12 PKOMFKRATION IN CONTROL OF BOLL WEP^VIL. 



field. While practically one-half of the scjuares attacked showed 

 proliferation, a far greater proportion of the locks attacked by the 

 weevil showed a similar formation. 



From these records it appears that 55 per cent of the nearly 9,000 

 locks examined received feeding punctures only. Among the locks 

 thus injured, an aA^erage of slightly over 81 per cent showed distinct 

 evidence of proliferation. A comparison with Tabic I indicates that 

 in bolls proliferation occurs from feeding punctures in a higher per- 

 centage of cases than it does in squares. The records upon Pachon 

 and Korean cottons were included in the table because of the special 

 interest attached to these varieties, but the data regarding them 

 are too meager to be reliable in drawing defmite conclusions regarding 

 proliferation in them, and they siiould be excepted in making a com- 

 parison of varieties. It is to be regretted that the two varieties 

 mentioned produced so little fruit at Dallas, Tex., that more extensive 

 data regarding them could not be obtained, and the fruiting occurred 

 so late in the season that no bolls coidd mature. The range in the 

 percentage of cases in which ])roliferation residts from feeding punc- 

 tures in bolls is not so great as it ap])ears to have l)een in s(|uares. 

 This fact may possibly be due to more uniform climatic and cidtural 

 conditions, as nearly all the records for l)olls were made from mate- 

 rial collected in one locality at the same time. 



These records appear to the writer to show a remarkable uniformity, 

 and to indicate that among the 15 varieties mentioned in the table 

 which are most clearly comparal^le there is little diiTerence in the 

 natural tendency to proliferate in resj)onse to feeding injuries made 

 by the weevil in bolls. 



INFLUENCE OF DIFFERENT LOCALITIES AND SEASONS. 

 OBSERVATIONS ON SQUARES. 



This series of observations was made to determine, if jwssible, what 

 influence different localities and seasons might have u})on ])rolifera- 

 tion in the same variety of cotton. Whde similar data have been 

 secured for a number of varieties, the exhibit following is restricted 

 to the two varieties on which the largest number of observations 

 was made, as the conclusions which may be drawn therefTom are 

 consecpiently most reliable. In the case of King cotton, different 

 seasons as well as localities are represented, while with Shine, different 

 localities are represented at approximately the same time. In com- 

 piling this table, both feeding and egg punctures have been included. 

 It has seemed desirable also to present the figures showing the effect 

 which the proliferation has had upon the weevil stages found. 



