plant diseases

• how can plant diseases be detected?

  stunted growth

  • spots on leaves

  • areas of decay (rot)

  • growths

  • malformed stems or leaves

  • discolouration
• plant diseases can be identified by ?

  using monoclonal antibodies testing kit

  referring to the manual or internet
• what plant disease is causes by a fungal disease?

  rose black spot
• what plant disease is caused by a viral disease?

  tobacco mosaic virus
• what plant disease is caused by insects?

  ashpids
• what is stunted growth caused by?

  nitrate deficiency
• what is chlorosis caused by? ( lack of green pigment)

  magnesium deficiency
• what are magnesium ions needed for ?

  to make chlorophyll.
• what are nitrate ions needed for?

  protein synthesis
• what are the physical defenses on plants to block microorganisms from entering?

  • Cellulose cell walls.

  • Tough waxy cuticle on leaves.

  • Layers of dead cells around stems (bark on trees) which fall off.
• what are the chemical barriers on plants?

  • Antibacterial chemicals.

  • Poisons to deter herbivores
• what are the mechanical barriers on plants?

  • Thorns and hairs deter animals.

  • Leaves which droop or curl when touched.

  • Mimicry to trick animals.