Resumo O controle biológico utilizado para o controle de Tetranychus urticae (Koch) é o acaro predador Phytoseiulus persimilis (Athias-Henriot). É importante conhecer os efeitos dos acaricidas sobre o comportamento biológico do predador. Foi avaliado o efeito tóxico de a Abamectina na resposta funcional de P. persimilis. A resposta funcional do predador foi tipo II exposta a concentrações subletais de Abacmetina, os parâmetros da resposta funcional: taxa de ataque (a'), tempo de manipulação (Th), a eficiência na procura e predação teórica máxima (T/Th) foram afetados pelo acaricida. O predador passa mais tempo na procura, dominar, consumir e se preparar para a próxima procura em comparação com a testemunha e sua capacidade de predação foi afetada.

Abstract The biological control used for the control of Tetranychus urticae (Koch) is the predator mite Phytoseiulus persimilis (Athias-Henriot). It is important to the know the effects of acaricides on the biological behavior the Abamectin on the functional response of P. persimilis. The functional response of the predator was of type II exposed to concentration of Abamectin, the functional response parameters: successful attack rate (a’), handling time (Th), search efficiency and the maximum predation theory (T/Th) were affected by the acaricide. The predator spends more time in persecute, dominate, consume and prepair it self to the next searching comparing with the proof subject an the predation ability was affected.

Abstract Two formulations based on endophytic microbial consortia of genus Bacillus, were evaluated for the control of Rhizoctonia solani and Fusarium oxysporum. The bioproducts were applied three times on bean plants from Pinto Saltillo cultivar; the first application was made at sowing time, the second when more than 70 % of the plants had reached around 15 cm long and the third, 15 days after the second. The distribution of the experiment was in a randomized block design under greenhouse conditions. 60 days after sowing, the incidence and severity of the disease was evaluated to determine the biocontrol effect, as well as the length and diameter of the stem and the relative chlorophyll content to determine the effect of the bacteria on the plant growth promotion. The results showed that the formulations partially reduced the severity of the disease, it was also found that they were able to significantly promote growth of bean plants. The results present an alternative that can be used in integrated management of R. solani and F. oxysporum.

Resumen Dos formulados a base de consorcios microbianos endófitos del genero Bacillus, fueron evaluados para el control de Rhizoctonia solani y Fusarium oxysporum. Los bioproductos fueron aplicados en tres ocasiones sobre plantas de frijol de la variedad Pinto Saltillo; la primera aplicación se realizó al momento de la siembra, la segunda cuando más del 70 % de las plantas alcanzaron alrededor de 15 cm de longitud y la tercera, 15 días posteriores a la segunda. La distribución del experimento fue en un diseño de bloques al azar bajo condiciones de invernadero. 60 días posteriores a la siembra se evaluó la incidencia y la severidad de la enfermedad para conocer el efecto de biocontrol, así como la longitud y diámetro de tallo y el contenido relativo de clorofila para determinar el efecto de las bacterias en la promoción del crecimiento vegetal. Los resultados demostraron que los formulados redujeron parcialmente la severidad de la enfermedad, también se encontró que fueron capaces de promover significativamente el crecimiento de las plantas de frijol. Los resultados presentan una alternativa que puede ser usada en el manejo integrado de R. solani y de F. oxysporum.