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(Trianthema portulacastrum ); Pursley, Florida(Richardia scabra ); Radish, wild(Raphanus raphanistrum ); Ragweed, common(Ambrosia artemisiifolia); Ragweed, giant(Ambro› sia trifida); Redstem(Ammania auriculata); Ricefield bul› rush(Scirpus mucronatus); Sesbania, hemp(Sesbania exal› tata); Sharppoint fluvellin*, (Kickxia elatine); Shepherd’s purse(Capsella bursa pastoris); Sicklepod(Cassia obtusifo› lia ); Sida, prickly(Sida spinosa ); Smallflower umbrella sedge(Cyperus difformis); Smartweed, Annual(Polygonum spp.); Smartweed, Pennsylvania(Polyfonum pennsylvani› cum ); Sowthistle, annual(Sonchus oleraceus); Sprangletop (Leptochloa fascicularis); Sun flower(Helianthus annuus); Sun flower(Helianthus spp.); Tansymustard(Descurainia pinnata); Texasweed(Caperonia palustris); Thistle, Canada (Cirsium arvense); Thistle, Russian(Salsola iberica); Vel› vetleaf(Abutilan theophrasti); Wallflower, bushy(Erysimum repandum); Water hyssop (Bacopa. spp); Waterhemp, com› mon(Amaranthus rudis); Waterhemp, tall2(Amaranthus tuberculatus); Waterhemp(Amaranthus spp); Willow herb, common(Epilobium ciliatum ); Willowherb(Epilobium cilia› tum ); Yellowcress, creeping(Rorippa sylvestris), or combi› nations thereof. 

## BRIEF DESCRIPTION OF THE FIGURES 

[0018] FIG. 1 shows trial data of two inventive composi› tions and a commercial herbicide for control of Yellow Nutsedge( Cyperus esculentus ). 

## DETAILED DESCRIPTION OF VARIOUS ASPECTS OF THE DISCLOSURE 

[0019] The present inventors have found that halosulfu› ron-methyl, may be made more stable in liquid compositions by formulating those pesticides with particular diluents and/or surfactants. The liquid compositions generally com› prise halosulfuron-methyl and at least one diluent, and optionally at least one surfactant and/or rheology modifier. The diluent, surfactant, and rheology modifier are generally inert ingredients. The inventors have found, however, that the presence of certain types of hydroxyl groups on these 

components leads to unstable compositions. The composi› tions described herein lose less than 5% (w/w) of halosul› furon-methyl after storing the liquid composition for 8 weeks at 40° C. in a sealed container. The compositions may be applied to any desired environment, such as a lawn, garden, turf grass, agriculture crops, non-crop areas, or ornamentals. 

[0020] The presence of certain hydroxyl groups leads to instability of halosulfuron-methyl pesticide compositions. However, this instability does not result from the presence of OH components that are acidic due to adjacent electron withdrawing groups (e.g., carbonyl, sulfonyl, phosphonyl), or groups where negative charge is spread over a large volume of the group (e.g., phenyl). Rather, particular OH groups having a pKa above 13 have been found to lead to instability when present in a halosulfuron-methyl composi› tion. In the case of surfactants, where the OH group resembles ethanol (pKa=16), as in an OH found on a hydrocarbon chain or at any position on a fatty acid except the carbonyl group, the inventors have found instability. Thus, stability may be predicted by the lack of OH groups on a surfactant compound having an estimated pKa (from tables) of greater than 13. 

[0021] As used herein, the pKa may be estimated by looking to standard charts showing estimated pKa values for specific OH groups, such as the following table: 

<img src='content_image/932698.jpg'>

[0022] The following surfactant compounds include the type of alcohol or hydroxyl group that the inventors have found leads to instability of halosulfuron-methyl pesticide compositions: 

<img src='content_image/932699.jpg'>

