BREEDING RECORDS OF L906, 



21 



BOLL \\ BBVTL CHRONOLOGY. 



The boll weevil has been present in the United States since 1892. 

 Year 1)\ year it has extended its ravages, although during the sum- 

 mer of 1896 and the winter of 1904 5 it received severe setbacks. 



Its territory now extends into four States, and in three of these 

 observations as to parasitism were made. Several examinations 

 were made immediately after the dispersion of Augusl in newly 

 infested fields, and at Minden, La., it was actually found that para- 

 sit izat ion had commenced within two weeks of the weevil's arrival. 

 The parasites do not follow the weevil; they are already present and 

 native to the country invaded. Thus it is that in some parts of 

 Texas where the weevil has been present ten or more years the 

 parasites have not as great a hold as they have at Waco, which has 

 only had it four years. There are probably more sources for para- 

 sites at Waco than at other points. 



Table XIII. — Weevil chronology and -parasitism. 







Average parasitism. 



Locality. 



Chronology. 



Squares. 



Bolls. 





Fallen. 



Hanging. 



Fallen. 



Hanging. 





Weevil arrived in the August disper- 

 sion of 190G. First generation in 

 green squares collected. 



do 





.5 



0.0 

 0.0 







Fort Towson, Intl. T. 









...do... 









Lula, Tex 



Weevil arrived in 1900. probably 



0.0 

 2.4 



14.4 

 8.2 

 0.0 



10.5 

 0.0 



2.0 

 0.0 

 0.0 



.6 

 0.0 

 1.0 



.4 

 0.0 

 8.4 

 1.2 

 1.2 

 1.4 



.6 



.4 

 0.0 



1.0 



3.0 

 8.5 

 9.0 

 1.3 

 6.5 













Roosevelt, Tex. 



Wpevil arrived in 1905 







0.0 

 5.8 





Junction, Tex 1 do 















Weevil arrived in 1904 or 1905 





2.3 

 0.0 



1.8 

 0.0 





Dallas, Tex 



Weevil arrived in 1904; set back Feb- 

 ruary, 1905; rearrived 1905. 



do 



.do... 



4.6 



5.9 







Terrell. Tex.. 







Johnsons Bayou, La 



MansfieM. La 



Weevil arrived in the August disper- 

 sion of 1904. 

 do . 







2.9 



16.6 



2.2 



10.4 



11.7 



27.3 



12.4 



11.5 



9.8 



5.0 



9.2 



0.0 

 0.0 

 0.0 

 1.5 

 5.9 

 1.7 

 .4 

 .4 

 0.0 

 1.5 

 1.0 



5.9 



Marshall. Tex 



....do 



13.5 





.do 



4.5 



Many. La 



Corsicana, Tex 



Waco, Tex 



Trinitv, Tex 



Weevil arrived in the fall of 1903 



Weevil present in 1903 



5.9 

 3.4 

 11.1 



Weevil present in 1901 



. ..do 



10.3 



Palestine, Tex 



Calvert, Tex 



3.3 



...do 



6. 6 



Taylor, Tex 



....do 





Ilallettsville, Tex.. 





3.7 





Weevil arrived in 1S94; set hack until 



1897. 

 Weevil arrived in lso.j; set hack until 



189G. 

 ....do 





Cuero, Tex 



19.9 



10.2 

 13.8 



0.0 



0.0 

 2.2 

 0.0 

 0.0 

 3. 3 



1.0 





.5 



Goliad, Tex 



Weevil present in 1894 



4.9 



Corpus Christi. Tex 



Beeville, Tex. 







do 























CONCL1 BIONS. 



A few points of practical importance have been deduced from the 

 foregoing general tables. 



