JOURNAL OF ECONOMIC ENTOMOLOGY 



OFFICIAL ORGAN AMERICAN ASSOCIATION OF ECONOMIC ENTOMOLOGISTS 



APRIL, 1919 



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Our most important farm crop is threatened with very serious injury 

 by a recently introduced insect. This pest has a bad record in Europe- 

 It has demonstrated in this country its abihty to cause very great losses 

 when allowed to multiply unrestrictedly and its known distribution 

 indicates an ability to maintain itself throughout our corn belt. Fur- 

 thermore, studies conducted during the last two seasons in the infested 

 area in Massachusetts have resulted in finding no really satisfactory 

 method of control. This recent introduction appears to have become 

 established in only a few relatively limited areas. 



The European corn borer is unquestionably a serious menace to our 

 enormous corn areas and to some related crops, particularly Kafir 

 corn. Its natural spread appears to be slow, though evidence at hand 

 indicates at least two and possibly more commercial jumps, which 

 mean the establishment of the pest in centers remote from other in- 

 fested areas and in some sections at least where natural agents of 

 dissemination, such as flood waters, may prove a most important factor 

 in carrying the insect into new territory. The situation is further 

 complicated by the occurrence of the pest in badly infested areas in 

 the stems or stalks of a variety of garden vegetables, a number of 

 grasses and common weeds, the latter greatly increasing the difficulty 

 of control or extermination. 



The situation is a critical one. The insect is injurious, not easily 

 controlled and the feasibility of extermination has yet to be demon- 

 strated. Nevertheless, the spread of the insect through both natural 

 and artificial agencies is continuing and very soon its dissemination 



