Kind of Buds 



Date 



Num- 

 ber 

 Buds 



Percent- 

 age 

 Killed 



Num- 

 ber 

 Buds 



Percent- 

 age 

 Killed 



Slowly to -16.5° C. 



Rapidlyto-11.5°C. 



Rice's Seedling peach 



Elberta peach 



Jonathan apple 



Montmorency cherry 

 Chabot plum 



Elberta peach 



Elberta peach 



Elberta peach 



Mar. 

 Mar. 

 Mar. 

 Mar. 

 Mar. 



24/13 

 24,'13 

 24,'13 

 24,'13 

 24/13 



145 

 170 

 39 

 166 

 191 



57. 

 82.9 

 46.2 

 76.5 

 100.0 



158 



86 



40 



189 



176 



53.2 

 75.5 

 70.0 

 59.2 

 73.8 



Slowly to -16° C. 



Nov. 3,'10 



382 



Slowly to -16.5° C 



Dec. 7/11 



150 



Rapidly to -12.5° C. 



77.8 



188 



69.1 



Rapidly to -16° C. 



1.3 



200 



Slowly to -16.2° C 



100.0 



Dec. 7/11 



210 



Rapidlyto-16.5°C. 



14.8 



150 



96.6 



Table 20a. Showing Effect of Slow and Rapid Temperature 

 Fall on Freezing to Death of Plant Tissue. 



Table 20b. Showing Effect of Slow and Rapid Temperature 

 Fall on Freezing to Death of Plant Tissue. 



Kind of Buds 



Date 



Num- 

 ber 

 Buds 



Percent- 

 age 

 Killed 



Ben Davis apple 



Ben Davis apple 



Ben Davis apple 



Ben Davis apple 



Jonathan apple 



Early Richmond cherry. 

 Early Richmond cherry. 

 Montmorency cherry . . . 

 Early Richmond cherry . 

 Montmorency cherry . . . 

 Cherry 



Jan. 

 Jan. 

 Feb. 

 Feb. 

 Jan. 



Jan. 

 Jan. 

 Jan. 

 Feb. 

 Feb. 

 Feb. 



18/12 



19/12 



2/12 



3/12 



18/12 



18/12 

 19/12 

 19/12 

 9/12 

 10/12 

 15/12 



Rapidly, +20° C. to -17° C. in 45 minutes 



Jonathan apple 



Vermont Beauty pear. 

 Chabot plum 



Feb. 

 Feb. 

 Feb. 



20/13 

 20/13 

 20/13 



40 

 47 

 60 

 82 

 35 



272 

 200 

 178 

 252 

 195 

 132 



20 

 25 

 28 



50.0 



36.2 



0.0 



2.44 



48.6 



98.6 

 100.0 



87.0 

 100.0 



94.8 



38.0 



100.0 

 100.0 

 100.0 



