Supervised control of insects: Utilizes parasites and predators and makes chemical control more efficient

Supervised control of field crop insect pests was first developed on the northwest side of the San Joaquin Valley. For three years it has been in successful operation in connection with the control of the alfalfa caterpillar, and has been expanded to the control of other pests on alfalfa and to pests of cotton. Supervised control has not been developed for such crops as deciduous and citrus fruits or truck crops. It has its possibilities on other crops but the necessary entomological information either has not been developed or has not been tested for a local supervised control district.