PENNSYLVANIA STATE TOMATO 
SEED CERTIFICATION REQUIREMENTS 
TOMATO STOCK SEED 
Before any variety can even be entered for certification in Pennsylvania, 
stock seed from carefully selected and staked plants must be saved the year previous 
to certification. D. Landreth Seed Co. goes further than that as shown by the 
previous pages, as our stock seed is saved from carefully staked plants at least 
two years previous to certification, and seed from those staked plants proved by test 
a year in advance of certification. Only the very best tested strains are used for 
growing our fields for certification. 
FIELD INSPECTIONS 
Advanced Plant Pathologist Iv. W. Lauer, of the Bureau of Plant Industry, 
Department of Agriculture, Harrisburg, Pa., accompanied by Dr. Warren Mack, 
of Penn State College, and Hal Mills, Plant Breeder for D. Landreth Seed Co., 
inspect all our tomato fields before the first pickings are made. At least one more 
field inspection is necessary and sometimes one or two after that before these 
two inspectors are satisfied that the fields are up to the high standards required. 
During these inspections the fields are rated for vigor, and the plants and 
fruits are carefully examined for disease and trueness to type, whole fields being 
discarded if they do not meet the very strict requirements. 
INSPECTION OF EQUIPMENT 
The seed saving machines are inspected, and the processes of washing and 
drying of the seed are checked. 
GERMINATION TESTS 
Samples of certified tomato seed are taken by Inspector Lauer direct from the 
bagged stocks. These are tested for germination at Harrisburg and certificates 
issued to our Company. 
Appearing above in the illustration to the left is Hal Mills, Vegetable Specialist and Plant 
Breeder of D. Landreth Seed Co., and K. W. Lauer, the State Inspector. To the right is shown 
Mr. Lauer, Jack Tomlinson, our grower who produced over 21 tons per acre on 10 acres (Mr. 
Tomlinson used our special stock of Marglobe), and Dr. Warren Mack of Penn State College. 
