430 Circular Xo. 2. 



tain clean seed. Loose smut of wheat is controlled with difficulty by seed treat- 

 ment. The selection of seed from fields known to be entirely free from the disease 

 offers the best means of combating this malady. The selection of seed, from cer- 

 tain plants in a crop that are unharmed or at least that suffer but slightly from a 

 given disease is now receiving much attention by plant breeders and pathologists. 

 The strain thus developed is know as a resistant strain or variety. Remarkable 

 success has attended the efforts of a number of investigators along this line. This 

 is a means of combating disease that is within the reach of every grower of crops, 

 for this tendency toward resistance to disease appears to be quite commonly ex- 

 hibited by individual plants in any crop when passing through a disease epidemic. 

 Don't neglect to spray and don't fail to spray thoroughly, but remember at the same 

 time to keep your plants in proper condition to receive ths most benefit from the spraying. 



