Methods for control of hemipteran insect stylet sheath structure formation

Compositions having at least one compound which inhibits the formation of Hemipteran stylet sheaths and/or degrades hemipteran style sheaths that have already been formed, and thus deters or blocks hemipteran insects from feeding on plants, especially agriculturally important plants and methods of use of such compositions are described. Such compositions can be applied onto plants by spraying, dripping, or other methods and/or can be applied to the soil for uptake by the roots. These compositions and methods prevent and/or reduce the transmission of vascular associated diseases (caused by hemipteran vector-borne pathogens) to plants.