Reuters: Chinese solar cell maker JA Solar Holdings Co Ltd said on Wednesday the global economic slump had triggered a “panic” in the solar market, prompting it to slash its sales forecasts and sending its shares down more than 30 percent. Sales of solar cells and panels have risen sharply in recent quarters as companies such as JA Solar ramped up production of the clean power source, but the global economic slowdown has caused that growth to slow, leading to a supply glut. “At this …