In the early 20th century, the local textile industry began to decline, which had a significant impact on the local economy. The boll weevil adversely affected southern cotton crops in this period. During the late 1940s, air-conditioned mills opened in the southern United States, and jobs were lost as factories were moved south, where labor costs were lower because "right to work" laws weakened unions. Other industries also moved out of the city during a general restructuring in older industrial cities. New industries to rise in the city were electronics manufacturing (led by companies such as General Electric, which produced transistor radios), machinery and equipment, and food processing.