Influence of temperature and maize genotypes on the population dynamics of Sitophilus zeamais Motschulsky 1885 (COLEOPTERA: CURCULIONIDAE) and grain quality during storage

IF 2.7 2区农林科学 Q1 ENTOMOLOGY

Journal of Stored Products Research Pub Date : 2025-02-06 DOI:10.1016/j.jspr.2025.102564

Diaine Cortese , Gisele Silva de Oliveira , Marcos Gino Fernandes

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引用次数: 0

Abstract

Post-harvest losses in maize caused by Sitophilus zeamais represent a significant challenge to global grain storage systems. This study investigated the effects of temperature and corn genotype on S. zeamais population dynamics during six months of storage. Eight maize genotypes (Nutricional Embrapa, Cinquentinha, Palha Roxa, Sol da Manhã, Roxo, BR 451 QPM, Catingueira, and Asteca Vermelho) were evaluated under four temperature regimes (15, 20, 25, and 30 °C). Parameters assessed included insect emergence, weight, grain weight loss, and residual weight. Chemical composition (starch, protein, and lipid content) was analyzed to explore potential resistance mechanisms. Temperature significantly influenced S. zeamais development. Low temperatures (15 °C) suppressed insect emergence and grain degradation across all genotypes, while higher temperatures (25–30 °C) amplified pest activity, particularly in susceptible genotypes (Cinquentinha, Palha Roxa). Resistant genotypes (Nutricional Embrapa, Asteca Vermelho) consistently demonstrated reduced insect emergence, weight, and grain losses, likely due to enhanced kernel hardness, biochemical defenses, and nutritional profiles. Lipid and protein content varied significantly among genotypes, influencing pest feeding efficiency and reproduction. Susceptible genotypes showed higher weight loss and residual grain mass, exacerbated by fungal contamination at higher temperatures. The integration of resistant genotypes and temperature management effectively mitigates S. zeamais infestations, preserving grain quality and reducing post-harvest losses. These findings underscore the importance of genotype selection in integrated pest management and highlight the need for further research into the genetic and biochemical traits associated with resistance. Combining resistant genotypes with sustainable storage practices offers a promising strategy for grain preservation in diverse environmental conditions.

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来源期刊

Journal of Stored Products Research 生物-昆虫学

CiteScore

5.70

自引率

18.50%

发文量

112

审稿时长

45 days

期刊介绍： The Journal of Stored Products Research provides an international medium for the publication of both reviews and original results from laboratory and field studies on the preservation and safety of stored products, notably food stocks, covering storage-related problems from the producer through the supply chain to the consumer. Stored products are characterised by having relatively low moisture content and include raw and semi-processed foods, animal feedstuffs, and a range of other durable items, including materials such as clothing or museum artefacts.