Antifeedant Mechanism of Saponin A Isolated from the Seeds of .

is a medicinal plant which has been used to treat various diseases in humans. However, the anti-insect activity of extracts from has not been evaluated. Here, we found that the total saponins from (TSDV) had strong antifeedant and growth inhibition activities against 4th-instar larvae of .

Nematicidal activity of tirotundin and parthenolide isolated from and .

Acetylcholinesterase (AChE) is an enzyme that catalyzes acetylcholine into choline and acetic acid. Conventional pesticides, including organophosphates and carbamates target and inhibit the activity of AChE. To obtain more pesticide precursors that meet the safety requirements, more than 200 compounds were screened.