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general infestation* Linitccl ar.cas in vre.stern Montnna were experiencing 
difficultv with gra.sslioppors o.nd cone bait v/as spread as danago bccane 
appn,rent» 
Wyoning,^ (July SJ-Augiist 2): M, f enur-rubrun wo,s the c.oninajit species in 
the Big Horn Basin area end conprised J5 percent of the total po]puln,tion* 
Eo,rlier in the season, M. bivittatus ho,d been the dominant species* 
Approximately 50 percent of M, fomur-rubrui'.i v;oro in the fourth and fifth 
instara. Active oviposition by M, bivittatus v/as observed, 
. B. T. Snipes (Au,g*ust ll): Heavy populations of M, femur- rub rum still 
exist in Park and Big Horn Countios, v;hcre the gra.sshoppcr build-up is at 
its pealc. All s'pecies are considerably less numerous in other I'Jjoning 
counties. Small locaJ flights of M, nexicanus have been observed in 
Sheridan County, 
Idaho,'^ (July 27'-Au;gust 2); M, femur-rub rum is the dominant species in 
Cassia County, M, moxicanus is the dominant species in Gem, Ada, and 
Elmore Counties, v/horo threatening populations arc still present. Prac- 
tically all in the adult stage, (August 3~9)» Survey in Adams, Canyon, 
Gem, Payette, and ¥ashington Counties in v/estern IdaJio disclosed M, mexi- 
canus populations to a.verage 3 per square yard in all ^romus toct^rum 
range areas. Practically all were adults, 
UtaJi,^ (July 20-26); M, bivittatus , M, nexicanus , and M, packardii v/ore 
the species continuing to cause most of the dajnago in central, north- 
central, and south-central Utali, Approximately SO percent of the .grass- 
hoppers v;ore .adults. Severe marginal dofolia.tion of alfalfa v/as report- 
ed in many localities, in these sections of the Sta,te, Light to severe 
injuny to oats, sugan boots, sccond-grov/th alfalfa, berry, r.nd orchard 
crops was reported in various localities, (July 27-August 2): M, bivi- 
tta.tus x/as the dLominant sj)ecies in the irrigated sections of central and 
southv/estorn Utah, M, packardii and M, nexicanus predominated in the 
dnyland farming and benchland areas of the StaAe, Approximately 90 per- 
cent were in the a»dult stage. Severe damage occurred on alfalfa in Juab, 
Beaver, Millard, Salt LaJ^o, Davis, and Cache Counties, In the latter 
throe counties, genora.1 migrations of M, moxicanus occurred from range 
andu idle land into the more succulent cultivated crops. 
Hevada,,^ (July 20-26): With the exception of the BaJocr anca in White Pino 
County, crop d.araage in all a.reas v/as negligible. In the Baker area, 
some damn.go to socond-grov/th alfalfa, corn, andi. snaJl grains xi/a.s occur- 
ring, M, oocidLontalis in Hye and Lander Counties v/ere scattering and. 
oviposition generally in progress, A lange band, of this species, xr/liich 
originatcdi. this sprinm near IXinphy, Eureka County, v/a.s located north of 
Battle Mountain, the migration ha.ving covered some 35 to 40 miles this 
season. Egg r)ods averaging 12 q)er squane foot wore found over a 5“^'^il<3 
area in this district, (July- 27-Aufgust 2): One hundred and., tv/enty acres 
of alfa,lfa and oats in the Pilot area- of Elko County v.ras infested with 
• an arverage of 30 grasshoppers per squano ya.rd., M, packa.rdii , M, bivi- 
ttatus , and M, mexicarus \jctq the species involved, j 
library 
state plant board 
