14 Farmers’ Bulletin 1140. 
structive grasshopper, especially in California, seldom migrating far 
from alfalfa fields, where it breeds in abundance. 
The poisoned bran mixture applied early in the season along edges 
of the field, and later over the entire fiel 
Fic. 10.—Grasshopper injury to fruit tree. 
d, has given excellent results. 
Lightly infested fields may 
be cut so as to leave strips, or 
lands, of standing alfalfa to 
attract and concentrate the 
grasshoppers. They can 
then be poisoned at a com- 
paratively small cost. The 
grasshoppers usually roost 
on the alfalfa stems during 
warm nights, feed early, and 
descend to the ground as the 
heat of the sun becomes in- 
tense. They feed ravenously 
in the late afternoon follow- 
ing a hot day. The best re- 
sults therefore are secured by 
spreading the poisoned bran 
mixture on fields with stand- 
ing alfalfa in the afternoon 
of hot, dry days. 
CONTROL IN ORCHARDS 
AND VINEYARDS. 
Orchards (fig. 10) and 
vineyards suffering most 
severely from grasshopper 
attacks are those bordering 
on or within the radius of 
grasshopper migration from 
infested alfalfa fields, foot- 
hills, or waste areas. Grass- 
hoppers do not deposit their 
eggs in the loose soil of care- 
fully cultivated orchards. 
Uncultivated fence lines or 
roadsides may, however, be 
a source of infestation. Every effort should be made to poison the 
grasshoppers before they enter the trees 
or vines. If they are already 
present in the orchard, the poison should be spread over the ground 
and the grasshoppers shaken from the branches and kept moving so 
Eee rl rele 
