Evaluation of the effect of essential oil formulations from Eucalyptus species against Arion spp.

Introduction- Slugs of the genus Arion are important pests of many crops, causing considerable decreases in yields. Given the need to meet food demand worldwide, it is important to have pest management systems, plant resources are natural alternatives for this purpose. Objective- Evaluate the effect of formulations of essential oils of Eucalyptus globulus and Eucalyptus cinerea in the control of Arion spp. Methodology- Two trials were developed with completely randomized designs with 5 treatments and 10 repetitions (one for the effect by contact and the other for ingestion), spraying on Arion spp. slugs, concentrations at 100 and 200 ppm of essential oils of Eucalyptus globulus or Eucalyptus cinerea. The corresponding analyzes of variances were carried out. Results- The affectation of mobility for Arion spp., was very similar for all treatments. The formulations of both species of Eucalyptus caused mortality of Arion spp by contact since the 9th day and by ingestion on the 4th day, higher than 85% by contact, and 95% by ingestion. The TL50. per contact varied between 10.31 and 10.12 days for the essential oil of E. globulus and between 13.31 and 6.69 days for that of E. cinerea, while by ingestion they ranged between 7.31 and 5.55 days for E. globulus and between 8.22 and 6.6 days for E. cinerea at 100 and 200 ppm respectively. Conclusions- The formulations of both Eucalyptus species caused mortality by contact since the 9th day and by ingestion since the 4th day, while the TL 50 were relatively lower by ingestion for E. globulus