FUMIGATION OF CITRUS PLANTS. 



EXPERIMENT 2. 



Condition during fumigation, shade, 67°-69° F. 



Dosage, 1£ ounces KCN. 



Date, March 15, 1915, 9.30-10.30 a. m. 



Plants in each test, 2; total, 18. 



Remarks: Plants somewhat hardened. 



Results. 



Condition after fumigation. 



Condition before fumigation. 



Dark, 

 55° F. 



Shade, 

 67° F. 



Sun, 

 75° F. 



Dark, 55° F. 1 



1 

 1 



2+ 



1 

 1 



2+ 



3 

 3 



5 



Shade, 70° F. 2 



Sun, 75° F. 3 





1 Temperature 55°-57° F. throughout day. 



2 Maximum shade temperature during day, 80° F., at 1.30 p. m. 



3 Maximum sun temperature during day, 86° F., at 1. 30 p. m. 



EXPERIMENT 3. 



Condition during fumigation, shade, 57°-58° F. 



Condition after fumigation, shade, 59°-66° F., for 24-hour period. 



Dosage, 1 ounce NaCN. 



Date, September 28, 1915, 7.10-7.50 a. m. 



Plants in each test, 5; total, 15. 



Results. 



Condition before fumigation. 



Shade, 56° F.i Shade, 90° F. 2 Sun, 60° F 



1 At cool temperature several hours before fumigation. 



2 At temperature 88°-90° F. for 1 hour before fumigation; previously at 56° F. 

 ' In sun for 1 \ hours before fumigation. 



EXPERIMENT 4. 



Condition during fumigation, shade, 63° F. 

 Condition after fumigation, shade, 88°-90° F. 

 Dosage, 1 ounce NaCN. 

 Date, September 28, 1915, 9-9.40 a. m. 

 Plants in each test, 3; total, 12. 



Results. 



Condition before fumigation. 



Shade, 67° F., 

 plants wet. 1 



Shade, 67° F., 

 plants dry. 



Sun, 72° F., 

 plants wet. 1 



Sun, 72° F. 

 plants dry. 



3 



3 



3 



4 



1 Plants thoroughly sprinkled with tap water before fumigation. 



