Females can lay eggs three to four weeks after becoming adults. The average female lays one egg mass but production of two egg masses in not uncommon. A female southern green stink bug could lay as many as 260 eggs over her life span. The southern green stink bug has piercing-sucking mouthparts. The mouth consists of a long beak- like structure called the rostrum.
Salivary fluid is pumped down the salivary duct and liquefied food is pumped up the food canal.
All plant parts are likely to be fed upon, but growing shoots and developing fruit are preferred. Attached shoots usually wither, or in extreme cases may die. The damage on fruit from the punctures is hard brownish or black spots. These punctures affect the fruit's edible qualities and decidedly lower its market value. Young fruit growth is retarded and it often withers and drops from the plant.