Busck's stalk borer

Diatraea busckella is a moth species belonging to the family Crambidae. It is recognized as a significant pest in agricultural sectors, particularly impacting large-scale cereal crop production in tropical and subtropical regions where the climate favors its rapid development.

The primary hosts of this insect are corn (maize) and sugarcane. The larvae are borers that tunnel into the stems of these plants to feed on the internal pith. This internal feeding pattern disrupts the plant's vascular system, hindering the transport of water and essential nutrients throughout the crop.

Regarding its biological cycle, the pest undergoes complete metamorphosis. Female moths typically deposit their eggs in clusters on the leaves. Once hatched, the larvae migrate to the stalks and bore inside, where they complete their development, making them highly resistant to traditional foliar insecticide applications.

The damage caused by Diatraea busckella includes physical weakening of the stem, which leads to lodging during wind events. Furthermore, the tunneling activity facilitates the entry of secondary fungal pathogens, which may cause stalk rot, significantly reducing both the quality and the total yield of the harvested crop.

Management strategies focus on an integrated approach to reduce population numbers. This includes the implementation of cultural practices such as destroying crop residues post-harvest, selecting resistant or genetically modified hybrids, and the use of biological control agents like Trichogramma wasps to parasitize eggs.