Insect incidence and soybean yield under sustainable and conventional production systems in midwestern Santa Catarina
DOI:
https://doi.org/10.52945/rac.v38i2.2029Keywords:
sustainability, integrated pest management, Glycine max L.Abstract
Brazil is the world’s largest soybean producer and exporter, a promising scenario that can last by adopting sustainable production systems that meet current consumer needs. This work compared the incidence of pest insects and natural enemies, the number of insecticide sprays and grain yield in soybean areas under sustainable and conventional production systems in midwestern Santa Catarina for the agricultural years of 2018, 2019, 2020 and 2021. The sustainable system adopted integrated pest management (IPM), with insecticide spray applied when pest population reached the economic threshold. As for the conventional system, pest management was achieved with prophylactic use of insecticides (sprays every 15 days). Pest insects and natural enemies were sampled weekly in both systems using a beat cloth from V4 to pre-harvest and yield was measured at physiological maturation. Incidence of Spodoptera spp. and stinkbugs was higher in the sustainable system for the 2018/19 and 2020/21 agricultural years; however, occurrence of natural enemies was also higher in three of the four agricultural years evaluated due to an 86% reduction in insecticide spray in the referred system. Yield under the sustainable system was similar or superior to the conventional system in three of the four agricultural years evaluated, showing that sustainable production systems with IPM adoption can provide satisfactory yields combined with less environmental impact.
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- Epagri - Revista Agropecuária Catarinense
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- Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina - Epagri
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