Biological Control of the Black Weevil (Cosmopolites sordidus) with the Entomopathogenic Nematode Heterorhabditis bacteriophora Under Greenhouse Conditions in Banana Cultivation
DOI:
https://doi.org/10.53591/iti.v2i2.1155Keywords:
biological control, nematodes, Heterorhabditis bacteriophora, Cosmopolites sordidus, mortality, efficiencyAbstract
The objective of this study was to evaluate the effect of the nematode Heterorhabditis bacteriophora on larvae of the black weevil (Cosmopolites sordidus) under greenhouse conditions. A bioassay was conducted, involving direct inoculation of the nematode into the rhizome area of banana plants infested with black weevil larvae. The tested doses were 0, 75,000, 100,000, and 125,000 nematodes/m², arranged in a randomized complete block design. The number of dead larvae per plant was recorded at six and ten days after nematode application. The evaluated variables included larval mortality, nematode multiplication, and dose efficiency. The dose that caused the highest mortality in black weevil larvae was 125,000 nematodes/m², resulting in 91.67% dead larvae ten days after application. When analyzing dose efficiency, all concentrations were effective at ten days, with 125,000 nematodes/m² showing the highest efficacy (93.33% dead larvae), compared to the control group, which exhibited no larval mortality.
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