CONTROL OF DAMPING-OFF 3 



figure in most of the tables (e. g., Table 10) represents the average of the results 

 in several experiments. Such a tabulation can hardly bring out all the facts 

 which would be evident if each experiment were reported upon separately; but 

 they were thus brought together to save space, and conclusions are in each case 

 stated in the text. 



TREATMENTS OF SEEDS 



Spergon^ was used only for the treatment of the seeds of Lima bean and gave 

 very good results. The number of plants which lived was increased 76 percent 

 by it, only 21 percent by red cuprous oxide or zinc oxide, and some injury was 

 caused by Semesan. 



Treatments of seeds of vegetables with red cuprous oxide, Semesan, and zinc 

 oxide were, in many experiments, compared with one another and with certain 

 treatments of the soil. The results, averages for each of the treatments investi- 

 gated, are recorded in Table 10. 



'A product of the United States Rubber Company. 



Table 1. — Recommended Seed Treatments for Vegetables 



Beet Semesan or red cuprous oxide 



Broccoli Semesan or zinc oxide 



Brussels sprouts Zinc oxide or Semesan 



Cabbage Semesan or zinc oxide 



Carrot Red cuprous oxide or zinc oxide 



Cauliflower Semesan or zinc oxide 



Celery and celeriac Zinc oxide 



Chicory Semesan or zinc oxide 



Collards Semesan oi zinc oxide 



Corn Semesan 



Cress, water Red cuprous oxide 



Cucumber Semesan or red cuprous oxide 



Dandelion Red cuprous oxide or Semesan 



Eggplant Semesan or zinc oxide 



Endive Semesan or zinc oxide 



Kale Semesan or zinc oxide 



Kohlrabi Semesan or zinc oxide 



Lettuce Red cuprous oxide or Semesan 



Muskmelon Red cuprous oxide or Semesan 



Onion Semesan 



Parsnip Zinc oxide 



Pea Semesan 



Pepper Semesan or red cuprous oxide 



Radish Semesan or zinc oxide 



Spinach Red cuprous oxide or Semesan 



Squash, summer Semesan or red cuprous oxide 



Swiss chard Semesan or red cuprous oxide 



Tomato Zinc oxide or red cuprous oxide 



Turnip Semesan or zinc oxide 



