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INVESTIGATIONS UPON THE CONTROL OF OAT SICKNESS BY THE ADDITION OF CERTAIN CHEMICAL SUBSTANCES TO SOIL INFECTED WITH HETERODERA SCHACHTII SCHMIDT
Author(s) -
EDWARDS E. E.
Publication year - 1938
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1938.tb02359.x
Subject(s) - biology , heterodera schachtii , agronomy , calcium , infestation , calcium nitrate , chemistry , organic chemistry , sugar beet
SUMMARY An account is given of pot experiments carried out in triplicate in 1936 and 1937 upon the control of the oat sickness associated with the Root eelworm, H. schachtii . Calcium cyanamide, sodium nitrate, ferrous sulphate, ferric chloride and two forms of ferric oxide were incorporated intimately with infected soil, and quantitative observations were made on the effects of the treatments upon oats grown in the soil in 1936 and 1937 with regard to ( a ) germination, ( b ) vegetative growth, (c) panicle production and yield of grain, and ( a ) degree of infestation of the roots by the nematode. The data obtained show that while all the dressings produced better growth of the plants, at least in the first year after application, calcium cyanamide alone yielded significant results. Further, of the treatments tested, only the use of calcium cyanamide at the rate of as much as 100 cwt. to the acre protected the plants completely from oat sickness in both years and, at the same time, apparently eradicated the parasite from infected soil. Unfortunately, such heavy dressings are not a practicable proposition except, perhaps, under special circumstances.