Resistance in rice to Tibraca limbativentris (Hemiptera: Pentatomidae) influenced by plant silicon content

Authors

  • Lincoln Luis França University of Goias State, Unidade Universitária de Ipameri, Rodovia GO 330, Km 241, 75780-000, Ipameri, Goiás, Brazil;
  • Cássio Antonio Dierings Federal Goiano Institute, Campus Urutaí, Rodovia Prof. Geraldo Silva Nascimento, 75790-000, Urutaí, Goiás, Brazil;
  • André Cirilo de Sousa Almeida Federal Goiano Institute, Campus Urutaí, Rodovia Prof. Geraldo Silva Nascimento, 75790-000, Urutaí, Goiás, Brazil;
  • Marcio da Silva Araújo University of Goias State, Unidade Universitária de Ipameri, Rodovia GO 330, Km 241, 75780-000, Ipameri, Goiás, Brazil;
  • Elvis Arden Heinrichs Department of Entomology, University of Nebraska, Entomology Hall, Lincoln, Nebraska 68583-0816, USA;
  • Anderson Rodrigo da Silva Federal Goiano Institute, Campus Urutaí, Rodovia Prof. Geraldo Silva Nascimento, 75790-000, Urutaí, Goiás, Brazil;
  • José Alexandre Freitas Barrigossi Embrapa Rice and Beans, Rodovia GO-462, Km 12, Zona Rural, 75375-000, Santo Antônio de Goiás, Goiás, Brazil;
  • Flávio Gonçalves de Jesus Instituto Federal Goiano - Campus Urutaí

Keywords:

rice stalk stink bug, plant resistance to insects, induced resistance, Oryza sativa

Abstract

Tibraca limbativentris Stål (Hemiptera: Pentatomidae) is a major pest causing economic losses to rice cultivation in Brazil. The objectives of this work were to assess different sources of silicon in the induction of plant resistance, to examine the interaction of rice varieties with silicon-based resistance, and to determine the effects of varieties and silicon on stink bug biology. The interaction of rice cultivars BRS Esmeralda, IRGA 429 (widely cultivated in Brazil), and Canela de Ferro (a resistant cultivar), and 2 sources of silicon (K silicate, and Ca + Mg silicate) were studied. Plant parameters measured were percentage of damaged stems, chlorophyll content at 50 and 65 d after emergence, and silicon content. Insect biological parameters measured were the number of live insects, total dry mass, individual insect dry mass, total body surface area, and individual insect body surface area. The interaction between BRS Esmeralda with K silicate and Ca + Mg silicate provided greater plant silicon content and resulted in a lower level of stink bug-damaged stems. These results show that it is possible to increase resistance in rice plants susceptible to T. limbativentris by increasing silicon content.

 

Resumen

Tibraca limbativentris Stål (Hemiptera: Pentatomidae) es una plaga importante que causa pérdidas económicas al cultivo de arroz en Brasil. El objetivo de este trabajo fue estudiar la interacción de variedades de arroz con diferentes niveles de resistencia y fuentes de silicio en la inducción de la resistencia de las plantas y el efecto sobre la biología de los chinches. Se estudió la interacción de los cultivares de arroz BRS Esmeralda, IRGA 429 (ampliamente cultivado en Brasil), y Canela de Ferro (Resistente), y 2 fuentes de silicio (silicato de K y silicato de Ca + Mg). Los parámetros de la planta medidos fueron: el porcentaje de tallos dañados, el contenido de clorofila a los 50 y 65 días después de la emergencia y el contenido de Si. Los parámetros biológicos de insectos medidos fueron: el número de insectos vivos, la masa seca total, la masa seca de insecto individual, la superficie corporal total y la superficie corporal de insectos individual. La interacción entre BRS Esmeralda con silicato K y silicato de Ca + Mg proporcionó más contenido de silicio vegetal y resultó en un menor porcentaje de tallos dañados por el chinche hedionda. Las variedades de arroz con diferentes niveles de resistencia y el aumento del contenido de silicio en la planta es una opción prometedora en el control de T. limbativentris. Estos resultados muestran que es posible aumentar la resistencia en las plantas de arroz susceptibles a T. limbativentris al aumentar el contenido de silicio.

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Author Biography

Flávio Gonçalves de Jesus, Instituto Federal Goiano - Campus Urutaí

Tibraca limbativentris is a major pest causing economic losses to rice cultivation in Brazil. The objective of this work was to study the interaction of rice varieties with different levels of resistance and sources of silicon in the induction of resistance and the effect on stink bug biology. The rice cultivars BRS Esmeralda and IRGA 429 (widely cultivated in Brazil) and Canela de Ferro (Resistant) and two sources of Si (K Silicate and Ca + Mg Silicate) were evaluated. Plant parameters measured were: percentage of damaged stems, chlorophyll content at 50 and 65 days after emergence and silicon content. Insect biological parameters measured were: number of live insects, total dry mass, individual insect dry mass, total body surface and individual insect body.surface. BRS Esmeralda cultivar with K silicate and Ca + Mg silicate provided more plant Si content and resulted in a lower percentage of stink bug damaged stems. The interaction of rice varieties with different levels of resistance and the increase of the silicon content in the plant is a promising option in the control of T. limbativentris. These results show that it is possible to increase resistance in rice plants, susceptible to T. limbativentris, by increasing Si content.

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Published

2019-02-04

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Section

Research Papers