SUMMARY OF IXSECT CONDITIONS DURING 1921, 



39 



Isolated reports were received from Buncombe County, N. C, 

 Buchanan County, Mo., and Oktibbeha, Lauderdale, and Copiah 

 Counties, Miss. 



The map in Figure 20 indicates, by shading, the area of serious 

 infestation. The black dots indicate reports of definite localities 

 where exceptionally serious damage was sustained during 1921, while 

 the circles indicate localities from which reports of outbreaks have 

 be^n received in previous years. 



SEED-CORN MAGGOT. 



{Hylemyia cilicrura Rond. ) 



During the past season a rather remarkable outbreak of the seed- 

 corn maggot attacking the seed pieces of early planted potatoes oc- 

 curred along the Atlantic seaboard. 



Fig. 21. — Map indicating sequence of reports of destructive abundance of the seed-corn 

 maggot in the United States in 1921. 



Early in April the first report was received from North Carolina, 

 the outbreak being reported as both severe and extremely unusual, 

 50 per cent of the early planted crop in the Beaufort district having 

 been destroyed, many of the fields so seriously damaged as to neces- 

 sitate replanting, and others abandoned. The infested area in- 

 cluded the region bounded by a line extending along the northern 

 border of Dare and Tyrrell Counties, across the center of Bertie and 

 southeastern corner of Halifax Counties, thence southward across 

 Edgecombe and Wilson Counties, the western third of Greene County, 

 the middle of Lenoir County and eastward across the upper third 



