-30- 
' M3TH0DS 
Each sample consisted of all trash, alfalfa crowns, and soil to a 
depth of 2 inches inside a metal die 1 foot square. The volume of samples 
was- reduced by washing, so that weevils, parasite cocoons, and a small 
amount of litter remained in the lower of two sere en- hot torn tubs. Washed 
samples were wrapped in absorbent paper towels and, when dry, were examined 
in the laboratory. 
LIMITATIONS PIT US3 0? DATA 
A mean of two adults per square foot is considered necessary to produce 
economic damage in most of the older weevil-infested territory. However, the 
extent of damage in any locality is subject to modification by the character 
of the spring weather; that is, the severity of damage depends on whether 
the weather is favorable or unfavorable for weevil development. Field condi- 
tions, such as thin stands and poor growth, may also modify damage in any 
field and in any district where such conditions are prevalent, because fewer 
adults will produce the larval concentration necessary to cause damage. 
Furthermore, injury in any field having menacing numbers of adults is in- 
creased 'oy delay in cutting, owing to unfavorable haying weather or to inter- 
ference with other farm duties, after the plants are mature. This is indi- 
cated "oy the appearance of basal shoots and scattered blossoms. 
RESULTS 
Results follow according to States, accompanied by brief discussions 
of the areas surveyed and the extent of damage in 1936. The sampling data 
are tabulated by districts and each tabulation is accompanied by a brief 
interpretation* All averages have reference to areas of 1 square foot. 
oarso H 
Damage in Oregon last season was prevalent in Jaclcson County and in 
idagle Valley, Baker County; consequently these areas were surveyed in the 
fall. Although there was virtually no damage in Malheur County, some of the 
farmers thought that the weevil might be building up to damaging populations 
again. For this reason Malheur County was also surveyed, being treated with 
JJagle Valley as one district. 
Ba^le Valley. Baker County . — Adult populations were small indicating 
only slight damage next season. Only three fields showed populations of one 
or more adults, which normally would not be sufficient to cause damage, but 
in this area slight injury may occiir in the hillside fields, owing to thin 
stands and poor growth. Cocoons of 3. cur culionis were rather scarce but, 
in view of the rather small weevil populations this parasite promises to be 
