Calidad biológica de formulaciones de Beauveria bassiana usadas en el control de la broca del café

For commercialization of entomopathogenic fungal formulations, the control of biological, physical and chemical properties is necessary to assure the consumer a product of maximum field efficacy. This study summarizes the results of the analysis of quality variables such as spore concentration per gram, germination percentage (24 h), mortality percentage and average mortality time (days) of the coffee berry borer, of different Beauveria bassiana formulations evaluated between 1993-1998. Averages values were determined based upon the total number of samples of each product evaluated during the 6-year period. The highest spore concentration of B. bassiana was found in Conidia WG R (4.4X1010 e/g), followed by freeze-dried Brocarli R (4.3X1010 e/g). Thelatter also presented the highest germination (95¦5.4) followed by the Cenicafe strain (86¦5.6). A greater percentage of mortality was caused by freeze-dried Brocarli R (92¦10) in a time average of 4.5¦0.8 days, and the Cenicafe strain (81¦13) in 4.7¦0.8days. The Bb9205 isolation reactivated in berry borer, multiplied in rice was used as reference, presented the following averages: concentration of 1.9X1010 e/g, germination 90¦8.1