The corn leafhopper Dalbulus maidis (DeLong & Wolcott) (Hemiptera: Cicadellidae) poses a serious threat to the crop, causing direct and indirect damage to plants. The present study aimed to investigate the possible expression of resistance by antixenosis and/or antibiosis against D. maidis in 11 corn genotypes [8 non-Bt (60XB14, 90XB06, XB 9003, XB 8018, XB 8010, IAC 8390, IAC 8046, and IAC AIRAN) and 3 Bt (XB 7116 Bt, XB 8010 Bt, and DKB 310 Bt)] previously selected in a greenhouse. Initially, no choice preference tests for oviposition were performed to characterize the expression of antixenosis. To characterize the expression of antibiosis/antixenosis, the insects were confined to leaves of different genotypes to assess the following parameters: duration of each nymphal stage, nymphal period, viability per instar, total viability, and adult longevity. Additionally, morphological and physical analyses of the genotypes were carried out to establish correlations with the resistance categories. The genotypes 90XB06, IAC 8390, XB 9003 and DKB 310 PRO3 expressed antixenosis against leafhoppers, reducing insect oviposition. The genotypes 60XB14, 90XB06, IAC 8046, XB 8018 and IAC 8390 expressed antibiosis and/or antixenosis against leafhoppers, reducing nymphal viability. The hardness of the ribs is probably associated with the resistance of some of the evaluated genotypes and is an important morphological defense against leafhoppers. The results of this study are novel and can aid in corn-breeding programs focused on plant resistance to sucking insects, with relevant impacts on the integrated pest management of the crop.

玉米叶蝉Dalbulus maidis（DeLong＆Wolcott）（半翅目：Cicadellidae）对作物构成严重威胁，对植物造成直接和间接损害。本研究的目的是调查由antixenosis和/或抗菌性的可能表达针对D.蚜在11个玉米基因型[8非转Bt（60XB14，90XB06，XB 9003，XB 8018，XB 8010，IAC 8390，IAC 8046，和IAC AIRAN）和3 Bt（XB 7116 Bt，XB 8010 Bt和DKB 310 Bt）]之前在温室中选择的。最初，没有进行针对产卵的选择偏好测试来表征抗异位症的表达。为了表征抗生/抗异位的表达，将昆虫限制在不同基因型的叶子上，以评估以下参数：每个若虫阶段的持续时间，若虫时期，每龄的存活率，总存活率和成年寿命。另外，对基因型进行形态和物理分析以建立与抗性类别的相关性。基因型90XB06，IAC 8390，XB 9003和DKB 310 PRO3对叶蝉表现出抗异位作用，减少了昆虫的产卵。基因型60XB14、90XB06，IAC 8046，XB 8018和IAC 8390对叶蝉表现出抗生和/或抗生性，降低了若虫的生存能力。肋骨的硬度可能与某些评估的基因型的抗性相关，并且是对叶蝉的重要形态防御。这项研究的结果是新颖的，可以帮助玉米育种计划侧重于植物对吮吸昆虫的抗性，并对作物的综合病虫害管理产生相关影响。