24 



pronounced in 1903 than in 1904. This was due not only to the more 

 favorable weather conditions for bollworms during- late July and 

 August, but to the general lateness of crops, due to an unusually wet 

 spring, which ever}^ where delayed planting from three to five weeks. 

 The following estimates of bollworm injury to cotton in several 

 counties of Texas during 1903 have been made from all obtainable data, 

 including personal investigations, and will illustrate the possibilities of 

 injury of this species under exceptionally favorable conditions: 



Table II. — Estimated bollworm injury in certain counties of Texas in 1903. 



County. 



Percentage 



of crop 

 destroyed. 



County. 



Percentage 



of crop 

 destroyed. 



Navarro 



20 to 25 

 15 to 20 

 20 to 25 

 8 to 10 

 8 to 10 

 15 to 20 

 50 to 60 



Lamar 



40 to 50 



Henderson 



Delta 



50 to 60 





Hunt 



30 to 35 



Falls 



Hopkins 



25 to 30 



Bell 





25 to 30 



Robertson 



Van Zandt 



20 to 25 



Fannin 











It should not be understood that injury was confined to these coun- 

 ties. The injury, in fact, was quite general over the principal cotton- 

 producing counties of the State. Likewise in Louisiana, Mississippi, 



Fig. 1— Map of area infested by bollworm (from Quaintance and Bishopp). 



Indian Territory, and Arkansas bollworm injury was very severe. 

 The area most seriously injured in 1904 is shown by the shading in the 

 accompanying illustration (tig. 1). 



From evidence collected and from personal investigation it is believed 

 that an average annual injury of 4 per cent to the cotton crops of the 



