Damage by Tibraca limbativentris (Hemiptera: Pentatomidae) to rice in Southwestern Colombia
Action thresholds for Tibraca limbativentris Stall (TL) on rice were calculated to be 8.8 and 25.8 TL per 10 sweep nets for 30- and 40-day old plants, respectively. Population dynamics of TL at two localities in Valle del Cauca, Colombia, indicated a density of 1.2 TL per sweep (12 TL per 10 sweeps). Densities equal to the calculated action thresholds were not observed in rice fields in Valle del Cauca, Colombia, during the study period. Infestation to 15- or 20-day-old plants did not cause yield reductions, thus suggesting that scouting for this pest should be concentrated on 25- to 40-day-old plants. = El umbral de acción para Tibraca limbativentris Stat (TL) en arroz tue calculado en 8.8 y 25.8 TL por 10 pases de red entomotôgica para plantas de 30 y 40 dias, respectivamente. Estudios de Ia densidad poblacional de TL en dos localidades del Valle del Cauca, Colombia, indican densidades de 1.2 TL por pase de red entomotogica (12 TL por 10 pases de red). Densidades equivalentes al umbra[ calculado no se observaron en los arrozales del Valle del Cauca, Colombia, durante los años de estudio. Infestaciones a plantas de 15 y 20 dias de germinadas no se reftejan en daño o rendimiento, to que sugiere que las evaluaciones para densidad insectit deben ser en plantas de 25 a 40 dias de germinadas.
| Main Authors: | , , , , |
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| Format: | Journal Article biblioteca |
| Language: | English |
| Published: |
2007
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| Subjects: | oryza sativa, rice, tibraca limbativentris, plant damage, yields, arroz, daño vegetal, rendimiento, |
| Online Access: | https://hdl.handle.net/10568/42714 http://naldc.nal.usda.gov/naldc/download.xhtml?id=21021&content=PDF |
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