accordance with the directions of the Bureau of Entomology. The 

 prime object in the location of a farm at any particular point was to 

 obtain tj^pical conditions for an area which possessed characteristics 

 that differentiated it from other cotton-producing areas in Texas. The 

 most sharpl}^ defined of the diiferent weevil regions in Texas is the 

 portion of the State where volunteer or seppa cotton exists normall,y. 

 The green parts of the plant persisting through the winter furnish the 

 weevils an abundance of food in this region, of which they are deprived 

 in other parts of the State. The consequence is that an unusually 

 large number pass the winter successfull3\ Damage consequently 

 begins in the fields earlier the following season here than elsewhere. 

 This area normally extends about as far north as to a line between San 

 Antonio and Houston. Another quite distinct region as regards its 

 effect upon the habits of the boll weevil is found in the valley area of the 

 central portion of the State. Between the latitudes of Navasota and 

 Waco, approximatel}', there is a region in which no volunteer or seppa 

 cotton is normally present. Nevertheless, the long season of growth of 

 the plants furnishes the weevil food and means of reproduction until 

 very late in the season. The cotton fields have generall}^ all been cleared 

 from forest land. There is consequently an abundance of- timber 

 which furnishes ideal cover for the hibernating weevils. In this region 

 it has been the practice to devote exceptionally large areas or indi- 

 vidual plantations to cotton. This is the result of the fact that cotton 

 has been the most certain crop that can be produced, and that there are 

 decided restrictions to diversified farming. There is not the opportu- 

 nit}' which occurs south of this region for the cultivation of sugar 

 cane and rice, and at the same time wheat and some other cereals 

 which grow well north of the region under consideration do not pros- 

 per here. The limits of diversified farming are further restricted by 

 the fact that manj" soils are not suitable for the cultivation of corn. 

 The labor and general economic conditions have become centered in 

 the production of one crop, and this has a ver}' important bearing on 

 the application of the cultural system. There is another distinct region 

 which comprises the river valley area of the northern portion of the 

 State. The hill region of central Texas, the prairie region of west 

 central and northern Texas, the east Texas pine woods region, and the 

 irrigated region of the western portion of the State also furnish pecul- 

 iarities which cause the habits of the weevil to be modified, and con- 

 sequentl}^ change materially the necessary means for controlling it. 

 Of course there are many other regions in Texas where local condi- 

 tions, as of soil, might bring about subdivisions of the regions that 

 have been mentioned. However, these strictly local conditions con- 

 cern themselves more with changes in the simple cultivation of the 

 crop than with changes in the general sj^stem of mitigating damage by 

 the boll weevil. 



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