394 



THE MONTHLY BULLETIN. 



A private individual should not attempt to fumigate, unless he has 

 had experience along this line, as the work is of a dangerous charac- 

 ter if handled by an inexperienced person. Besides, the apparatus 

 necessary in fumigation is somewhat costly and may be out of the 

 , reach of a single grower's pocketbook. However, if the private 

 individual who is inexperienced along this line decides to work 

 by himself, he should read Circular 129 of the University of Cali- 

 fornia, entitled The Control of Citrus Insects, by H. J. Quayle, 



FUMIGATION OF CITRUS TREES IN CALIFORNIA. 



SOSAOE SCHEDULE i FOB SODIUM CYANID 128-130 i (DOS&OES ABE IN OOHCES). 

 BY &. S. W00LT7M, SPECIAL AOSNT. 



Tttla8ch(<dale Is recommcaded for eonoral a»e asalnat tbe HEO. TELlttW. HL*i-li. and pirplb ftcalee. * 



Wb*n as iDfMIUloB of prflt vtU li K*cn, laemH tbJi ■cbtdal* W 



Fig. 81. — Fumigation dosage scliedule 3, No. 1, for sodium cyanide. (After 

 R. S. Woglum, Bur. Ent., U. S. Dept. Agric.) 



several bulletins by R. S. Woglum, of the IT. S. Department of Agri- 

 culture at Washington; also pages 318 to 336 of the first edition of 

 Injurious and Beneficial Insects of California, by E. 0. Essig, and 

 pages 482 to 495 of the second edition of the same bulletin, both 

 publications of the State Commission of Horticulture. 



On deciduous fruit trees and olives spraying is efficient, and the 

 spray should be applied before the scales have become half grown, 

 with either water distillate caustic soda mechanical mixture, distillate 

 oil emulsion, crude oil emulsion, or miscible oils. The formula for 

 the water distillate caustic soda mechanical mixture is as follows : 



Water 200 gallons 



Caustic soda (95 per cent) 7 pounds 



Distillate (28 degrees Baume) 10 gallons. 



