Mapping of spatiotemporal distribution of Tibraca limbativentris Stal (Hem.: Pentatomidae) in flooded rice crop in Southern Brazil
AUTOR(ES)
Costa, Helen da Silva
FONTE
Rev. Bras. entomol.
DATA DE PUBLICAÇÃO
05/09/2019
RESUMO
ABSTRACT 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.
Documentos Relacionados
- Voláteis liberados por Oryza sativa L. e suas implicações no comportamento quimiotáxico de Tibraca limbativentris Stal. (Hem., Pentatomidae) e parasitóides de ovos
- Distribuição espacial do percevejo-do-colmo (Tibraca limbativentris Stål) em arroz irrigado
- Divergência genética de cultivares de arroz quanto à resistência a Tibraca limbativentris Stål (Hemiptera: Pentatomidae)
- Parasitismo de ovos de Tibraca limbativentris Stal (Hemiptera: Pentatomidae) na cultura do arroz no Maranhão
- Parasitismo de ovos de Tibraca limbativentris Stål (Hemiptera: Pentatomidae) em lavoura de arroz irrigado, Eldorado do Sul, RS