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The effects of D‐D treatments applied during a five‐course rotation on the soil population of Heterodera rostochiensis Woll
Author(s) -
DONCASTER C. C.
Publication year - 1964
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.1744-7348.1964.tb01203.x
Subject(s) - biology , acre , crop , crop rotation , agronomy , population , heterodera , host (biology) , horticulture , nematode , medicine , ecology , environmental health
SUMMARY A field cropped with potatoes in the 1st and 6th years and with non‐host crops in the 2nd to the 5th years was divided into plots for D‐D injection, each at 400 lb./acre. Before the final potato crop, untreated plots showed a 50% mean annual decline of the population of potato‐root eelworm. Single injections in different years left populations not materially different. With repeated injections there was a progressive decrease in the proportion of nematodes killed. However, injections for 4 or 5 consecutive years decreased the populations by spring of the 6th year enough to affect them after the final host crop was grown. Under this crop, all populations increased to about the same extent.