Insect diseases

Insect diseases (12 results)

  • Bt

    Bacillus thuringiensis

    Region
    South
    This naturally occurring soil bacterium produces spores that contain a toxin. Several strains can infect and kill insects, however larvae must eat Bt for it to be effective. A strain may be specific to an insect group eg. moths. Because of this property, Bt has been developed for insect control....
  • Bt

    Bacillus thuringiensis

    Region
    North
    This naturally occurring bacteria produces spores that contain a toxin. It is also produced commercially. Larvae must eat Bt for it to be effective. Unlike NPV, Bt does not spread in the larval population. There are a number of different varieties of Bt. A variety may be specific to an...
  • Bt

    Bacillus thuringiensis

    Region
    West
    This naturally occurring bacterium produces spores that contain a toxin. It is also produced commercially. Larvae must eat Bt for it to be effective. Unlike NPV (p. 122) Bt does not spread in the larval population. There are a number of different varieties of Bt. A variety may be specific...
  • Aphid Diseases

    Pandora neoaphidis and Conidiobolus obscurus

    Region
    South, National, North, West
    Aphids are very susceptible to fungal diseases when it is humid. The disease forms a dense, fawn layer over the aphid. Fungal spores are discharged to continue the infection....
  • Aphid Diseases

    Pandora neoaphidis and Conidiobolus obscurus

    Region
    West, National, North, South
    The disease forms a dense, fawn layer over the aphid. Fungal spores are discharged to continue the infection....
  • Caterpillar Fungal Diseases

    Nomuraea rileyi, Beauveria bassiana, Zoophthora radicans and Entomophthora spp.

    Region
    South
    Fungal spores are spread by wind and infect larvae through the skin. This is unlike BT and NPV that have to be eaten. Fungus fills the inside of the insect and under moist conditions will often produce a velvety layer of spores on the skin, which may be light green...