Published in Scientific Papers. Series A. Agronomy, Vol. LXII, Issue 1
Written by Florina ȘERBAN (COJOCARU), Cristian Andrei GEORGESCU, Ciprian BOLOHAN, Costică CIONTU
The herbicides with ALS (inhibiting the enzyme acetolactate synthase) are rather nique in their ability to control weeds through both foliar uptake and through root uptake as they are also iologically active in soil. This provides control of both emerged weeds and those that emerge after time of application. ther benefits include low application rates and low mammalian toxicity. Carryover of a herbicide beyond the year of pplication can be of benefit in controlling weed growth in subsequent years, but can also be of concern in ausing injury to sensitive crop species that may be grown in the years following application. The paper present the results oncerning the study on the residual effect of some herbicides (inhibiting the enzyme acetolactate synthase - ALS) pplied for weed control in sunflower crops in relationship with the climatic conditions. The phytotoxicity and ersistence of the herbicides in soil was assessed using the mustard root inhibition bioassay. In earlier stage of mustard egetation the treatments withimazamox herbicide had a residual effect, but over time this effect was ignificantly reduced. The chemical composition of the soil was not affected by the applied herbicides. The results ndicate that for wheat was not residual effect for any of treatments used.
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