Brown marmorated stink bug (BMSB) is a newly invasive stink bug pest of several crops in the United States. As of my knowledge so far, this pest has not been found in any crops in California, although 8 Counties including San Joaquin and Stanislaus have a reproductive population of this bug mainly in urban areas. Want to learn more about this bug? Below is the link for my article about BMSB (look up page 2).

http://cesanjoaquin.ucanr.edu/newsletters/Field_Notes_Newsletter61902.pdf