Tolerancia a infestación por gorgojos (Sitophilus spp.) en genotipos de maíz comunes y de alta calidad proteínica

Metabolomic Approaches in Assessing the Insecticidal Activity of the Extracts from Argemone ochroleuca Sweet (Papaveraceae) Against Three Diverse Crop Pests of Economic Importance

“…[5] This insect is widely distributed throughout the world and the damage that it causes is more aggressive in tropical regions with a high percentage of humidity, these being the conditions that bring on its growth and therefore its reproduction. [6,7] It is estimated that in few weeks, after the harvest and storage of maize crops, the insects are capable of causing losses of up to 25 % in the quality of the grain and if the infestation is not controlled, it can lose up to 80 % of its quality in a period of six months. [5,[8][9][10] On the other hand, insects of the Scolytinae subfamily are commonly known as ambrosial beetles, bark beetles, or borer beetles, due to their way of feeding and to the fact that they are a polyphagous species with a tendency for attacking dead, recently cut, dying, weak and sometimes healthy trees.…”

“…The maize weevil, Sitophilus zeamais Motschulsky (Coleoptera : Curculionidae) is an economically important pest that mainly attacks stored products, this insect can easily infest diverse species of cereals grains, such as rice, corn, oats, sorghum, barley, and wheat [5] . This insect is widely distributed throughout the world and the damage that it causes is more aggressive in tropical regions with a high percentage of humidity, these being the conditions that bring on its growth and therefore its reproduction [6,7] . It is estimated that in few weeks, after the harvest and storage of maize crops, the insects are capable of causing losses of up to 25 % in the quality of the grain and if the infestation is not controlled, it can lose up to 80 % of its quality in a period of six months [5,8–10] …”

Susceptibilidad de poblaciones nativas de maíz y preferencia del gorgojo en Yucatán, México

“…En el estado de Yucatán, el maíz forma parte de la alimentación cotidiana, más de 80% se cultiva bajo condiciones de temporal en siembras menores a 1 ha, en sistemas de roza, tumba y quema, la cosecha está destinada en su mayor parte para el autoconsumo y para seleccionar las semillas que serán empleadas en el siguiente ciclo de cultivo, por lo que es relevante conservarlas y mantenerlas en estado óptimo de germinación y libre de plagas (Palafox-Caballero et al, 2008).…”

“…Uno de los principales problemas que enfrenta el productor al almacenar el grano es la pérdida ocasionada por plagas y enfermedades, principalmente el gorgojo de maíz (Sitophilus zeamais Motsch. ), que causa pérdidas hasta del 80% (García- Lara et al, 2003) y es en las regiones del trópico donde se observa mayor el daño, por las condiciones ambientales que favorecen el desarrollo del insecto (Palafox-Caballero et al, 2008).…”

Diversity and trophic structure of insects associated with grains of three maize landraces in San Agustín Loxicha, Oaxaca, Mexico

“…Diversity of insect communities associated with immature maize grains, that is, in harvested cobs, has not been extensively studied, even though colonization by insects, including pests, may start in the field. Insect colonization of seeds is determined by a combination of extrinsic factors (elevation, ambient temperature, relative humidity and geographic region) and intrinsic factors (color, water content, nutrient concentrations, grain hardness and size and testa thickness), all of which influence insect development, abundance and diversity (Palafox-Caballero et al 2008). At higher elevations, insect diversity is lower, mostly due to high relative humidity and low temperatures, these two conditions being unfavorable for insect development (Lawton et al 1987).…”