27 



application between August 17 and 20, the first having been made 

 between August 1 and 5. 



On August 24 counts were made to determine the percentage of 

 injury to cotton on the poisoned and unpoisoned areas on the farms 

 of Messrs. W. A. Walhice and W. Higden. Ten typical plants were 

 chosen in each of the poisoned and unpoisoned areas, and all fruit 

 upon the plants*and ground beneath them carefully examined. On 

 Mr. Wallace's farm the plants on the unpoisoned plat showed that 

 over 16 per cent of the entire fruit was injured, while only 10 per cent 

 of fruit on plants on the poisoned plat showed injury. On Mr. 

 Higden's farm 15 per cent of the fruit of the plants on the unpoi- 

 soned plat was found to be injured, while but 9 per cent was injured 

 on the poisoned plat. 



TRAP CROP EXPERIMENTS. 



In view of the fact that the greatest benefit from the use of June 

 corn as a trap crop will come from its general planting throughout 

 a neighborhood, an endeavor was made during the spring of 1905 to 

 arouse general interest in the trap-crop system among the farmers 

 in the vicinity of Clarksville, Tex. Nearly every season bollworms 

 are more or less destructive in this locality, hence it was deemed a 

 desirable place for a test of this kind. 



Arrangements were made with each of several planters just north 

 of Clarksville to plant from 3 to 6 acres of June corn and cowpeas. 

 The total area thus arranged for in the experiment was about 50 acres. 



Unfortunately the abnormally heavy rains during June and early 

 July rendered cultivation of the corn impossible. In several in- 

 stances the crop was entirely killed out by the excessive rains and 

 weed growth. 



There is no way of measuring the value of a trap crop in pounds 

 of seed cotton, as it is impossible to arrange a check plat of cotton 

 where conditions are identical without having the plats adjacent, and 

 in this case equal protection is afforded both of the cotton areas. 

 Although the experiment was greatly handicapped by the above-men- 

 tioned weather conditions, numerous observations during August 

 and September showed that the adjacent cotton was being protected 

 to a considerable extent by the deposition of a large number of boll- 

 worm eggs on the trap corn. 



At Quinlan, Tex., about 30 acres were utilized in a similar experi- 

 ment, with apparently good results. In some instances, in addition 

 to the protection afforded the adjacent cotton, a large yield of corn 

 was obtained from the trap areas. 



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