Small Seeded Legume and Grass Seed Treatments 
Tests Conducted at Du Pont Semesan Laboratory 
1948 - 1949 
Seed % Inc. Over Check Seed % Inc. Over Check 
Korean Lespedeza —___-__- 21 White Dutch Clover. 46.9 
American Red Clover________ 1K. RU eway Caaeisi) Le 87 
POW G NS 2 oo0 ee en ee Se sys «= IDENDIE) (eS, 2 21 
PEST TYXO ty eee Tope BUls CLOVG Ty se eee eee 141.6 
Meadow Fescue _......... LOE bILdstooubretoll =. 38 
SWwecueClov crease eet ee 10 (Broadleaf) 
MaidinogClovie rea ese aes OP Dente Grass pee eee Penmaes 1% 
Alsikel Clover? 2ee ee PRY MehaNm eles Teikiey i 10 
In series of tests which were made in Oklahoma, Untreated Al- 
falfa seed produced 27% of a stand - Treated seed 51% - almost 
double. Vetch jumped from 50% to 98% - again almost double. Bear 
in mind this was all high germinating seed. 
110 to 160% Increase on Grasses 
In another series of official tests not yet fully completed, Ken- 
tucky Blue Grass showed an increase of over 160% and Brome Grass 
over 110%. That means over 2 to 2% times as many plants from a 
certain amount of treated seed as from the same seed not treated. 
Gro-Coated Seed Grows More Vigorously 
In one test an equal amount of treated and untreated seed were 
planted. After forty days the plants were counted and weighed. In the 
treated plot there were 325 plants. In the untreated, only 136. The 
treated plants weighed .285 grams each, untreated .273. The total 
green weight of the treated plot was 92.7 compared with 37.2. That’s 
246% more growth. 
Iowa State College Recommends Treatment 
At a field day at Atlantic in the summer of 1950, the Iowa State 
Extension Department had a number of flats of seed on display show- 
ing treated and non-treated legume plants growing side by side. There 
was a marked difference in favor of the chemical treatment of le- 
gume seed. They had a sign stating it pays to treat legume seed. 
It is, of course, necessary to use the proper chemicals. They must kill 
the disease without injuring the seed. 
