WESLACO, Tex., Nov. 18 - It's a burning issue for some hot-pepper lovers: Whatever possessed Kevin M. Crosby to create the mild habanero? For Dr. Crosby, a plant geneticist at the Texas A&M Agricultural Experiment Station here near the Mexican border, the answer is simple: "I'm not going to take away the regular habanero. You can still grow and eat that, if you want to kill yourself." But for those who prize the fieriest domesticated Capsicum for its taste and health-boosting qualities, Dr. Crosby and the research station in the Rio Grande Valley have developed and patented the TAM Mild...