THE CONCHUELA. 



61 



Regardless of the amount of cotton ginned, in computing the actual 

 destruction we should include the badly-stained bolls with the 

 destroyed bolls. A considerable part of the badly-stained cotton 

 is regularly left by pickers on account of its being imperfectly opened 

 out and not easy to handle. Furthermore, as wnll be shown in dis- 

 cussing the effect of plant-bug injury on the quality of the lint, the 

 picking of such lint is a distinct disadvantage, probably more than 

 offsetting the increased weight attained. In Ceceda A, No. 14, 

 therefore, the actual loss in 1905 may be considered to be equivalent 

 to about 24.38 bales, or 0.2 bale per acre. 



Damage to cotton in Zaragoza. — Three examinations were made in 

 Zaragoza, one in each of the first 3 blocks, following the plan here- 

 tofore outlined of examining 25 plants per row. The data obtained 

 represent local conditions only and do not necessarily indicate either 

 the damage or the yield throughout each block. It should be noted, 

 however, that the final yield of the 360 acres comprising the 3 blocks 

 was 187 bales, whereas the examinations from which the data in the 

 following table were obtained would indicate a yield of 193 bales. 



Table XXIX. — Local examinations in Zaragoza with reference to cotton damaged hy 



plant-hugs. 



Block. 



Zaragoza B 1 (east 

 end) 



Zaragoza B 2 (east 

 end) 



Zaragoza B 3 (west 

 end) 



Bolls not ruined. 



Lint 

 picked 

 and 

 fallen 

 from 

 burrs.o 



Per ct. 

 39.56 



24.98 

 63.5 



Per- 

 fect. 



Slightly 

 stained. 



Per ct. 

 16 



15.4 

 10 



Per ct. 

 6.7 



11.3 

 5 



Total. 



Per ct. 

 62.26 



51.68 



78.5 



Equiv- 

 alent 

 bales 

 per 

 acre. 



0.49 

 .521 

 .61 



Bolls ruined. 



Badly 

 stained.* 



Per ct. 

 9 



13.2 



3.7 



De- 

 stroyed, 



Per ct. 

 17.14 



19.92 

 11 



Total. 



Per ct. 

 26 



33 

 14.7 



Equiv- 

 alent 

 bales 

 per 

 acre. 



0.174 

 .255 

 .11 



Unopen 

 bolls. 



Per ct. 



11.7 



15.4 

 6.3 



a Deducting 2.44 per cent, representing approximately the number of ruined locks present in empty 

 burrs. 

 b Adding 2.44 per cent of ruined locks present in empty burrs. 



EFFECT OF PLANT-BUG ATTACK ON QUALITY AND MARKET VALUE OF LINT. 



The market value of each bale of cotton is determined by examina- 

 tion of samples of the lint by experts who judge^of its relative quality. 

 This grading of the staple limits the use to which each bale may be 

 put. Stained cotton is the least desirable of all grades and generally 

 brings a selling price of about 50 per cent of the average unstained 

 grades. Tables XXVII and XXIX are illustrations of instances 

 wherein the percentage of slightly-stained cotton has been deter- 

 mined in. the field. This class may include as many of the entire 

 number of bolls as 11 per cent, or 17 per cent of the lint picked, omit- 

 ting bolls completely ruined. It is obvious that such inferior material 

 reduces the value of the better grades with which it may be mixed. 



