Mapping of spatiotemporal distribution of Tibraca limbativentris Stal (Hem.: Pentatomidae) in flooded rice crop in Southern Brazil

The rice stem bug, Tibraca limbativentris Stal (Hem.: Pentatomidae), is one of the main insect pests in Brazilian rice crops. Knowledge of its spatiotemporal distribution can support the development of an effective sampling system and improve IPM strategies. This study aimed to map the spatiotempora...

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Bibliographic Details
Published in:Revista Brasileira de Entomologia 2019-07, Vol.63 (3), p.205-211
Main Authors: Costa, Helen da Silva, Seidel, Enio Júnior, Pazini, Juliano de Bastos, Silva, Augusto Maciel da, Silva, Fernando Felisberto da, Martins, José Francisco da Silva, Barrigossi, José Alexandre Freitas
Format: Article
Language:English
Subjects:
Adults
Categories
Cereal crops
Crops
ENTOMOLOGY
Insect ecology
Insects
Interpolation
Mapping
Multiquadric equations
Oryza
Oryza sativa L
Pentatomidae
Pest monitoring
Pests
Rice
Rice fields
Rice stem bug
Sampling
Spatial distribution
Temporal distribution
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Summary:The rice stem bug, Tibraca limbativentris Stal (Hem.: Pentatomidae), is one of the main insect pests in Brazilian rice crops. Knowledge of its spatiotemporal distribution can support the development of an effective sampling system and improve IPM strategies. This study aimed to map the spatiotemporal distribution of rice stem bug in flooded rice crop in Southern Brazil. Flooded rice crop was scouted for two seasons to estimate insect densities. Four occurrence categories were observed: no insect, only adults, only nymphs, and both phases. The relationship between phenological stages and insect categories was established. Interpolation (mapping) of occurrence categories of T. limbativentris was performed by multiquadric equations. In two seasons during the rice cycle, the results indicate that rice stem bug “adults” were the most abundant category until the mid-vegetative phase of the rice; “nymphs” were the most abundant from the end of vegetative phase; “adults+nymphs” occurred from the beginning of reproductive phase; there were no rice stem bugs in more than 66% of the area, as they were most concentrated near the edge of the crop. The information presented here provides further knowledge about T. limbativentris spatiotemporal dynamics that can be applied to improve IPM strategies, such as developing sampling plans and localized control measures at the edge of rice fields.
ISSN:0085-5626
1806-9665
1806-9665
DOI:10.1016/j.rbe.2019.04.001