Brown marmorated stink bug ( <i>Halyomorpha halys</i> ) feeding damage determines early drop in olive crops

The brown marmorated stink bug (BMSB), Halyomorpha halys Stål, is an invasive species and a polyphagous pest. BMSB feeding activity was suspected to be responsible for olive damage. To evaluate the effect of damage from adults nymphs BMSB, 30 rearing sleeves were positioned in grove, at early stage drupe development. individuals kept 48 h, number olives each sleeve checked weekly, visually assessing signs measuring their volume. After 48-hr exposure, dropped significantly higher containing compared with control, visible volume still attached lower adults. These results provide key evidence on developing olives. If numbers keep increasing Mediterranean regions (where most production occurs), actions should taken prevent economic losses.