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extent to clear the land of the plants and plow in the fall, which, aside 

 from being good farm practice, will exert a very beneficial influence in 

 controlling the bollworm by breaking open their hibernation cells and 

 exposing the pup« to the influences of cold and rain during the winter. 

 The above recommendations involve no outlay of labor and capital 

 not requisite to successful cotton culture, and, furthermore, agree 

 entirely with the best known methods of circumventing the ravages 

 of the Mexican cotton boll weevil. It thus becomes possible to secure 

 the maximum amount of freedom from the depredations of the boll 

 weevil and the bollworm b}^ one and the same course of farm practice. 



II. The use of corn as a trap crop ma}^ be advantageously combined 

 with the cultural methods indicated above, especially so if it is not 

 found possible to plant early on account of climatic conditions or foi 

 other reasons. In planting cotton leave vacant strips across the field 

 every 200 or 300 feet, sufficiently wide for planting 10 or 12 rows of 

 corn. These strips should be planted with corn so that it will be in 

 prime silking condition not later than August 1. Under favorable 

 conditions of rainfall and with good cultivation, Mexican June corn 

 planted by June 1 will be tasseling and silking freely by August 1. Plant 

 cowpeas in the corn belts, so that the plants will be flowering along 

 with the appearance of the tassels and silks on the corn. The cowpeas 

 are to furnish food for the moths and will largely prevent their going 

 to the cotton for food and depositing thereon a certain proportion of 

 their eggs. The corn may be allowed to mature and may be harvested 

 in the usual wa3\ Sufficient corn ma}^ be grown in these belts to meet 

 a portion of the needs of the plantation and at the sa,me time afford 

 material protection to the cotton crop from boll worms. As will at 

 once appear, the 'planting of corn through the cotton field at the usual 

 time in the spring is had practice from a holVworm point of view. With 

 the hardening of the corn during July the insects turn their attention 

 to cotton. The trap rows of corn should not be tasseling and silking 

 before about August 1. 



III. Experiments with poisons the past year indicate that these 

 may be profitablj^ used in lessening bollworm injury to cotton. The 

 poisons should be applied to the plants in time to insure the destruc- 

 tion of the maximum number of young larvse of the August genera- 

 tion. In general, this will be about August 1. When it is noticed 

 that the moths are becoming abundant in the cotton fields the first 

 application should be made, and a second application should follow a 

 week or ten days later. The occurrence of even a moderate rain 

 shortly after the poison has been applied will necessitate another 

 application if best results are to be secured. If conditions are favor- 

 able for bollworm injury poison should be used again about September 

 1 in time to check injury from the September generation of larvse. In 

 the work of poisoning special pains should be taken to cover all parts 



