Permit – A new herbicide for control of Cyperus esculentus in maize

Julius-Kühn-Archiv

Becker, Daniel¹  Günnigmann, Albert¹ 

[1] Cheminova Deutschland GmbH & Co. KG, Stade, Germany;

关键词: application rate;    application timing;    Cyperaceae;    Cyperus esculentus;    halosulfuron;    split application;   

DOI  :  10.5073/jka.2016.452.046

来源: DOAJ

【 摘 要 】

Permit, containing the active ingredient halosulfuron (750 g/kg WG) is a new herbicide in maize. It is listed in Annex I since October 2013. Permit plays a special role when dealing with the hard to control weed yellow nutsedge (Cyperus esculentus). Yellow nutsedge is an invasive plant belonging to the family Cyperaceae (sedges). Specific graminicides used to control Poaceae (sweet grasses) are not effective against Cyperacea. Propagation is rapid and occurs exclusively via tubers formed in the soil. Affected areas in Germany grow rapidly, especially in Lower-Saxony. Application rates from 30-50 g/ha Permit were tested in solo or split application in 7 trials to control Cyperus esculentus in maize. Application timing proved critical for successful control. High levels of control were achieved with 30-50 g/ha Permit with single applications at BBCH 16 (efficacy 94-98%) as well as with split applications at BBCH 14 and 16 of the crop (efficacy 94-99%). Because yellow nutsedge often emerges in multiple waves, the split application provides more reliable control. Permit offers new opportunities to effectively control Cyperus esculentus in maize and thus closes an important gap in the weed spectrum of currently available maize herbicides.

【 授权许可】

Unknown