Efecto de cuatro insecticidas y de Beauveria bassiana sobre Prorops nasuta (Hymenoptera: Bethylidae), parasitoide de la broca del café
The integrated coffee berry borer management includes the use of both biological and chemical components when required. This IPM approach requires that the different control systems used must be compatible. This study evaluated under field conditions the effect of chlorpiriphos, endosulfan, fenitrothion, pirimiphos-methyl and Beauveria bassiana on adults of the parasitoid, Prorops nasuta to determine the time lapse to use these methods of control without causing incompatibility. Two experiments wereconducted in two coffee plots of colombian coffee variety. The first consisted of spraying the insecticides and then the release of P. nasuta after 1, 7, 14, 22 and 29 days. In the second experiment, P. nasuta was released first and then the insecticideswere sprayed at 1, 7, 15, 21 and 29 days. A complete randomized design with factorial array: 5 (insecticides) x 5 (release/spray time) x 4 (replications) was implemented. The experimental unit was one branch/tree with 40 berries, which were kept with theaid of a sleeve nylon entomological cage and was infested with adults of coffee berry borer. Thirty-three days after infestation the spray of insecticides or release of parasitoids were made. Results showed that all the insecticides caused mortality to P. nasuta and that mortality decreased as time between control methods was greater. Results showed that when insecticides are sprayed first, the minimum time elapsed to release parasitoids should be 22 days; but when the parasitoids are released first it is advisable to wait 9 days before spraying B. bassiana and 20 days to spray the insecticides. Endosulfan was showed not to be selective against P. nasuta.
| Main Authors: | , , , |
|---|---|
| Format: | biblioteca |
| Published: |
2000
|
| Subjects: | COFFEA, BEAUVERIA BASSIANA, BETHYLIDAE, HYPOTHENEMUS HAMPEI, CONTROL BIOLOGICO, CONTROL QUIMICO, CLORPIRIFOS, ENDOSULFAN, FENITOTRION, INSECTICIDAS, CONTROL INTEGRADO, PLAGAS DE PLANTAS, INSECTOS DAÑINOS, PARASITOIDES, PIRIMIFOS METIL, COLOMBIA, |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|