-66i- 
protected frnn Mormon crickets by control Campaigns* Mormon crickets hatched in 
seme ere a? as early as the latter part of February and in other areas as late as 
the second ^'eek in June. Included among the natural enemies of the Mormon 
cricket are; The egg parasite Sparais on pilosum Ashm. ; the wasp predator 
Palnodes laeviyentris Cress.; an unidentified wasp; a s car aba&id larva, Aphodlus 
dent iculatus Hald. ;.sarcophagid flies; a round worm, Gordins sp.; spiders; 
reptiles; rats; nice; moles; badgers; coyotes;, dogs; scorpions; and many species 
of birds. Range rehabilitation in nary parts of the Northwest has been seriously 
handicapped by the crickets feeding on the flower heads and seeds of range plants. 
Grasses constitute over 20 percent of the recorded food plants, weeds about 65 
percent, browse plants about 15 percent, .and sedges and similar plants less than 
5 percent. Both egg and adult surveys were conducted during the latter part of 
the summer and in the fall of 1938 , to determine the intensity of infestation. 
The foil oaring table gives the infested acreage by States. 
Mormon. cricket infestation, fall of 1938 
State 
Acres infested (including agricultural lands) 
Heavy ; Moderate • Light : Total 
Colorado 
I daho 
Number « Number ' » Number : Number 
0 : 0 : 0 ; 0 
53,500: 130,120; 650,560: 834,180 
2,034,660: 2 . 670 . 245 ; 3 . 046 , 530 : 7.751 485 
Montana 
Nebraska —1 
0 : ' 0: 8 , 480 : * 8,480 
337 , 020 : 717,980: 1,223,328: 2,278,328 
0: 35,800: 535,800: 571,600 
37,120: 472 , 800 : 346 , 660 : 856,580 
6,900: 88,300: 1 , 943 , 800 : 2,039,000 
9,470: 13 , 030 : 148 , 221 : 170,721 
1,920: 98,900: 183,580: 284 , 4 oo 
. 311,240 : 490.430 : 2 . 022 . 516 : 2 . 824.186 
Nevada 
Oregon 
South Dakota 
Utah 
Washington 
Wyoming •••• 
Total 
2 , 791 , 830 ; 4,717,605; 10,109,525; 17,618,960 
I/in addition, 152,480 acres are very lightly infested. 
In addition, 1 , 147,900 acres are very lightly infested. 
ALFALFA WEEVIL 
Alfalfa. weevil populations, as determined by the 1937 fall survey, were 
generally more threatening than for several years. Damage was indicated in 4 o 
to 50 percent of the alfalfa fields in Box Elder County, Utah, and Jackson County 
Oreg.; m 17 to 33 percent of fields in Salt Lake and Sanpete Counties, Utah, the’ 
upper Snake River Valley of Idaho (Bingham, Bonneville, Jefferson, Madison, and 
Fremont Counties); Eagle Valley, in Baker County, Oreg.; Douglas and Washoe 
Coonties, Lev., and Delta and Mesa Counties, Colo. Weevil damage threatened to 
Vsi w ^ P6rc ! nt °^ 1 ® ss of fields Sevier County, Utah; the lower Snake River 
Coiitv’ ter ?c Ifeh ° ^ eastGrn Oro £on; Churchill County, Nev. ; Montrose 
County, Colo., .and Sioux County, Nebr. Actual developments in 1938 were .as 
lows: Severe damage occurred in 50 percent of fields in Douglas County Nev 
Sanpete Sr “if/W ^ ley ° f enstern 1 ^° and in 35 percent of those in*’ 
and a ! e lajUry affeoted 15 percent of fields in Box Elder 
and Uintah Counties, Utah; slight damage occurred in 25 percent of fields in 
