Daño y control biológico de Oebalus insularis (Stal, 1872) (Hemiptera: Pentatomidae) en el cultivo del arroz (Oriza sativa L)

Rice consumption is considered the main food in the human diet. However, this grass is attacked by a number of pest insects. Worldwide, O. insularis is considered of secondary importance and is widely distributed in the countries of Latin America and the Caribbean. This pest insect feeds on the growing rice grain. Adults and nymphs suck the juice from the kernel during the filling and ripening stage. This causes empty, clear or sterile and stained grains. This paper aims to describe the damage and describe the main natural enemies reported for the O. insularis bug. This bug mainly attacks the rice grain, affects its development and causes a loss close to 50% of what is expected. The natural enemies that mostly attack O. insularis are parasitoids with 50% and predators with 25%. The parasitoids of the genus Trissolcus and Telenomus belonging to the family Platygastridae and Scelionidae respectively. The reported predators attacking rice bug adults belong to the hemiptera order of the Reduviidae family of the species Rocconota tuberculigera and Ricolla pallidinervis. It is concluded that despite the wide distribution of O. insularis it does not report a large number of natural enemies. Therefore, ecological life tables must be made to know the diversity of natural enemies of O. insularis in Ecuador.

Rice consumption is considered the main food in the human diet. However, this grass is attacked by a number of pest insects. Worldwide, O. insularis is considered of secondary importance and is widely distributed in the countries of Latin America and the Caribbean. This pest insect feeds on the growing rice grain. Adults and nymphs suck the juice from the kernel during the filling and ripening stage. This causes empty, clear or sterile and stained grains. This paper aims to describe the damage and describe the main natural enemies reported for the O. insularis bug. This bug mainly attacks the rice grain, affects its development and causes a loss close to 50% of what is expected. The natural enemies that mostly attack O. insularis are parasitoids with 50% and predators with 25%. The parasitoids of the genus Trissolcus and Telenomus belonging to the family Platygastridae and Scelionidae respectively. The reported predators attacking rice bug adults belong to the hemiptera order of the Reduviidae family of the species Rocconota tuberculigera and Ricolla pallidinervis. It is concluded that despite the wide distribution of O. insularis it does not report a large number of natural enemies. Therefore, ecological life tables must be made to know the diversity of natural enemies of O. insularis in Ecuador.

El consumo de arroz es considerado el alimento principal en la dieta humana. Sin embargo, esta gramínea es atacada por un sinnúmero de insectos plagas. A nivel mundial O. insularis es considerada de importancia secundaria y está ampliamente distribuido en los países de América Latina y el Caribe. Este insecto plaga, se alimenta del grano de arroz en formación. Adultos y ninfas succionan el jugo del grano durante el estado de llenado y maduración. Esto ocasiona granos vacíos, claros o estériles y manchados. Este trabajo tiene como objetivo describir los daños y refreír los principales enemigos naturales reportados para el chinche O. insularis. Este chinche ataca principalmente el grano del arroz, afecta su desarrollo y llega a causar una perdía próxima del 50% de los esperado. Los enemigos naturales que mayormente atacan a O. insularis son los parasitoides con 50% y los depredadores con el 25%. Los parasitoides del género Trissolcus y Telenomus pertenecientes a la familia Platygastridae y Scelionidae respectivamente. Los depredadores reportados atacando los adultos del chinche del arroz pertenecen a la orden hemíptera de la familia Reduviidae de las especies Rocconota tuberculigera y Ricolla pallidinervis. Se concluye que a pesar de la gran distribución de O. insularis no reporta un número amplio de enemigos naturales. Por lo tanto, se deben realizar tablas de vida ecológica para conocer la diversidad de enemigos naturales de O. insularis en el Ecuador