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Cotton leaf worn was spreading during the early part of August and threatens 
late fields and top cotton over much of the Cotton Belt. 
General moderate damage "by hollworm is reported throughout the Cotton Belt. 
Serious injury to cotton By red spiders is reported from- the Carolinas, 
Mississippi, and Arkansas. 
Fall wehworn numerous in the New England States, South Carolina, Mississippi 
Ohio, and Minnesota, 
An outbreak of the saddled prominent also reported from New Hampshire, Ver- 
mont, and northern Ne\\r York, 
Complete defoliation of several thousand acres by forest tent caterpillar 
was reported from Nevj York State, but in most of New England and in Minnesota the 
recent outbreak has subsided. 
Elm leaf beetle generally prevalent throughout New England and the Middle 
Atlantic States, 
Heavy outbreaks of the larch sawfly are reported from New England, 
Locust leaf miner severely browning the leaves of black locust from 
Pennsylvania southward to Tennessee, 
A severe outbreak of the pine tube moth is reported from West Yellowstone, 
Wyo, 
THE MOHE IMPOiBidlT PHITUEES IN CAIIADA FOR JULY AND AUGUST 
In tho Prairie Provinces the heaviest grasshopper infestations developed in 
southv/est Saskatchewan and, southeast Alberta, In the former region grasshoppers 
were particular Ij?- severe over 1,200 square miles in tho Claydon-Robsart-Govanlock 
area, where all crops were corapletely destroyed and pastures heavily damaged. 
Elsewhere in Saskatchewan, except locally, the infestation appeared to be lighter 
than usuaA, Tlie most important species in Saskatchewan this season is the lesser 
migra,tor;/ grasshopiDor, In southeastern Alberta crops x-iere seriously damaged and 
most of tho stubble croj)s were destroyed. Migrations began in July from south- 
west Saskatchewan in a north .and northeasterly direction, and from southeast 
Alberta toward the north and northwest. In Saskatchewan the concentration of the 
flights had evidently been greatly reduced by the enormous numbers of grasshopiDer 
poisoned and, although grain heads, particularly oats, were being cut to a con- 
siderable extent, this type of damage was, on the whole, much lighter than in 
recent years. In Alberta by mid-A-Uegust the migrating grasshoppers had spread 
over much of the southern part of the Province a,nd were beginning to da-mage oats 
and barley. In Manitoba a build-up in the grasshopper population over 1939 
indicated and considerable poisoned bait wa,s distributed, Moderate-to-severe 
injury to grain crops occurred locally in July and in some districts oats were 
cut early to ]pr event further damage. Surveys of adult grasshoppers in the first 
half of August showed a general increase in the infestation, some flights and 
