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INVESTIGATION ON HETERODERA SCHACHTII IN LANCASHIRE AND CHESHIRE PART I. THE INFESTATION IN CERTAIN AREAS AS REVEALED BY CYST COUNTS; AN ESTIMATION OF THE ERRORS INVOLVED IN THE TECHNIQUE AND A CORRELATION WITH INTENSITY OF DISEASE
Author(s) -
SMITH A. M.,
PRENTICE E. G.
Publication year - 1929
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.1744-7348.1929.tb07139.x
Subject(s) - infestation , heterodera schachtii , biology , crop , cyst , heterodera , agronomy , veterinary medicine , nematode , surgery , medicine , ecology , sugar beet
SUMMARY.1 Heterodera schacJitii has been identified in many parts of Lancashire and Cheshíre where severe losses have resulted from failure of the potato crop. 2 A detailed study of the errors involved in the technique of a method for estimating the infestation has been made. 3 The degree of infestation, as determined by cyst counts, has been compared with records of crop failure. 4 The conclusions that have been drawn are to the effect that: (a) where “eelworm disease” has been noted recently there is a positive association of intensity of disease and cyst content of the soil; b ) where the disease was observed three or four years ago, disease and crop failure are always associated with a high cyst content of the soil, but there may be a moderately high infestation without apparent diminution of crop yield.