.. -l^Or. 
GENERAL FEEDERS 
GRASSHOPPERS ( Ac r i di dae ) 
California. S. Lockwood (May 21): The sitxaation -over the.;en,tire . alfalfa 
region of the Imperial Valley continues to he serious, Chjthreak on 
approximately l65*000 acres of alfalfa entirely con 5 )os«d of M , mexicanus 
Sauss. This species is causing all the loss and is the ^dominant ;one in 
the Palo Verde Valley, around Blythe, Riverside County, where they 
have numbered as high as 50 per square yard of alfaXfa, They are now 
mating, and oviposition is expected within sl short time. The devas- 
tating grasshopper (M. devastator Scudd, ) and the valley grasshopper 
(Oedaleonotus enigma Scudd. ) are destructive to potatoes and water- 
melons in the cultivatedvareas around Temecula, Riverside County. - 
In some areas they have numbered 500 per square yard. . . M.; de va ^ ta t o r, 
is the principal species on the western side of Kern County, extending 
from Grapevine to Edison, although 0. enigma is also present. These 
species have numbered 200 per square yard in some sections, although 
this is considerably higher than the average. Infestations on the 
western side of Fresno County have not developed as expected. Egg 
hatch has been affected by adverse weather, and those that have hatched 
have been disposed of to a marked degree by above-ground predators. 
Grasshoppers are now developing in serious numbers in Humboldt County, 
south of Eureka, Two species of Melanoplus and one of Locustana have 
bOen observed in the outbreak there, 
B, M. Gaddis and assistants (May 12-18): Qferasshopper infestations 
continue to be serious in Kern, San Diego, Imperial, and parts of Merced, 
Humboldt, and Riverside Counties, Several heavy infestations in the 
Sacramento Valley are beginning to appear; however, in some areas of 
the Sacramento Valley and on the west side of Fresno County, many eggs 
have been destroyed. In the Ali so Canyon area of Orange County, mature 
Camnula ' peilucida and nymphs of enigma are sufficiently numerous 
to necessitate poisoning,, 
1 / ' 
Colorado, . (May 12«*18)t The hatch t h th^ Diasost^jra langipennie Thos»> area 
is about :50 percent complete, with 99 percent of the nymphs still in 
the first instar. It is evident as the hatch progresses, that egg beds • 
cover considerably more area than was expected from the fall egg survey. 
Week-old nymphs have spread until they cover about twice the area of 
the original beds; however no definite migrations are apparent as yet. 
Spotted infestations of M, mexicanus Sauss, are present on idle and 
abandoned land in Pueblo, El Paso, and Lincoln Counties, with some 
marginal populations running as high as 75 P®r square yard. In one 
coulee bottom 275 nyn^hs per square yard were found on an acre of land. 
In Boulder and Larimer Counties the infestations are jotted and 
generally not alarming, with field populations ranging from less than 1 
to 75 per square yard. The infestations are confined principally to 
^ Where no name is given after the State the report is by B, M. Gaddis 
and assistants. 
