On this date an average of 11.33% of the squares and 4.33% of the bolls were 

 infested on the plants. Of the varieties compared, Keno led with 743 lbs. of seed 

 cotton per acre at first picking, August 19 to 29, followed by Hawkins Early- 

 Prolific with 702 lbs. These varieties gave a total yield of 1,031 and 911 lbs., 

 respectively. 



At Mansura, 2 adult boll weevils were found while planting April 1. On 

 April 23, 23 weevils were found per acre, 109 were found on May 25, and 283 

 were found on June 2. By June 2, 6% of the squares were infested. On July 18 

 the bolls per plant were as follows: 



Toole Early Prolific 11.6 

 Hawkins Early Prolific 10.8 



Rowden 8.2 



King 8.1 



Simpkins 8.1 



Triumph 6.5 



"Native" 6.5 



On this date 54% of the squares and 2% of the bolls were infested. The first 

 open boll was found in Toole Early Prolific In total yield, as well as in yield at 

 the first picking, Hawkins Early Prolific ranked first with 563 and 212 lbs. of 

 seed cotton per acre, respectively. Toole Early Prolific ranged next in total 

 yield and Mehane Triumph in earliness. The results of other variety tests are 

 briefly reported. 



In the fertilizer test on the rich alluvial soil at Bayou Pierre, the results 

 varied considerably, but nitrate of soda apparently increased the crop wherever 

 used. At Mansura, on dark rather sandy loam, the nitrate was not so effective. 

 The excessive weevil infestation prevented the utilization of the fertilizer 

 applied. 



The obstacles in the way of late planting to avoid the weevil injury are 

 pointed out, and the results obtained in experiments are briefly summarized. 



1911 - Cook, O. F. Relation of drought to weevil resistance in cotton. U. S„ D„ A. Bur. 

 Plant Ind. B. 220, 27 p. 



Weevil resistance characters of cotton are more effective in dry regions or 

 seasons. Under these growing conditions the same factor that restricts the 

 growth of the plant also tends to prevent the propagation of the weevils. In 

 humid regions, wet or cloudy weather may impede plant growth but does not 

 weevil propagation. 



Weevil resistant characteristics, such as earliness, quick fruiting, and 

 determinate habits of growth are likely to diminish or disappear when plants 

 grow under intense conditions of heat or humidity. 



Effects of cultural methods and variety characteristics on weevil 

 propagation under arid and humid conditions are discussed. 



1911 - Hunter, W. D. The boll weevil problem with special reference to means of 



reducing damage, U. S. D„ A. Farmers' B. 344:25-26. Sept. 



The author lists 7 varieties which will produce an early crop and have been 

 of value in weevil infested regions. 



1912 - Anonymous. Mexican boll weevil. Sen. Doc. 305:132-136. 



Cotton plant characteristics, such as proliferation, early bearing, deter- 

 minate growth, hairy stalks and stems, abundance of secretion nectaries, 

 pendent bolls, involucral bracts, thickwalled bolls and tendency to retain 

 infested fruit, and their effect on minimizing weevil populations are discussed. 



1912 - Cook, O. F. Cotton improvement under weevil conditions. U. S. D. A. Farmers' 

 B. 501, 22 p. June 11. 



Explains how profitable yields of cotton can be maintained by better selection 

 of varieties, improved culture, and better markets. 



108 



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