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The potential of Chrysoperla rufilabris and Doru taeniatum as agents for dispersal of Spodoptera frugiperda nucleopolyhedrovirus in maize
Author(s) -
Castillejos Vasty,
García Luis,
Cisneros Juan,
Goulson Dave,
Cave Ronald D.,
Caballero Primitivo,
Williams Trevor
Publication year - 2001
Publication title -
entomologia experimentalis et applicata
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.765
H-Index - 83
eISSN - 1570-7458
pISSN - 0013-8703
DOI - 10.1046/j.1570-7458.2001.00792.x
Subject(s) - biology , predation , spodoptera , larva , chrysopidae , pest analysis , predator , lepidoptera genitalia , biological dispersal , crop , virus , biological pest control , veterinary medicine , zoology , botany , ecology , virology , population , biochemistry , medicine , demography , sociology , gene , recombinant dna
The behaviour of two abundant predators in Mesoamerican maize crops, Chrysoperla rufilabris larvae and Doru taeniatum adults, towards healthy and nucleopolyhedrovirus‐infected Spodoptera frugiperda larvae was compared. C. rufilabris did 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. taeniatum directed 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. taeniatum faeces up to 3 d after feeding on infected S. frugiperda larvae, whereas virus was inactivated in the gut of C. rufilabris . Both predators were shown to have acidic guts. A field experiment demonstrated that D. taeniatum that had fed on infected prey could contaminate foliage resulting in the transmission of the disease at a low prevalence (4.7%) to S. frugiperda larvae in a field maize crop.