Nicotine keeps people smoking even though they are aware that it is bad for the health. This chemical causes addiction. The body gets used to ...The cultivation of tobacco usually takes place annually. The tobacco is germinated in cold ... cucumeris or Epitrix pubescens, which destroyed half the U.S. tobacco crops in 1876. .... Pesticide use has been worsened by the desire to produce bigger crops in less time because of the decreasing market value of tobacco.