BREEDING RECORDS OF L906 



17 



The only one of these tables in which there appears any definite 

 progression is the Victoria table, in which there is a regular increase 

 of percentage throughout the last half of June. 



In order to arrive at an explanation for the obviously irregular 

 conditions of parasitism, the figures have also been rearranged 

 according to field conditions. It was found that, generally hanging 

 forms in wooded or cleared country were more highly parasitized 

 than those on prairie land. The only definite comparisons which 

 could be found were as follows: 



Table X. Percenter of parasitism of tfa boll weevil in forms in woodland and on 



jiniirii . 





Locality. 



Date. 



Woodland. 



Prairie. 





Hanging 

 Eonns. 



Fallen 



l"<i mis. 



Banging 



forms. 



Fallen 

 forms. 



Goliad 





190(i. 

 September 3 



11.2 



14.9 



s. 2 



6. 

 14.6 



ti 4 





Spntrmbor l't 











Stages in fallen forms on prairie land were found to have a higher 

 genera] percentage of parasitism than those in woodland, although 



the definite case of Goliad gives a different condition. It is only nec- 

 essary to quote the highest percentages reached in each condition to 

 give support to these statements. 



The highest percentage in hanging forms on woodland was 42.6. 



The highest percentage in fallen forms on woodland w T as 8.3. 



The highest percentage in hanging forms on prairie was 14.6. 



The highest percentage in fallen forms on prairie was 10.1. 



Considerable contradictory matter was brought out in comparing 

 the parasitism in fallen forms in shade and in those exposed to the 

 sun. The weight of evidence supports the statement that those fallen 

 and exposed to sunlight are more highly parasitized than those which 

 fall on moist shaded soil. Only five definite comparisons can be 

 presented to show the irregularities which exist. 



Table XL- Parasitism ofth boll until in fallen forms in sun and shade. 



Localii;. . 



Date. 



w oodland. 



Prairie. 



Shade. 



Sun. 



Shade. Sun. 





i i 



0.54 



1.09 





Taylor, Tes 





6.69 1.3 



Trinitv. Tex 





2. 3 



""lot" 





Victoria, Tea 



July 'ii 



6 



Victoria, Tex . . . 



July 22 







It 



Waco, Tea 



Vllglisl _"' 



B 7 



ii. 8 











10292— Bui. 7:;— 08- 



