178 



Missouri Agr. Exp. Sta. Research Bulletin No. 8 



Material 



;! ,^.>. 



Treatment 



Date 



Tem- 

 pera- 

 ture 



Number 



of 

 Plants 



De- 

 pres- 

 sion 



Early Harvest 



apple twigs 



and leaves... . iiui. onautu j uijr x, x^ 

 Pear twigs and | | 



leaves iShaded. . . . June 28/13 



Pear twigs and ' 



leaves 



Pear twigs and 



leaves ^i.-a.^^^^. . . . j uxn, ^u, x^ 



Pear twigs and I ! 



leaves Not shaded June 28/13 



Not shaded July 1/13 



Shaded.... June 28/13 



I 

 Not shaded June 28/13 



Shaded.... June 28/13 



-5.5 



-4 



-4 



-5 



-5 



46 

 25 

 28 

 25 

 26 



2.252 



Average, Shaded, excluding pears 



Average, Not shaded, excluding pears. 



.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 8.'13 

 July 8,'13 

 July 8,'13 

 July 8.'13 

 July 10,'13 

 July 10,'13 

 July 10,'13 

 July 10,'13 

 July 11, '13 

 July 11, '13 

 July 11,'13 

 July 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. 



27.2 

 35.3 

 100. 

 76.4 



0.0 



0.0 

 30.0 



0.0 

 10.0 



0.0 

 60.0 

 40.0 



34.53 

 25.29 



54.2 



58.8 



100. 



94.1 



2.5 



0.0 



30.0 



15.0 



25.0 



17.5 



80.0 



52.5 



48.61 

 39.65 



.695 

 .733 

 .695 

 .733 

 .755 

 .920 

 .755 

 .920 

 .835 



1.085 

 .835 



1.085 



.761 

 .912 



