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ON THE CONTROL OF POTATO‐ROOT EELWORM ( HETERODERA ROSTOCHIENSIS WOLLENW.) BY CHLORINATED PHENOL AND p‐m‐ CRESOL IN SOLUBILIZED FORM *
Author(s) -
STONE L. E. W.
Publication year - 1956
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.1744-7348.1956.tb02124.x
Subject(s) - loam , heterodera , biology , population , phenol , agronomy , solubilization , horticulture , taproot , soil water , chemistry , nematode , biochemistry , ecology , demography , organic chemistry , sociology
Solubilized phenols and cresols, applied at the rate of 1s gal./sq.yd. at 5% strength on light sandy loam, have killed up to approximately half the population of potato‐root eelworm in the top 8 in of soil. When nematicide distribution was aided by rotavation on the same site, yields were approximately doubled compared with untreated areas. The eelworm population in the soil also increased, but not so much as that where no treatment had been applied. Under cold glasshouse conditions on light loam, high‐volume methods have greatly increased the yield of tomatoes compared with untreated plots, but the soil population of potato eelworm has also risen. 20 gal. to the square yard of 0·5% p‐m‐ cresol is better than 10 gal. of 1% by both criteria. There is evidence of a slow kill of cyst contents in soil samples stored in the laboratory. The high‐volume type of soil drench is shown to be highly effective under laboratory conditions. The importance of the initial water content of the soil is demonstrated. The superiority of the 20 gal. treatment over the 10 gal. one is confirmed. Investigations on kill in depth by very large applications of dilute nematicide in the same cold glasshouse have demonstrated the part played by the rate at which the material is applied. The degree of kill in the 6–12 in. soil layer is still inadequate. The practical applications of this type of nematicide are briefly discussed.