Arizona republican., 1920-01-02
CITRUS CULTURE. ID BE TAUGHT AT. SCHOOL JAN. 6-7
Comeback Farm Bureau Has Provided Program Which Will Be Held Out Of Doors If the Weather Permits

January 6 and are the dates an nounced for citrus extension school. The Comeback Farm bureau has se- cured the cooperation of the Arizona Orange association, the Arizona Fruit and Storage company and the Arizona Agricultural Extension service. The strongest program of speakers obtain able has been arranged for and the unique feature about the school is. that all the lectures will be held in groves, unless weather conditions are unfa- vorable. Instead of regular lectures, the program will be composed of demonstrations, the speakers promis ing to talk and work at the same time.
 Probably the most annoying prob lem of citrus growers is the minute in sect called citrus thrips. It has hitherto been thought that these insects were practically impossible to control, but work done by the State Entomologist office in the Salt River valley and by the United States Department of Agriculture indicates that much can be economically done to prevent thripS damage. About four sprayings are given at different times during the growing season, the basis of the spray being lime sulphur.
 Spraying Demonstrations
 Dr. Oscar c. Bartlett, field ento- mologist for Arizona, promises to at tend to the thr45 Is and spraying demon strations. Dr. Bartlett is well known over the state sas a man well versed not only in insects but in types of spraying machinery best adapted for differeQt classes of work. Bartletts demonstrations will include methods of control of thrips, best types of spray ing machinery and adjustment of spray noZzles. It is planned to have modern power sprayer of the best type or exhibition during the citrus school.
 Prof F. J. Glider, horticulturalist of the University of Arizona, will conduct pruning demonstration. After his work and discussion he will throw the meeting open for an exchange of ideas concerning pruning. He will also dis cuss cover cropping in orchards. dwelling on the effects with different cover crops and at different times of the year. A special feature of his part of the program will be a discussion of the behavior of different varieties of cow peas in the Salt River valley. the experience of most growers being limited to the whippoorwill and black eye varieties.
 To Discuss Citrus Diseases
 D. c. George, plant pathologist with the state entomologists office, will discuss citrus diseases, dealing particH larly with gumosis and chlorosis. two diseases concerning which very little has been known.
 c. J. King of the federal bureau Of plant industry. will speak of experi- ences he has had in fertilizing citrus trees King promises to shed some light on Trench Feeding Versus Pasturing" citrus trees.
 D. A. Gilchrist, in charge of rodent control work of the Bureau of Bio- logical Survey in Arizona, will discuss the killing of gophers. These pests hit citrus growers harder than any other farmers of the valley and Gilchrist will outline plan whereby. with proper CO., operation on the part of growers, it is hoped to entirely rid the citrus dis tricts of gophers. The Camelbacl1 Farm bureau is to be congratulated for securing such an excellent pro- gram.