Dipping Your Seed Potatoes in 
/VewImproved Semesan Bel Pays 
By Controlling Seed-Borne Diseases 
Khizoclonia reduces potato 
quality and yield. 
Scab pits potatoes and makes 
them unsalable. 
Disease steals your potato profits by decreasing the yield 
and lowering the market value. A loss in yield of only 10% 
frequently may represent the profit on your entire planting. 
Rhizoctonia and seed rotting are responsible for a large 
portion of yield losses, while Rhizoctonia and scab account 
for lowering of market value. These needless losses can be 
Semesan Bel controls Rhizoctonia stem lesions. Untreated— 
27% Rhizoctonia infected—73% healthy. Semesan Bel 
treated—3% Rhizoctonia infected—97% healthy. 
largely prevented by treating the seed, before planting, 
with Improved Semesan Rel potato dip. Practical field tests 
in nineteen states have proved the quick one-minute dip in 
Improved. Semesan Bel solution is equally as effective in the 
control of seed-borne Rhizoctonia and scab, and in reducing 
Rhizoctonia stem lesions as the IJ 2 to 2-hour soak in cor¬ 
rosive sublimate; or the hot formaldehyde treatment— 
except under unusual soil contamination. 
including “certified” or apparently “disease-free” seed, 
should be treated. Even certified seed may carry as much 
as 10% Rhizoctonia and it will rot just as quickly in cold, 
wet soils as any other seed—therefore treating it is a paying 
operation. 
By Improving Quality 
UNTREATED SEMESAN BEL 
CHECK TREATED 
The improvement in quality due to treatment is shown by 
comparison of potatoes grown from untreated seed with 
those from Semesan Bel treated seed. 
The larger per cent of prime potatoes—free from scab, 
which makes them unsalable—free from Rhizoctonia, that 
dulls their skin and makes them misshapen — usually pays 
the small cost of treating with Improved Semesan Bel. 
The cost of treating is only 1 % to 3 cents a bushel, de¬ 
pending upon the quantity of Improved Semesan Bel pur¬ 
chased. One pound of Improved Semesan Bel treats from 
GO to SO bushels of seed. Considering the cost of disin¬ 
fectant, time, labor, and equipment required. Improved 
Semesan Bel is less expensive than any other method com¬ 
monly used. 
By Increasing Yields 
In six farm tests Semesan Bel gave an average yield increase 
of 35.4 bushels. The untreated averaged 259.9 bushels, 
the treated 295.3 bushels. Photo of 1 jo acre yield. 
By Reducing Seed-Piece Decay 
An illustration of Semesan Bel’s effectiveness in seed-piece 
preservation. 
Untreated—38% rotted and 62% sound seed pieces. 
Semesan Bel treated—7% rotted and 93% sound seed pieces. 
In addition to killing seed-borne diseases Improved Semesan 
Bel protects the seed pieces from rotting under cold, wet 
soil conditions, assuring better stands and larger yields. 
The U. S. Dept, of Agriculture in Miscellaneous Publication 
No. 53 says—“In parts of the country where the rotting of 
sets is a serious problem, seed treatment of apparently clean 
seed is likely to pay.” 
By Producing Better Stands 
The stand of potatoes on the left grown from untreated seed 
will not produce as large a yield as the line stand on the 
right from Semesan Bel treated seed. 
Improved Semesan Bel by protecting seed pieces against 
seed-borne diseases and early decay aids in producing better 
stands of more vigorous plants and greater yields. All seed, 
Thirty-five and four-tenths bushels of potatoes an acre 
is the average increase in yield secured in demonstrations 
with Improved Semesan Bel on six practical farms in Maine, 
Minnesota, Ohio, Pennsylvania, and New York. Semesan 
Bel, by destroying disease organisms on the seed and pre¬ 
venting seed rotting, helps growers to obtain maximum 
yields of prime potatoes so essential to greatest crop profits. 
According to U. S. Dept, of Agriculture Miscellaneous 
Publication No. 53, “Gains in yield as a result of seed dis¬ 
infection frequently reach 20 to 30%, and the gain in yield 
and quality of prime stock is often even greater.” The 
Federal and many State Experiment Stations are urging 
seed treatment as a step toward more profitable production. 
By Returning Many Times Its Cost 
Only 0.4 of a bushel of the average yield increase of 35.4 bushels 
reported above was required to pay for the Improved 
Semesan Bel, leaving a return on money invested 
of 9330 %. 
Increases in yields ranging up to 25% have been obtained 
with Improved Semesan Bel; but let us figure the profit on 
the average increase of 13.6%, or 35.4 bushels mentioned 
above. The 35.4 bushels priced at $1.01 each—the ten- 
year average farm price for potatoes—are worth $35.75; 
deduct the cost of treating—20 bushels of seed per acre 
with Semesan Bel bought at the 25-pound rate, or 36 cents 
—and the profit is $35.39 per acre, or 9830% return on the 
money you spent for disinfectant. A handsome profit! 
Practical tests indicate that over a period of years you 
may expect an average increase in yield of about 10% 
from Improved Semesan Bel. Get this profit every year by 
using this quick, easy, effective, and inexpensive potato dip. 
• TREATMENT COST ONLY V/2. TO 3 CENTS A BUSHEL • 
