Material 



Treatment 



Early Harvest 

 apple twigs 

 and leaves... 



Pear twigs and 

 leaves 



Pear twigs and 

 leaves 



Pear twigs and 

 leaves 



Pear twigs and 

 leaves 



Date 



Not shaded July 1/13 

 Shaded. . . . June 28/13 

 Not shadedjune 28/13 



Shaded 



Not shaded 



June 28/13 

 June 28/13 



Tem- 

 pera- 

 ture 



-5.5 



-4 



-4 



-5 



-S 



Number 



of 

 Plants 



46 

 25 

 28 

 25 

 26 



Average, Shaded, excluding pears 



Average, Not shaded, excluding pears. 



Per- 

 cent- 

 age 

 All 

 Killed 



0.0 

 24.0 



0.0 

 80.0 

 15.4 



33.5 

 30.9 



Per- 

 cent- 

 age 

 Total 

 Leaf 

 Area 

 Killed 



16.3 

 74.0 

 36.6 

 95.0 

 63.4 



71.01 

 48.61 



De- 

 pres- 

 sion 



2.252 



.985 

 1.173 



In practically all cases the cortex, cambium and sap_ wood of the twigs were 

 injured rather severely, and in all cases the injury was worse with the 

 shaded twigs. 



In the case of the pear twigs and leaves sufficient sap for depression determina- 

 tion could not be secured. 



Material 



Treatment 



Date 



Tem- 

 pera- 

 ture 



Number 



of 

 Plants 



Per- 

 cent- 

 age 

 All 

 Killed 



Per- 

 cent- 

 age 

 Total 

 Leaf 

 Area 

 Killed 



De- 

 pres- 

 sion 



Labrusca grape 



leaves 



Labrusca grape 



leaves 



Labrusca grape 



leaves , 



Labrusca grape 



leaves , 



Labrusca grape 



leaves 



Labrusca grape 



leaves 



Labrusca grape 



leaves 



Labrusca grape 



leaves 



Labrusca grape 



leaves 



Labrusca grape 



leaves 



Labrusca grape 



leaves 



Labrusca grape 



leaves 



Shaded 

 38 hours 



Not shaded 

 Shaded 

 38 hours 



Not shaded 

 Shaded 

 22 hours, 



Not shaded 

 Shaded 

 22 hours. 



Not shaded 

 Shaded 

 22 hours. 



Not shaded 

 Shaded 

 22 hours.. 



Not shaded 



July 

 July 

 July 

 July 

 July 

 July 

 July 

 July 

 July 

 July 

 July 

 July 



8/13 



8/13 



8/13 



8/13 



10/13 



10/13 



10/13 



10/13 



11/13 



11/13 



11/13 



11/13 



-3 



-3 



-4.5 



-4.5 



-3.5 



-3.5 



-4.5 



-4.5 



-4 



-4 



-5.5 



-5.5 



18 

 17 

 22 

 17 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 



Average, shaded 



Average, not shaded. 



27 



35 



100 



76 







0, 

 30 





 10 





 60 

 40. 



34. 



25. 



54, 



58. 

 100. 



94, 

 2, 

 0, 



30, 



15. 



25. 



17. 



80. 



52. 



48. 

 39. 



.695 

 .733 

 .695 

 .733 

 .755 

 .920 

 .755 

 .920 

 .835 



1.085 

 .835 



1.085 



.761 

 .912 



