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  • 1
    Electronic Resource
    Electronic Resource
    Comparison of wild type and genetically engineered nuclear polyhedrosis viruses of Autographa californica for mortality, virus replication and polyhedra production in Trichoplusia ni larvae (1996)
    Springer
    Entomologia experimentalis et applicata 81 (1996), S. 251-257 
    Details
    ISSN: 1570-7458
    Keywords: Trichoplusia ni ; recombinant nuclear polyhedrosis virus ; baculovirus ; virus replication ; polyhedra production
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Virus replication and polyhedra production of two polyhedron-positive recombinant nuclear polyhedrosis viruses of Autographa californica, AcJHE.KK and AcAaIT which encode juvenile hormone esterase and scorpion toxin, respectively, were compared with those of a plaque purified wild-type nuclear polyhedrosis virus, AcMNPV-C6, in Trichoplusia ni larvae. Though average times required to kill the T. ni larvae increased with the age of the larvae, killing time by either recombinant virus was significantly shorter than that by wild-type virus. Killing time was reduced ca. 30% for AcAaIT-infected larvae and 5 to 8% for AcJHE.KK-infected larvae as compared to that for AcMNPV-C6-infected larvae. The average weight of larvae infected with AcAaIT was significantly lower than that of larvae infected with AcJHE.KK and AcMNPV-C6. The mean numbers of polyhedra produced in each larva inoculated with AcAaIT and AcJHE.KK were ca. 20% and 60%, respectively, of those for AcMNPV-C6. Total virus titers in AcMNPV-C6-infected larvae were significantly higher than those in AcJHE.KK- and AcAaIT-infected larvae until 2 days post infection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00187033
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  • 2
    Electronic Resource
    Electronic Resource
    Influence of Induced Plant Defenses in Cotton and Tomato on the Efficacy of Baculoviruses on Noctuid Larvae (1998)
    Springer
    Journal of chemical ecology 24 (1998), S. 253-271 
    Details
    ISSN: 1573-1561
    Keywords: Induced resistance ; baculovirus ; Heliothis virescens ; Helicoverpa zea ; peroxidase ; polyphenol oxidase ; oxidative enzymes ; tritrophic interactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Constitutive phenolase activity of plants has a profound ability to modulate disease in insects caused by baculoviruses. We investigated the influence of damage-induced plant phenolic oxidases in cotton and tomato on mortality caused by two different baculoviruses in their respective hosts, Heliothis virescens (L.) and Helicoverpa zea (Boddie). For both plant species, peroxidase (POD) and phenolic levels were predictive of larval mortality caused by baculoviruses. The higher the POD activity, the lower the mortality in both hosts. Different classes of phenolics (e.g., monohydroxyphenolics vs. catecholic phenolics) in combination with POD activity had different effects on the severity of viral disease depending upon mixture, which implies that viral efficacy is predictable only if total chemical content of the plants is specified. Inhibition of baculoviral disease by plant phenolase activity has potential implications for the compatibility of baculoviruses with induced resistance in IPM programs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022528324344
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