The industry that mass produces beneficial arthropods has 3 major concerns—(1) cost-effective mass production, (2) profitable sale, and (3) successful use of its products. This overview of commercially available heteropteran species gives examples of problems that must be overcome in the use of various species—diapause, supplemental food needs, application rate determination, susceptibility to other predators, and cannibalism. Continuing sales require predators of good quality and successful application, goals shared by the International Organization for Biological Control (IOBC) Working Group for Quality Control of Mass-Reared Arthropods and the Association of Natural Biocontrol Producers (ANBP) Developments toward these goals are as follows: (1) IOBC Quality Assurance Guidelines, and (2) development by ANBP of standard product profiles as models of factual information to be included with shipments. Given a reliable supply of good-quality predators, the most critical need in the field is timely estimates of pest densities and predator/prey ratios and techniques to estimate timing and numbers of beneficials to release. Other needs are included in 2 lists generated by ANBP members—factors limiting growth of the industry, and the relative importance of factors that influence the successful outcome of field trials.