RESISTÊNCIA DE VARIEDADES DE CANA-DE-AÇÚCAR À Spodoptera frugiperda

Abstract

The sugarcane crop (Saccharum officinarum L.) is subject to the development of several pests and pathogens among the pests that cause damage to the crop, Spodoptera frugiperda (Lepidoptera, Noctuidae) was observed causing economic damage in nurseries of pre-sprouted seedlings (MPB). In search of the control of S. frugiperda, an alternative method is the resistance of plants to insects. The main objective of the study was to identify sugarcane varieties that have a mechanism of resistance to the S. frugiperda. The experimental research was carried out at the Agricultural Entomology Laboratory of the Instituto Federal Goiano – Campus Urutaí to evaluate the levels of resistance in sugarcane varieties to S. frugiperda, 17 varieties of pre-sprouted seedlings were used. The experiment was installed in a completely randomized design (DIC), with 17 treatments, using antibiosis assay and antixenosis assay, performed with and without choice. In the antixenosis assay, the attractiveness of the varieties to S. frugiperda caterpillars at different time intervals were evaluated. In the antibiosis assays, larval viability, duration of the larval stage and weight of caterpillars at ten days of age, viability and pupal period and weight of pupae at 24 hours were evaluated. In the antixenosis tests, the varieties RB 03 6088, RB 98 7935, CTC 9001, IAC SP 95 5000 and RB 97 5209 were the most attractive to caterpillars. In the antibiosis assay, the varieties RB 966928, VAT 90212, VIGNIS 4, VIGNIS 7, RB 92579 and IAC SP 9550948 provided the lowest caterpillar viability. While the RB 127825, IAC SP 955000 and RB 036091 varieties appear to be susceptible to S. frugiperda.