106 THE AMERICAN ROSE ANNUAL 
untreated plants and the complete immunity and perfect 
condition of the rest of the garden, which had been sprayed 
with Fungtrogen, Insectrogen, and Aphistrogen modified to be 
mixed together (Tri-ogen), as described in the article of last year. 
On July 21, Dr. Massey visited the garden and said that he 
was satisfied that our claims were true. He remarked that the 
unsprayed plot was afflicted with every disease and insect that 
the rose is heir to, and he saw that the sprayed plants were free 
from any disease or insect pest, carrying luxuriant bloom and 
fine foliage down to the soil. The two photographs in Plate XVI 
facing page 104 tell the story better than words. 
Dr. Massey was amazed at the fine condition of our treated 
plants and congratulated us. He also requested that we try 
to bring the diseased plot back to health. Since it is notorious 
that black-spot is difficult or impossible to control after it is 
once established, he seemed to be asking the impossible. 
On July 22, we cut back the diseased plants and disinfected 
the soil with Terogen. Beginning on that date, the plot was 
sprayed every ten days with the combined sprays, following the 
schedule outlined last year, making certain that the spray was 
thoroughly applied to the vital undersurface of the foliage. 
Immediately, improvement was noticed. The plants took on 
new foliage and renewed vigor, although the test occurred 
during the driest and hottest period of the summer. In about 
six weeks they were blooming and carrying abundant foliage 
absolutely free from disease or insect trouble. 
I believe that this experiment conclusively proves that 
black-spot can be controlled and even cured. The two pictures 
in Plate XVII facing page 105 are the evidence of this proof. 
Breeze Hill Gardens, Harrisburg, ra. 
At Breeze Hill we have, for many years, made an earnest attempt to find 
how we may keep our roses (including a very large collection) free from black- 
spot and mildew, as well as from insects. I have had to come to the con¬ 
clusion that it is not only the primary fungicidal and insecticidal qualities one 
wants, but the persistence and thoroughness of application insisted on by 
the projectors of Tri-ogen which has undoubtedly been the most satisfactory 
of all the prescriptions. I have little fear that anyone who will honestly and 
religiously use Tri-ogen will be annoyed with conventional bugs and bothers. 
J. Horace McFarland. 
