Epidemiology of Beauveria bassiana in Controlled Populations of Bactericera cockerelli1
Por:
Suárez-Núñez J., Cortez-Madrigal H., García-Munguía A.M.
Publicada:
1 ene 2017
Resumen:
The effect of four variables-ratio of infected/healthy individuals, sex, interference from healthy males, and transmission time-was evaluated to know the potential of horizontal transmission of Beauveria bassiana (Balsamo) Vuillemin strain Bb-M to induce epizootics in controlled populations of tomato/potato psyllid, Bactericera cockerelli (Sulc). In addition, the time in which 50% of the conidia germinated (GT50) and response to humidity were evaluated. The Bb-M strain required high humidity to sporulate (= 93%) and had a GT50 of 12.7 hours. The proportion of infected/healthy insects was very correlated (r = 0.804, p = 0.05) with dissemination of the entomopathogen, suggesting a larger number of infected insects increased the spread of the entomopathogen. The sex effect was not consistent in transmission of the entomopathogen, with tendency toward greater infection (94%) when only males were infected. Transmission by males fluctuated from 15 to 96.66%, with greatest transmission having a ratio of 1:10 (infected males:healthy females). The mean transmission time (Tt50) was 5.8 days. The results showed the evaluated strain by the auto-dissemination technique has potential for use in management of tomato psyllid; however, future studies are needed to design and evaluate strategies for application in the field.
Filiaciones:
Suárez-Núñez J.:
Instituto Politécnico Nacional, Centro Interdisciplinario de Investigación para El Desarrollo Integral Regional, Unidad Michoacán, Justo Sierra #28, Col. Centro, Jiquilpan, Mich., 59510, Mexico
Cortez-Madrigal H.:
Instituto Politécnico Nacional, Centro Interdisciplinario de Investigación para El Desarrollo Integral Regional, Unidad Michoacán, Justo Sierra #28, Col. Centro, Jiquilpan, Mich., 59510, Mexico
García-Munguía A.M.:
Universidad Autónoma de Aguascalientes, Centro de Ciencias Agropecuarias, Av. Universidad #940, Ciudad Universitaria, Aguascalientes, Ags., 20131, Mexico
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