229- 
Littlc movoncnt of grasshoppers into crops has occurred and practically 
no crop doj-iagc. is in evidence. Hatching of grasshoppers is practicedly 
conplctc, M, noxiemus is doreinant end conpriscs 75 percent of the 
poi^ulations in the nojrgins of snodl— grain fields. In other cnviroiincnts, 
Mi noxicnius , Aeolopl.us turnhullii Ihos,, M. packardii , and M. hivittatus . 
are about equedly divided in lumhers, M<argin-al populations average 75 
per square yard in gredn, \irhile field populations average less then. 5* 
Inspections in Ochiltree, Hansford, Hohorts, and Gray Counties, in the 
northern lexas Panhandle, indicate M, nenicanus to ’'bo the dominant 
species, naleing up 9“ percent of the n,nf estations with poimladions 
along roadsides and field margins nunihoring from 100 to 200 per square 
yard. In the more southern counties of northwestern lexan, Branhygtola 
• magna Gir, , the giant lubber grasshopper, is the dominant -spocios, with 
M, differ out iadis next in importance. Damage by these two species was 
occurring to young cotton plants in locadizcd areas. 3, magna is 50 
percent adult, This species ihich hatched on range laiads has m.ovcd 
into adjasont cottonfields as grasses began to dry, 
iJ 
Oklahoma., (June g-l4) : Survey of Bca.ver, Harper, and Texas Counties, 
in the Oklahoma Panhandle, showed the ha.tch to bo complete and reveaded 
light to threatening infestations in the smadl-graoin areas, M, mexi canus 
is the dominant species, comprising 60 percent of the populations in 
areas where grain is the chief crop. In Harper County about I 5 percent 
of them are adults. Migrations of M. mexi canus have been general into 
grain from adjacent margins and idle fields; however, damage has been 
confined to stripping of leaves and little head damage is noticeable. 
Populations a.vcragc about I 5 por square j^ard in smadl-grainf iolds and 
50 por square ya.rd along field margins, Hca.vicr inf csta.tions than wore 
e:jqpected earlier in the season a^re developing v;ith a possibility of 
considorahlo d'^xiagc to crops and general, light flights of M, mexi canus 
from the area., iEhmg’iis disca.se has reduced the A, turnbullii popula.tion 
a.bout 30 percent throughout the Panhandle a.rca and is still a.ctivc. 
In the soutlwostcrn Oklahoma counties the ha.tch is complete, with 
bivitta.tus, the dominant species, representing 35 percent of the 
populations, while A. turnbullii comjprises 25 percent and M, mexi canus 
20 percent. Adult M. bivitta.tus were observed June 12, Field populaj- 
tions seldom range higher than 10 per square ya.rd. Light ma.rginal 
damage has occurred a.long some cotton and a.lfa.lfa. field margins. 
Bottom lands and other low a.rca.s ha.vo been flooded severa.l times this 
S'oring, which apparently caused a reduction in gra.sshoppcr populations, 
Zansa.s, (June S— 14) : A survey in the southwestern Kansas counties of 
Morton, Sta.nton, Hamilton, Kearney, and Grant revealed a.n M, mexi canus 
infcsta.tion covering a.pproximatcly 500,000 a.cres. Inf csta.tion is not 
uniformly hca.vy; however, popula.tions average 25 per square ya.rd and in 
some ca.scs a.s high as 100 iDcr squa.rc yard, A largo percentage of grain 
fields a.rc infested, but. to da.tc there is no apparent dama.ge except 
to loaves, Gra.sshoppors a.ro 25 percent adults, A chock to determine 
the eastern extent of infcsta.tion revealed that, in general, the central 
counties of Jewel, Mitchell, Lincoln, Ellsworth, Rice, a.nd Stafford form 
the ca.stcrn boundary of the grasshopper infestation. Populations in 
these counties anc generally light, vhilc in the counties imi.icdia.tcly 
