FUMIGATION OF CITRUS PLANTS. 13 
EXPERIMENT 14. 
Condition during fumigation, dark, 91°-92° F. 
Dosage, 1; ounces KCN. 
Date, March 15, 1915, 1.30-2.30 p. m. 
Plants in each test, 2; total, 22. 
Remarks: Plants were in a somewhat resistant condition. Temperature of the 
fumigatorium 80° F. when plants entered, being raised immediately to 90°-91° F. 
before fumigation, and thus maintained throughout the exposure. 
Results. 
Condition after fumigation. 
Condition before - 
fumigation. Dark, Shade, Shade, Sun, 
56° F.1 80° F.2 90° F.8 85° F.4 
Dank OGeee ee weet 2 8} abe 
Shade, SOcshas 22.2 3 3+ 3-+ 4 
Sun S6CHE Ee pace: 3 4 4 5 
1 Temperature uniform throughout day. 
2 Held at sun temperature. 
3 Temperature 85°-90° F. maintained for 3 hours after treatment. 
4 Temperature dropped to 75° F. 3 hours after exposure. 
-EXPERIMENT 15. 
Condition during fumigation, dark, 86°-91° F. 
Dosage, 14 ounces KCN. 
Date, March 18, 1915, 12.35-1.35 p. m. 
Plants in each test, 2; total, 30. 
Remarks: Growth asin experiment 14. Temperature of fumigatorium 73° F. when 
plants entered, being raised immediately to and maintained at 86°-91° F. during 
fumigation. 
Results. 
Condition after fumigation. 
Condition before fumigation. 
Dark, | Shade, | Dark, |Shade,} Sun 
63° F.1| 63° F.1| 91° F.2| 89° F.2| 77° F.3 
Dark 62° Eos ke 3 3 4 4 4 
Darien 900: Waa gaee eonate 3 3 4 4 4 
UL ye A dieser 48 oe ame et ae + 4 4 4 a 
1 Maximum temperature for 24 hours after treatment, 65° F. 
2 Temperature 86°-91° F. maintained for 3 hours after treatment. 
’ Temperature 3 hours after treatment, 69° F. Slight haze developed during afternoon and at 4.45 p. m. 
completely obliterated the sun. 
EXPERIMENT 16. 
Condition during fumigation, shade, 61°-63° F. 
Condition before fumigation, dark, 60° F. 
Dosage, 1 ounce NaCN. 
Date, September 22, 1915, 6.10-6.50 a. m. 
Plants in each test, 4; total, 20. 
Results. 
Condition after fumigation. 
Dark, 65° F.1 | Shade, 64° F.1| Dark, 73° F.2 | Shade, 70° F.2 
2 2 2 2 
Sun 73° F.2 
‘1 At cool temperatures throughout day. 
2 At equal temperatures throughout the day; maximum 102° F. at 2 p. m. 
