| Autor: |
Castillejos, Vasty, García, Luis, Cisneros, Juan, Goulson, Dave, Cave, Ronald D., Caballero, Primitivo, Williams, Trevor |
| Zdroj: |
Entomologia Experimentalis et Applicata; March 2001, Vol. 98 Issue: 3 p353-359, 7p |
| Abstrakt: |
The behaviour of two abundant predators in Mesoamerican maize crops, Chrysoperla rufilabrislarvae and Doru taeniatumadults, towards healthy and nucleopolyhedrovirus‐infected Spodoptera frugiperdalarvae was compared. C. rufilabrisdid not discriminate between healthy and virus‐infected prey, although the mean search time was approximately two times longer towards virus‐infected larvae. In contrast, D. taeniatumdirected a greater proportion of their attacks towards virus‐infected prey but there was no significant difference in the search time. Prey consumption time did not differ significantly for each type of prey by either predator, although prey consumption was much faster in D. taeniatum. Viable virus was detected in D. taeniatumfaeces up to 3 d after feeding on infected S. frugiperdalarvae, whereas virus was inactivated in the gut of C. rufilabris. Both predators were shown to have acidic guts. A field experiment demonstrated that D. taeniatumthat had fed on infected prey could contaminate foliage resulting in the transmission of the disease at a low prevalence (4.7%) to S. frugiperdalarvae in a field maize crop. |
| Databáze: |
Supplemental Index |
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