TESTING GKAPE VAEIETIE8 IN" THE VHSTIFEBA REGIONS. 



11 



Table II.- — Temperature and rainfall at the twelve experiment vineyards of the Bureau 

 of Plant Industry in California — Continued. 



Minimum Temperatures (° F.). 



Vineyard. 



Jan. 



Feb. 



Mar. 



Apr. 



May. 



June. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



An- 

 nual. 





24 

 18 

 14 

 24 

 21 

 26 

 23 

 22 

 25 

 20 

 23 

 24 



29 

 20 

 19 

 25 

 21 

 26 

 24 

 24 

 23 

 24 

 27 

 24 



35 

 25 

 24 

 30 

 29 

 30 

 30 

 30 

 29 

 25 

 29 

 32 



38 

 30 

 25 

 34 

 30 

 32 

 30 

 33 

 29 

 26 

 27 

 36 



50 

 33 

 30 

 40 

 33 

 36 

 34 

 38 

 34 

 30 

 32 

 40 



52 

 40 

 34 

 42 

 37 

 39 

 39 

 43 

 36 

 34 

 34 

 40 



57 

 46 

 44 

 51 

 40 

 42 

 41 

 45 

 40 

 32 

 41 

 48 



60 

 48 

 38 

 52 

 39 

 42 

 41 

 44 

 39 

 34 

 34 

 42 



55 

 40 

 34 

 42 

 35 

 44 

 40 

 40 

 37 

 35 

 35 

 42 



40 

 34 

 24 

 36 

 30 

 39 

 34 

 31 

 30 

 27 

 32 

 36 



26 

 21 

 18 

 31 

 26 

 30 

 25 

 25 

 27 

 25 

 26 

 25 



20 

 22 

 16 

 24 

 23 

 26 

 23 

 21 

 24 

 17 

 23 

 20 



20 





18 



Colfax 



14 





24 





20 





26 





23 





21 



Mountain View 



23 



17 





23 





20 







Mean Temperatures (° F.). 





54.2 

 46.3 

 42.6 

 47.6 

 47.4 

 49.9 

 48.0 

 46.5 

 49.1 

 45.4 

 47.3 

 45.7 



54.3 



49.6 

 44.1 

 50.9 

 50.3 

 51.7 

 51.0 

 49.4 

 51.2 

 48.3 

 50.1 

 48.8 



62.2 

 53.0 

 46.3 

 55.4 

 52.8 

 54.7 

 53.5 

 53.1 

 53.3 

 50.4 

 51.7 

 52.5 



69.2 

 58.9 

 52.9 

 60.8 

 57.8 

 58.3 

 57.2 

 57.6 

 56.1 

 55. 1 

 55. 5 

 56.9 



76.3 

 65.3 

 59.4 

 66.4 

 62.4 

 60.7 

 60.5 

 63.0 

 59.0 

 59.7 

 59.4 

 62.1 



84.2 

 73.0 

 68.6 

 74.5 

 67.3 

 67.2 

 66.0 

 68.8 

 62.7 

 64.1 

 63.8 

 68.3 



89.5 

 79.4 

 75.1 

 81.8 

 69.8 

 75.2 

 70.9 

 72.9 

 66.0 

 66.8 

 66.2 

 73.2 



89.3 

 77.5 

 73.6 

 80.2 

 68.2 

 73.2 

 69.8 

 70.6 

 65.1 

 65.8 

 64.5 

 71.1 



83.4 

 71.4 

 65.7 

 73.1 

 67.0 

 69.9 

 68.3 

 67.0 

 64.3 

 65.1 

 64.2 

 67.8 



71.3 

 63.9 

 59.0 

 64.4 

 62.2 

 64.4 

 62.8 

 60.0 

 60.2 

 60.8 

 60.6 

 61.1 



60.9 

 52.8 

 51.6 

 54.3 

 53.9 

 56.5 

 54.5 

 51.5 

 54.0 

 52.3 

 52.9 

 51.6 



51.1 

 45.8 

 43.5 

 45.7 

 47.7 

 51.3 

 48.8 

 45.0 

 48.1 

 45.5 

 46.3 

 44.2 



70.4 





61.4 



Colfax 



56.9 





62.9 





58.9 





60.9 





59.3 





58.8 



Mountain View 



Oakville 



57.4 

 56.6 





56.8 





58.6 













Prectpitation (Inches 2 ). 













































6.41 

 13. 12 

 2.11 



11.08 

 6.05 

 4.55 

 5.02 

 4.47 

 8.07 

 6.80 

 4.24 



3.77 

 7.78 

 1.30 

 6.85 

 4.30 

 2.00 

 2.68 

 2.46 

 4.42 

 4.91 

 2.12 



5.46 

 11.02 

 2.24 

 9.49 

 6.40 

 3.75 

 4.71 

 4.45 

 6.57 

 6.02 

 3.62 



1.14 



3.00 

 .77 



1.40 



1.29 

 .65 

 .80 

 .80 



1.10 

 .74 

 .72 



0.96 



2.59 

 .58 



1.30 

 .93 

 .57 



1.56 

 .54 

 .78 

 .87 

 .68 



0.29 

 .95 

 .03 

 .45 

 .12 

 .19 

 .26 

 .18 

 .26 

 .25 

 .14 



T 



T 

 .001 



T 

 .02 



T 



T 



T 



T 

 .34 



T 



0.01 

 .002 



T 



T 

 .01 

 .03 

 .003 

 .04 

 .01 



T 

 .01 



1.03 

 1.14 

 .30 

 .96 



.44 

 .31 

 .40 

 .52 

 .78 

 .82 

 .48 



0.79 

 2.39 

 .56 

 1.59 

 .56 

 .43 

 .55 

 .51 

 .77 

 .83 

 .42 



2.03 

 4.98 



.72 

 3.88 



.87 



.90 

 1.14 



.96 

 2.10 

 2.75 



.99 



3.50 

 6.39 

 1.26 

 5.24 

 3.14 

 2.47 

 2.94 

 2.49 

 3.95 

 4.00 

 2.31 



25.39 



Colfax 



53.36 





9.87 





42.25 





24.13 





15.86 





20.06 



Mountain View 



17.42 

 28.81 





28.33 





15.73 







2 T=Trace. 



3 No data available. 



1 Data for four years. 



In the care and maintenance of the California experiment vine- 

 yards and in prosecuting researches in them, Mr. George C. Husmann, 

 Pomologist in Charge of Vifcicultural Investigations, is assisted by 

 Mr. Fred L. Husmann, Viticultural Superintendent, and Mr. Richard 

 Schmidt, Assistant in Viticulture. 



DESTRUCTION OF VINEYARDS. 



In Bulletin 172 of the Bureau of Plant Industry the writer gives 

 an account of the havoc wrought by the phylloxera insect to the 

 vineyards of the Old World as well as to those of the Vinifera regions 

 of this country. Since that bulletin was issued additional heavy 

 losses have occurred. 



The destruction in California of once flourishing vineyards cover- 

 ing more than 200,000 acres, through the so-called California vine 

 disease and other agencies, but most largely through phylloxera, has 

 already occurred. All that has been suggested to combat and eradi- 



