Figure 1.

Toxicity screening bioassay of lactone derivatives on Drosophila suzukii. (A) Mortality of D. suzukii adults caused by nine lactone derivatives at a concentration of 3 g/L. (B) Concentration–mortality curves for the two most promising molecules (i.e., compound (4) and (rac)-8). Adult flies were exposed through the ingestion pathway, and the exposure period was 24 h. Control C represents insects treated with sugar solution. Control C represents insects treated with sugar solution containing 2% dimethyl sulfoxide (DMSO).