Abstract: The present invention provides methods and compositions for improving plant health. In particular, application of dicamba or another substrate of DMO, or metabolites thereof including DCSA, to a plant confers tolerance to, or defense against, abiotic or biotic stresses such as oxidative stress including herbicide application, and plant disease, and enhances crop yield. Such application may be in combination with the application of another herbicide such as glyphosate.

Abstract: The present invention provides methods and compositions for improving plant health. In particular, application of dicamba or another substrate of DMO, or metabolites thereof including DCSA, to a plant confers tolerance to, or defense against, abiotic or biotic stresses such as oxidative stress including herbicide application, and plant disease, and enhances crop yield. Such application may be in combination with the application of another herbicide such as glyphosate.

Abstract: This invention relates to novel herbicidal compositions containing (i) a herbicidally effective amount of a herbicidal compound selected from atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)S-triazine] and cyanazine [2-chloro-4-(1-cyano-1-methylethylamino)-6-ethylamino-S-triazine] and (ii) an antidotally effective amount of an antidotal compound having the formula ##STR1## wherein R, R.sub.1 and R.sub.2 are as defined herein. This invention also relates to methods for protecting cotton plants from injury due to conventional herbicides and for the selective control of undesirable vegetation in cotton crops by application of the novel herbicidal compositions.