Resumo

SILVA-MARTINEZ, Christian et al. Sampling program for the sugarcane aphid, Melanaphis sacchari (Zehntner)), in sorghum. Ecosistemas y recur. agropecuarios [online]. 2019, vol.6, n.18, pp.565-571.  Epub 20-Fev-2020. ISSN 2007-901X.  https://doi.org/10.19136/era.a6n18.2048.

This study was conducted with the aim of developing a sampling program for the sugarcane aphid (Melanaphis sacchari Zehntner). This pest is currently the most economically important in sorghum cultivation in Mexico and other countries. Five samplings of the pest were made in 10 sorghum farms in the Comarca Lagunera. The variance (S2)-media (m)ratio for the number of aphids was determined using the Taylor Power Law model and the optimal sample sizes were estimated. Maximum densities varied from 394.7 to 754.1 aphids per leaf in July. Through the regression model obtained [log (S2) = 0.4374 + 1.6513 log (m), r2 = 0.98], it was determined that for the sampling of the sugarcane aphid in sorghum, at least 39 leaves must be inspected per farm, with an accuracy of 80%.

Palavras-chave : Density; infested leaves; economic importance; inspect; maximum averages.

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