Corn-stunt
Guides
Dalbulus elimatus
Mexican corn leafhopper
Dalbulus elimatus (Ball, 1900), the Mexican corn leafhopper, is a specialist herbivore of maize (Zea mays) and closely related grasses in the genus Tripsacum. It is a significant agricultural pest in Mexico and Central America, transmitting three major corn stunting pathogens: corn stunt spiroplasma (Spiroplasma kunkelii), maize bushy stunt phytoplasma, and maize rayado fino virus. The species exhibits r-selected life history traits characteristic of annual plant specialists, with rapid development (approximately 27 days egg to adult on maize) and high fecundity. It serves as host for multiple parasitoid species including the pipunculid fly Eudorylas subopacus and the dryinid wasp Gonatopus bartletti, which parasitize adults, as well as several mymarid and trichogrammatid wasps that attack eggs.
Dalbulus maidis
corn leafhopper, cigarrinha-do-milho, chicharrita del maíz
Dalbulus maidis is a phloem-feeding leafhopper and one of the most significant pests of maize production across the Americas. It serves as the primary vector of the corn stunt disease complex, transmitting at least four pathogens including Spiroplasma kunkelii, maize bushy stunt phytoplasma, and Maize rayado fino virus. The species exhibits strict host specialization with Zea mays, enabling highly efficient pathogen transmission. Population outbreaks can cause yield losses exceeding 80% in affected regions. The species has become increasingly problematic in Argentina and Brazil, particularly under intensive continuous maize cultivation systems.