Genetically Modified Maize Resistant to Corn Earworm (Lepidoptera: Noctuidae) in Sinaloa, Mexico

Development and application of a quantitative bioassay to evaluate maize silk resistance to corn earworm herbivory among progenies derived from Peruvian landrace Piura

“…Currently, control of CEW on maize is largely achieved by planting transgenic varieties expressing insecticidal crystal proteins [4–7], by planting varieties with native resistance properties [8], or by application of pesticides [9]. Pesticide applications for control of CEW must be carefully timed to reach larvae before they tunnel down the silk channel, which requires frequent applications to achieve control [10].…”

Incidencia y severidad de pudrición de mazorcas de maíz genéticamente modificado y convencional en Sinaloa, México

“…Crop protection to lepidopteran attack, assessed through ear damage by corn earworm H.zea, was demonstrated in this GM hybrid in 2013, at the same time with the assessment of ear rot for this agricultural area by Aguirre et al (2015); who demonstrated the effectiveness of inserted proteins in corn on earworm observing that these hybrids conferred resistance to attack of this pest by killing it or reducing its growth causing less damage to corn; effect that confers to corn an indirect additional benefit, because preventing damage by infestations of corn earworm and reducing the damage on the cob, also reduces the formation of entry points for pathogenic fungi that develop in susceptible tissue, causing a reduction in contamination of corn kernels that produce rots caused by Fusarium compared to conventional maize plants, which under favorable conditions ear rot can make the difference evaluación de la pudrición de mazorca para esta zona agrícola por Aguirre et al (2015); quienes demostraron la eficacia de las proteínas insertadas en el maíz sobre el gusano elotero, observándose que estos híbridos le confieren resistencia al ataque de esta plaga matándola o reduciendo su crecimiento causando menor daño al elote; efecto que le confiere al maíz un beneficio adicional indirecto, pues al prevenir el daño por infestaciones de gusano elotero y reducir el daño en la mazorca, también reduce la formación de puntos de entrada para hongos fitopatógenos que se desarrollan en el tejido susceptible, ocasionando una reducción en la contaminación de granos de maíz que producen podredumbres causados por Fusarium comparado con plantas de maíz convencional, lo cual; bajo condiciones favorables para la pudrición de mazorca puede hacer la diferencia entre un cultivo con rendimientos bajos o una buena cosecha, principalmente en regiones donde la enfermedad es favorecida por la alta humedad en el ambiente.…”

Evaluation of Foliar Damage bySpodoptera frugiperda(Lepidoptera: Noctuidae) to Genetically Modified Corn (Poales: Poaceae) in Mexico

“…Mexico is the center of origin of over 61 native races of corn (Reyes 1990;Matsuoka 2005;CONABIO 2006;Kato et al 2009), and there is concern that GM corn could jeopardize those races (Kato-Yamakake 2004;Serratos-Hernández et al 2004;Turrent et al 2010); however, Baltazar et al (2015) suggest that measures such as spatial isolation could minimize contamination risks. More information is needed in Mexico to validate if the Bt Cry proteins of GM corn are effective in controlling the crop pests under various environmental conditions beyond those reported by Aguirre et al (2015a) to control corn earworm in the state of Sinaloa and by Aguirre et al (2015b) to control S. frugiperda in the state of Tamaulipas. Thus, the objective of this study was to evaluate foliar damage in corn hybrids with Cry1Ab, Vip3Aa20, and mCry3A toxins from B. thuringiensis to control S. frugiperda larvae in Sinaloa, Mexico, during 3 growing seasons.…”