CONTROL OF BOLL WEEVIL IN MISSISSIPPI DELTA. 



17 



Table 15. — Seed-cotton -production by rows and plats, Eureka plantation, Tallulah, La., 



1916. 



Plat No. 



Row No. 



Seed-eotton production. 



First 

 picking, 

 Aug. 17. 



Second 

 picking, 

 Sept. 8. 



Third 

 picking, 

 Nov. 21. 



Total 



by 

 rows. 



Total 



by 



plats. 



Check No. 1. 



Check No. 2. 



Ounces. 

 68 

 55 

 33 

 33 

 20 

 15 

 25 

 36 

 71 

 104 

 23 

 87 

 16 

 37 

 29 

 44 

 42 

 42 

 44 

 38 

 32 

 28 

 34 

 38 

 130 

 106 

 129 

 122 

 20 

 18 

 19 

 17 



Ounces. 



78 



75 



s 36 



' 58 



112 



111 



99 



117 



160 



144 



188 



158 



195 



158 



77 

 115 

 179 

 215 

 222 

 182 

 204 

 226 



94 

 133 

 101 

 109 

 206 

 161 

 164 

 176 



Ounces. 

 13 

 13 

 16 

 12 

 30 

 36 

 44 

 35 

 50 

 50 

 56 

 38 

 33 

 26 

 13 

 36 

 28 

 32 

 63 

 93 

 67 

 51 

 49 

 50 



7 

 14 



7 



14 

 65 

 95 

 112 

 119 



Ounces. 

 159 

 143 

 85 

 103 

 162 

 162 

 168 

 188 

 281 

 298 

 267 

 283 

 244 

 221 

 110 

 170 

 147 

 189 

 286 

 346 

 321 

 261 

 287 

 314 

 231 

 253 

 237 

 245 

 291 

 264 

 295 

 312 



Ounces. 



490 



600 



1,129 



745 



1,183 



1,162 



A number of rather interesting points are brought out by these 

 figures. It is seen that the picked plats generally increased in pro- 

 duction from west to east — that is, with the decrease in pickings. 

 Of course the increase in soil fertility is in the same direction, but it 

 is far from sufficient to account for the differences between the plats. 

 One break in this gradation is the comparatively low records of 

 plats 4 and 5. This was due to the poor cotton in rows 15, 16, 17, 

 and 18, which has already been mentioned. From Table 15 it is 

 seen that these four rows yielded about the same as the other four 

 rows of these two plats at the first picking, but at the second and 

 third pickings there was a great loss in these four rows of poor cotton. 



Another interesting feature of the production records is the late 

 maturity of check 2. In this plat the vegetative growth was not 

 restrained as in the shaken plats, and as a result the exceedingly wet 

 weather of July produced a very rank plant which shaded the bolls 

 so completely that they did not open. From Table 14 it is seen that 

 this plat yielded, far the lowest of all at the first picking, and it was 

 not until the leaves were killed by the frost that a good portion of the 

 crop in this plat finally opened. In fact, a considerable proportion 

 96828°— Bull. 564—17 3 



