Occurrence in field and development lab Spodoptera frugiperda (J.E. Smith) (Noctuidae) in corn with organic fertilizer and chemical.

Abstract

The occurrence of pests in agriculture varies with the culture conditions, establishing relation with the form of fertilization and the health of the plants. It was objectified thus, checking the infestation of Spodoptera frugiperda in field corn fertilized with organic and chemical fertilization, and study in the laboratory the development of these when fed with corn leaves from such plants in three treatments: chemical fertilization, organic fertilization and without fertilization. It was observed higher infestation in corn plots under chemical fertilization than in organic fertilization and without fertilization. In the experiment in biology lab compared there was a higher larval and pupal period, and lower weight of pupae, caterpillars fed on corn leaves with organic fertilizer. It was concluded that the infestation of S. frugiperda is lower in corn under organic fertilization, and that this species is developing longer and higher mortality when fed on leaves that originated fertilization.