The corn leafhopper, Dalbulus maidis (DeLong and Wolcott) (Hemiptera: Cicadellidae), is an invasive insect that can cause damage to maize (Zea mays L.) in two ways: by direct feeding and the transmission of several plant pathogens. Dalbulus maidis is an invasive and serious economic pest of maize that has spread from its center of origin in Mexico to the southernmost parts of the United States. Prior to 2024, corn leafhoppers had not been documented in Oklahoma, and their spread northward toward the United States corn belt is of significant concern. Here, we provide the first reports of the insect in maize in several Oklahoma counties. Insect specimens were collected at various commercial and experimental field sites by Oklahoma State University research and extension personnel. The identity of the insect species was validated through morphological and molecular taxonomy. The presence records for the corn leafhopper presented here provide valuable information for future monitoring and management efforts of this economically important pest and disease.

Sclerotinia blight is one of the most widespread and economically damaging diseases of peanut (Arachis hypogaea L.), causing significant crop losses in cooler production areas across the world. In the U.S., Sclerotinia blight caused by Sclerotinia minor has been an issue for producers for over 50 years and remains troublesome with regards to inheritance of resistance, management strategies, and resistant germplasm sources. This review provides an overview of the disease on peanut, progress towards the identification of genomic regions responsible for resistance, and the development of resistant cultivars in the U.S.