Responses of Dalbulus maidis (Delong and Wolcott, 1923) to electromagnetic spectra
DOI:
https://doi.org/10.33158/ASB.r271.v12.2026Keywords:
Corn leafhopper, luminous attractiveness, maize, phototaxis, corn leafhopper, pests of maize, natural attraction of insects, nocturnal flying insectsAbstract
The knowledge on the responses to Dalbulus maidis to electromagnetic spectra emitted by low-cost LED lamps may lead to development of traps to sample the pest. This study deals to the responses of adult D. maidis to LED lamps emitting different wavelengths in a dark chamber in the laboratory. Initially, pair comparison of LED “cold white” (6,000-6,500 K), “warm white” (3,000-3,500 K), “full spectrum” (400-840 nm) and ultraviolet (365 nm) were performed. The most attractive lamp was suggested as “standard”. The suggested LED lamp was then used in pair comparisons vs: 365, 375, 385, 410, 415-420, 420-430, 445-450, 460-465, 470, 477-480, 520, 550, 552-556, 570, 595-600, 600-605, 620-625, 660, 730, 850 nm. Another similar assay evaluated the responses for wavelengths lamps placed individually in the chamber. The most attractive lamps were also assessed regarding the captures of both sexes. Overall, LED lights that emitted UV and blue spectrum (365 nm to 430 nm wavelengths) attracted D. maidis adults in both assays. In two-choice assay, wavelengths from 415-430 nm were more attractive than the standard 365 nm (more than 67%). The proportion of insects attracted by wavelengths from 445 to 625 nm ranged from 23.5 to 42.3%. From 660 nm, the lowest insect attractions occurred (from 0 to 1.9%). For the LED lamps tested individually, wavelengths from 365 to 430 nm were more attractive than the remaining ones. Lamps captured both sexes and captures were similar for each lamp. Further investigations and using the findings on IPM programs are suggested.
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