RESUMEN
The present work aimed to study the biology of Agistemus brasiliensis Matioli, Ueckermann & Oliveira at the following temperatures, namely 15, 20, 25, 30 and 35 degrees C, fed with Brevipalpus phoenicis (Geijskes) and Typha pollen, in laboratory conditions. Life tables were calculated to evaluate the biological parameters. The optimal development of A. brasiliensis took place at 29 degrees C. The values of T (time of generation - days), R0 and r m at 30 degrees C were, 13.95, 16.25 and 0.20, respectively. The prey consumption of A. brasiliensis was studied at the densities of 5, 10, 20, 40 and 60 leprosis mite females per cage (3 cm in diameter) on citrus fruits at 29 degrees C. The maximum prey, namely 7.6 B. phoenicis females per day, were consumed at a density of 20 leprosis mites. At densities of above 40 leprosis mites per cage, A. brasiliensis oviposits 4.7 eggs per day, in comparison to 2.5 eggs per day at 20 mites per cage.
Asunto(s)
Ácaros y Garrapatas/fisiología , Citrus/parasitología , Control Biológico de Vectores/métodos , Conducta Predatoria , Animales , Femenino , Fertilidad , Larva/fisiología , Ácaros/fisiología , Densidad de Población , TemperaturaRESUMEN
O presente trabalho objetivou estudar a biologia de Agistemus brasiliensis Matioli, Ueckermann & Oliveira nas temperaturas de 15; 20; 25; 30 e 35°C, alimentada com Brevipalpus phoenicis (Geijskes) e pólen de Thypha sp. em condições de laboratório. Tabelas de vida de fertilidade foram calculadas para determinar os parâmetros biológicos. A temperatura ideal para o desenvolvimento de A. brasiliensis foi 29°C. Os valores de T (ciclo de vida - dias), R0 e r m, na temperatura de 30°C, foram de 13,95; 16,25 e 0,20, respectivamente. A potencialidade de predação de A. brasiliensis foi estudada para as densidades populacionais de 5; 10; 20; 40 e 60 adultos de B. phoenicis a 29°C, em arenas de 3 cm de diâmetro, sobre frutos de laranja-pêra. A densidade de 20 ácaros foi suficiente para que o predador consumisse seu número máximo de presas (7,6 ácaros por dia). Densidades acima de 40 ácaros da leprose proporcionaram 4,7 ovos por dia, em comparação aos 2,5 ovos por dia obtidos na densidade de 20 ácaros da leprose.
The present work aimed to study the biology of Agistemus brasiliensis Matioli, Ueckermann & Oliveira at the following temperatures, namely 15, 20, 25, 30 and 35°C, fed with Brevipalpus phoenicis (Geijskes) and Typha pollen, in laboratory conditions. Life tables were calculated to evaluate the biological parameters. The optimal development of A. brasiliensis took place at 29°C. The values of T (time of generation - days), R0 and r m at 30°C were, 13.95, 16.25 and 0.20, respectively. The prey consumption of A. brasiliensis was studied at the densities of 5, 10, 20, 40 and 60 leprosis mite females per cage (3 cm in diameter) on citrus fruits at 29°C. The maximum prey, namely 7.6 B. phoenicis females per day, were consumed at a density of 20 leprosis mites. At densities of above 40 leprosis mites per cage, A. brasiliensis oviposits 4.7 eggs per day, in comparison to 2.5 eggs per day at 20 mites per cage.