Infestation levels of Sternechus subsignatus Boheman, 1836; effect on yield and agranomic characteristics of soybean.

Authors

  • Clara Beatriz Hoffmann Campo
  • Edilson Bassoli de Oliveira
  • Regina Maria Mazzarin
  • Maria Cristina Neves de Oliveira

DOI:

https://doi.org/10.1590/S1678-3921.pab1990.v25.13373

Keywords:

cages, phenological stages, adults, damaged plants

Abstract

uring the 1983/84, 1984/85, 1985/86 and 1986/87 soybean growing seasons, field experiments were conducted to evaluate the effect of five infestation levels of Sternechus subsignatus Boheman on plant population, number of damaged plants, plant height, insertion of first pod, and yield. Infestation was made on caged soybean plants at two phenological stages of development (V3 e V6). Infestations of one adult/m of row at V3 and two adults/m of row at V6 caused signifscant reductions on yield and plant height when compared to uninfested plants. Increasing number of insects/m increased damaged plants and decreased plant population. Significant positive correlations were observed between yield, plant population and plant height. A significant negative correlation was obtained for yield and number of damaged planta

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How to Cite

Campo, C. B. H., Oliveira, E. B. de, Mazzarin, R. M., & Oliveira, M. C. N. de. (2014). Infestation levels of Sternechus subsignatus Boheman, 1836; effect on yield and agranomic characteristics of soybean. Pesquisa Agropecuaria Brasileira, 25(2), 221–227. https://doi.org/10.1590/S1678-3921.pab1990.v25.13373

Issue

v.25, n.2, fev. 1990

Section

ENTOMOLOGY