To meet the needs of the world's ever-growing population, an increase in crop production is essential. Radiation has helped to enhance the productivity and efficiency of the world's agriculture industry mainly in two ways, genetic improvements and pest control: Genetic improvements
The food that we eat, including cereals, green vegetables and fruits are all selectively means that only plants with desirable characteristics are chosen and developed. With the help of radiation, the traditional method of selective breeding has been greatly improved. By exposing the reproductive parts of crops such as the pollen grains or ovaries, or the whole plant, to a certain dose of x-rays or gamma rays, genetic mutations are induced. Although most of the induced mutations are harmful, very few of them are advantageous. Those mutated crops with desirable characteristics may be used immediately or may be further improved by crossing with existing varieties. More than 1,000 kinds of crops in daily consumption are developed using radiation-induced mutagenesis, including barley in Europe, rice in California and durum wheat in Italy.
Pest Control Pests, which cause drastic damage to crops, have been a big problem to farmers. By rearing pests artificially and exposing them to radiation, sterile pests, which are healthy in all other aspects, are developed. These sterile insects are then released to the area to be treated, when the sterile population will mate with the wild population, resulting in a reduction in the number of offspring. This method is proved successful in controlling the population of Mediterranean fruit fly, the screwworm fly in Florida and the Southern part of America, and the tsetse fly in Africa. *back* (C) 1999 ThinkQuest Team 27954