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EPTC persistence and phytotoxicity influenced by pH and manure
Author(s) -
LODE O.,
SKUTERUD R.
Publication year - 1983
Publication title -
weed research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 74
eISSN - 1365-3180
pISSN - 0043-1737
DOI - 10.1111/j.1365-3180.1983.tb00516.x
Subject(s) - phytotoxicity , lolium perenne , agronomy , chemistry , persistence (discontinuity) , manure , soil water , horticulture , poaceae , biology , ecology , geotechnical engineering , engineering
Summary The degradation of EPTC and consequently its phytotoxicity to ryegrass ( Lolium perenne L.) was greatly influenced by the pH in the three sail types tested. On raising the pH from approximately 5 to 7 the microflora and the degradation in the soil increased and the phytotoxic period was shortened by 2–3 weeks in glasshouse experiments. A similar increase in degradation of EPTC was also found on adding manure. The results indicated that EPTC could be ineffective in soils with high microbiological activity. On the other hand, a delayed breakdown of EPTC on acid soils could result in damage to the crops. In the period 2–4 weeks alter the disappearance of phytotoxicity there was an increase in the yield of ryegrass. This corresponded to a concentration of 0.1 g/g or less of EPTC in the soil.