Journal of Agricultural Research 16(11): 298 (March 17, 1919)

TABLE II.—Effect of various seed treatment on germination of Irish potatoes

PLANTED MAY 18; COUNTED JUNE 15
Treatment Percentage of Germination Remarks
Nicotine sulphate 75 Dipped. Solution 1I to 8,000. Formula
Bordeau mixture 68 Dipped.  Dusted. Seed
Charcoal 90 remained unusually firm.
Hypochlorous acida 0 Dusted. Seed killed by treatment and rotted by several organisms.
F. oxysporum 35 Sprayed. Strong spore suspension.
Iron sulphate 40 Dusted. Some seed killed.
Lithum carbonate 0 Dusted. Thoroughly and quickly rotted.
Mercuric chlorid 60 Dipped. Solution, 1 to 1,000.
Mustard oil 70 Sprayed.
Controls 85 Dipped in water.
Whole seed 97 Dipped in 3 per cent solution of copper sulphate.
PLANTED JUNE 19; COUNTED JULY 15
Charcoal 82 Dusted.
F. oxysporum 0 Sprayed.
Onion juice 55 Dipped. Expressed juice of onions.
Control, cut 88 Dipped in water. Average field performance.
Whole seed 99 No treatment.
aSims. J.L. et al. ANTISEPTIC ACTION OF HYPOCHLOROUS ACID AND ITS APPLICATION TO WOUND TREATMENT.
In Brit. Med. Jour., 1925. no. 1847. p. 129-136. July 24, 1915.)

In the first planting the charcoal treatment gave better germination than the controls, but fell behind in the second planting. None of the others were worth the trouble of treatment. The whole seed gave much better stands and of more healthy vigorous plants.

Third, in applying the best-known cultural practice to the propagation of the potato. For this no rules can be given. Each farmer should judge the condition of his land, its moisture content, tilth, and apparent needs. Rotation with grain and legumes is advisable, allowing the land to be cropped with alfalfa as many years as possible before potatoes are planted. Methods of irrigating and cultivation during the growing season should be investigated at the time for the field in question. Plate 41, A, shows a field planted with good seed, but owing to the dryness of the soil at planting time infection set in, and the fungus destroyed from 60 to 80 per cent of the seed, with the resulting poor stand.