115 



II were taken in their order at vaxyktg distances from the road. 

 Block 111 was some distance from the others. In this case lot 1 was 

 taken along the edge on the side toward the other blocks, while lot 2 

 was taken in the middle of the block. 



Table XXX. — Progress of infestation, field 2, Victoria, Tex. 



Block. 



Lot. 



Date. 



Number 

 of 



squares 

 exam- 

 ined. 



Number 



of 

 squares 

 infested. 



Percent- 

 age of 

 infesta- 

 tion. 



Remarks. 





li 



1 



1 2 

 3 



w 



1903. 



225 

 414 

 210 

 200 

 362 

 185 

 180 

 202 

 136 

 150 

 200 

 218 



166 



330 



45 

 351 



12 







241 



62 

 156 



31 



105 



9 



130 



91 

 228 



38 

 290 



20.0 

 84.8 

 5.7 

 0.0 

 66.6 

 33.5 

 86.7 

 15.3 

 77.2 

 6.0 

 65.0 

 41.7 

 88.0 

 22.9 

 88.0 



Infestation began in this corner. 



>Lot 2, in middle of Block I. 



/Lot 3, opposite corner of block from 

 j lotl. 



/Lot 1, near public road, passing lot 

 \ 1 of Block I. 







I 







f.....do 





\ August 22 





/August 13 . 





/August 24 





/August 13 





II 



\ August 24 







j August 13 















lEdge of block. 





/August 29 



III 



/August 17 



>Middle of block. 













From a study of Block I it is evident that infestation began some 

 time in July, since when first found it was entirely restricted to a 

 small area. A study of each block chronologically shows the steady 

 but rapid progress of the weevil, as does also a comparison of the 

 three blocks at the nearest possible dates. The tremendous activity 

 of weevils in midsummer and the possible rapidity of their spread is 

 clearly shown in this field. 



A study of two other fields yielded practically similar results. The 

 dates of examinations, with the percentages found in each case, will 

 be given. In field 3 there was found, upon June 2, 3 per cent of infes- 

 tation; on July 16, 25.9 per cent; on August 15, 65.9 per cent. This 

 field was from native seed and was planted about three weeks earlier 

 than field 4, which was of King seed, and just across a turn row from 

 field 3. In field. 4 infestation began very late, as on August 8 there 

 appeared to be only 2 per cent and on August 15, 23.6 per cent, while 

 on August 26 it had increased to 91.5 per cent, which is about the 

 usual percentage of maximum infestation. 



