Process for the control of weeds

#The present invention relates to a new process for the control of weeds in useful plant cultivations, for example in the cultivation of maize, soya, cotton, rape, beet and sugar cane, which are resistant to phospho-herbicides.

#The phospho-herbicides glufosinate and glyphosate are described for example in The Pesticide Manual, Tenth Edition, 1994, Crop Protection Publications, BCPC. In addition, the following herbicides are similarly known: prosulfuron, primisulfuron, dicamba, pyridate, dimethenamide, metolachlor, fluometuron, propaquizafop, atrazine, ametryn, terbutylazine, simazine, clodinafop, norflurazone, as well as prometryn. The S-enantiomer of metolachlor is known from U.S. Pat. No. 5,002,606; the S-enantiomer of dimethenamide from U.S. Pat. No. 5,457,985. The metabolite NOA-402989 is known from the Zeitschrift für Pflanzenkrankheiten und Pflanzenschutz, Sonderheft X, 355-360 (1984) as 3-phenyl-4-hydroxy-6-chloropyridazine. The compound of formula

#is described for example in U.S. Pat. Nos. 4,671,819; 5,183,492 discloses the compound of formula

#The following examples illustrate the invention further without restricting it.

#(%=percent by weight)

#F1. Emulsion concentrates a) b) c) d) active ingredient mixture 5% 10% 25% 50% Ca dodecylbenzene sulphonate 6% 8% 6% 8% castor oil polyglycol ether 4% — 4% 4% (36 mols EO) octylphenol polyglycol ether — 4% — 2% (7-8 mols EO) cyclohexanone — — 10% 20% arom. hydrocarbon mixture 85% 78% 55% 16% C9-C12