Development of Oryzophagus oryzae (Costa Lima) in rice cultivars

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dc.creatorCrislaine Barcellos de Lima
dc.creatorAnderson Dionei Grützmacher
dc.creatorJuliano de Bastos Pazini
dc.creatorFernando Felisberto da Silva
dc.creatorAna Paula Schneid Afonso da Rosa
dc.creatorJosé Francisco da Silva Martins
dc.date2019
dc.date.accessioned2026-07-07T04:32:41Z
dc.descriptionInsect-resistant cultivars are essential for improving the management of pests such as Oryzophagus oryzae (Coleoptera: Curculionidae), which significantly decreases flooded rice yields. However, the degree of benefit brought to the crop varies with the type of resistance. This study aimed to evaluate the resistance of rice cultivars to O. oryzae, inferring about antixenosis and antibiosis effects on the development of larvae and adults. Under natural infestation conditions, a biennial experiment was carried out using a latin square design, with six treatments (cultivars) and plots with 30 plants (five rows of six plants equidistant 20 cm) irrigated with water depth of 15 cm. The number and weight of larvae by size, as well as the number, weight, emergence rate, and sex ratio of adults, were evaluated using standard soil, plant and root samples. Except for adult sexual ratio, the cultivars differed (p ≤ 0.05) for the other variables, whose relationship evidenced antibiosis effects at the larval stage, making possible to conclude that: the BRS Firmeza cultivar has resistance to O. oryzae due to antixenosis and/or antibiosis effects; BRS Ligeirinho is susceptible to this insect species, resulting in a relatively higher number of well-developed larvae and adults; and IRGA 417 shows an antibiosis action, restricting the adult emergence rates. The weight of adults gives a greater accuracy to the evaluation of the harmful effects of rice cultivars on the O. oryzaedevelopment.
dc.formatapplication/pdf
dc.identifier1517-6398
dc.identifierhttps://www.redalyc.org/articulo.oa?id=253067965021
dc.identifierhttps://www.redalyc.org/journal/2530/253067965021/
dc.identifierhttps://www.redalyc.org/journal/2530/253067965021/html/
dc.identifierhttps://www.redalyc.org/journal/2530/253067965021/253067965021.epub
dc.identifierhttps://www.redalyc.org/journal/2530/253067965021/movil
dc.identifierhttps://doi.org/10.1590/1983-40632019v4953397
dc.identifier.urihttp://hdl.handle.net/123456789/464756
dc.languageen
dc.publisherUniversidade Federal de Goiás
dc.relationhttp://www.redalyc.org/revista.oa?id=2530
dc.rightsPesquisa Agropecuária Tropical
dc.sourcePesquisa Agropecuária Tropical (Brasil) Vol.49
dc.subjectAgrociencias
dc.titleDevelopment of Oryzophagus oryzae (Costa Lima) in rice cultivars
dc.typeartículo científico

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Pesquisa Agropecuária Tropical - Universidade Federal de Goiás