At rates of application ranging from 1.5 to 3.0 kg of ai / ha, PH 40-51 proved to be an effective and safe black grass herbicide in autumn-sown wheat. At these dosages, a number of important broad-leaved weeds are also satisfactorily controlled. The apparent effectiveness against wild oats in cereals merits further evaluation. Studies on the synthesis of PH 40-51 have so far not resulted in a process which is economically acceptable.
LITERATURE CITED
Avena coleoptile segments were grown in the presence of a series of homeosterically related compounds, RCekUNHCOfXICLLCOOH, where (X) = -OCH2(D, -NHCH2GI), -CH2CH2(III), or -S(IV), and their effects on elongation, as well as
Durch Umsetzung der Isocyanate (I) mit 3‐Hydroxypropionitril (II) werden die Urethane (III) erhalten, deren Hydrolyse mit konz. Salzsäure zu den Carbonsäuren (IV) führt (8‐63% Ausbeute).
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