this compound and it will act as a stomach poison and kill them. It won't hurt you or other insects, so don't use this product if you are trying to kill aphids.
Sabadilla is both a contact and stomach poison and has shown greatest promise against several of the "true bugs," such as squash bug, chinch bug, harlequin bug and stink bugs.
How It Works: Bt is a stomach poison. It releases toxins in the stomachs of susceptible insects which cause them to stop eating and starve.
Pros: Bt strains are very host specific and will not harm people, pets, birds or bees ...
They are a contact and a stomach poison which are lethal to most insects. They break down quickly in sunlight. Derived from the flowers of Tanacetum cinerarifolium (pyrethrum-related to the tansy and feverfew.) ...
It contains an alkaloid known as veratrine which acts as contact and stomach poison for insects. It is used as a less toxic alternative to rotenone, although it can cause respiratory and eye irritation in mammals.
The larvae of a moth, budworms hatch from eggs laid on flower buds. The worms bore inside the buds and ruin the blossoms. Use the biological insecticide BT (Bacillus thuhagieasis), a caterpillar stomach poison, ...
 See also: Insect, Stoma, Insecticide, Larva, Plant
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