THE BROAD-BEAN WEEVIL. 7 
The damage according to the different horse-bean regions is shown 
in the following table : 
Table III. — Summary of the 1916, 1917, and 1918 crops of broad beans showing 
the percentage of weevil infestation by localities. 
. 1916 
infesta- 
tion. 
1917 
infesta- 
tion. 
1918 
infesta- 
tion. 
Sacramento: 
Per cent. 
41 

9.09 
50 

14.5 
55 

13.6 
70 

24 
Per cent. 
63 

12.7 
63 

14.5 
56.6 
.5 
10.9 
46 
1 
16 
Per cent. 
84.3 
1 
22.4 
Ocean o-Morro: 
17.2 

2.92 
Halfmoon: 
Maximum 
56 

16.8 
Gilroy: 
Table II shows that of the entire crop of broad beans for the three 
years 1916, 1917, and 1918, 31.21, 18.01, and 43.08 per cent, respec- 
tively, were above the 15 per cent limit of weevil infestation allowed 
by the Bureau of Chemistry, and therefore could not be shipped un- 
less hand picked. Table III shows that even the average percentage 
of infestation for the entire 1916 crop in the Halfmoon and Gilroy 
regions was above the 15 per cent limit, while the same is true of the 
Sacramento and Halfmoon districts for the 1918 crop. This table 
also shows some interesting data on the increase in infestation. 
Sacramento is a comparatively new district for raising broad beans, 
and at first the weevil infestation was low, but as planting continued 
from year to year, and the acreage increased, the percentage of in- 
festation greatly increased, going from a maximum of 41 per cent 
in 1916 to 63 per cent in 1917 and 84.3 per cent in 1918, while the 
average percentage of infestation for the same years increased from 
9.19 to 12.7, and then to 22.4 per cent. Climatic conditions at Sacra- 
mento are adverse to late planting, and early planting as practiced 
there is favorable to heavy weevil infestation. Unless control meas- 
ures are practiced, and only uninfested or treated seed is planted, this 
district soon will be in the same position in regard to the production 
of horse beans that Alameda County has been in for some years. The 
low percentage of infestation in the Oceano-Morro district for the 
year 1918 will be explained later. 
Estimates from bean brokers on the reduction in value of broad 
beans from the infestation of the weevil vary from 25 per cent to 
total unsalability, depending on the degree of infestation. 
