am 
and State officials. The small—grain crops being harvested in the south—- 
ern portions of the area have been but Slightly if at all damaged, and 
fields which were seriously infested two weeks ago and were being badly 
Stripped of foliage, with indication of Serious crop losses, have filled 
Out with grain and promise satisfactory yields. In the northern portion 
of the area—-North Dakota and Minnesota——the campaign of poison distribu— 
tion, under effective organizations, has been very Successful, and State 
officials are confident that the harvest of small grains—-still ten days 
to two weeks distant--will not suffer material losses. 
Control by these natural agencies of disease and parasitism has 
been repeatedly indicated as a possibility. The common type of grass— 
hopper disease is reported ag appearing widely where conditions of 
moisture or humidity are favorable. Some 25 to 30 diseased and dead 
grasshoppers are reported from Iowa, for example, as often being found 
Clinging to a single stalk. The reverse of the conditions favorable 
to disease, namely, heat and dryness, is favorable to parasitism. These 
two control agencies, therefore, supplement each Other, and there is a 
high probability that control by these factors will extend and increase 
in amount throughout the principal grasshopper areas in the five or more 
states chiefly concerned. 
Luxuriance of roadside and grassland vegetation has, however, 
been the most important factor in lessening the damage threatened early 
in the season by holding the grasshoppers in or near their breeding areas 
and thus protecting the small-grain crops. The almost unprecedented 
rainfall during May and June, particularly in northwestern Iowa, South 
Dakota, and northern Nebraska, is responsible for this favorable condi- 
tion over much of the area, and this is notably true in South Dakota, 
where very little poisoning has been possible. 
The two-striped grasshopper, perhaps the most important of the 
three or four kinds concerned in the general area, is now practically 
all winged and the others are rapidly reaching this stage, but so far 
there has been very little migration to corn, and such migration now 
represents the major future risk.--C. L. M. 
Federal quarantine on European corn borer revoked.--On July 15 
secretary Hyde announced that he had revoked the domestic European corn— 
borer quarantine and regulations effective July 15. The Secretary stated 
that this action was taken because of "the failure to obtain funds suf- 
ficient te maintain effective control." The announcement also stated, 
"Revocation of Federal regulations will give uninfested States an oppor— 
tunity to issue such orders as they may feel necessary for protection 
against the introduction of infestation. The appropriation will enable 
the department to continue scouting to determine the limits of distribu-— 
tion of the borer. States outside the infested area will thus be able 
to Keep informed as to the areas to which any State restrictions should 
apply and infested States will know the territory in which suppressive 
measures are needed." This statement is included in the Monthly Letter in 
order that the information may be available to all members of thse Bureau. 
