Monday, November 4, 2013

Fungi's role in Pest control


Certain species may be used to eliminate or suppress the growth of harmful plant pathogens, such as insects, mites, weeds, nematodes and other fungi that cause diseases of important crop plants.

Entomopathogenic fungi can be used as biopesticides, as they actively kill insects. Examples that have been used as biological insecticides are Beauveria bassiana,  Metarhizium spp, Hirsutella spp, Paecilomyces (Isaria) spp, and Lecanicillium lecanii. 

  
Beauveria bassiana

Metarhizium spp
 
Hirsutella spp devours insect
   
Paecilomyces (Isaria) spp
 
 Lecanicillium lecanii.

    
Beauveria bassiana digesting carterpillars
 
Beauveria bassiana digesting insect



  
   
 
Metarhizium spp digests bug

 Endophytic fungi of grasses of the genus Neotyphodium, such as N. coenophialum, produce alkaloids that are toxic to a range of invertebrate and vertebrate herbivores.
  

These alkaloids protect grass plants from herbivory, but several endophyte alkaloids can poison grazing animals, such as cattle and sheep.Infecting cultivars of pasture or forage grasses with Neotyphodium endophytes is one approach being used in grass breeding programs; the fungal strains are selected for 
producing only alkaloids that increase resistance to herbivores such as insects, while being nontoxic to cattle

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