Preventing & Treating Fireblight

On Apples, Pears, Asian Pears, Crabapples and more

Organic or Conventional!

Conventional

  • Mix 1 tsp to 2 tsp of Monterey Garden Phos or Agrifos per gallon of water.
  • Spray solution as flower buds begin to swell but never on open flowers.
  • Repeat every 1 to 2 months as long as wet conditions persist (until approx May).
  • During high disease pressure (rain or heavy dew) use the higher rate shorter application period.

Organic

  • Mix 1 tsp to 2 tsp of Monterey Complete Disease Control per gallon of water.
  • Spray solution as flower buds begin to swell but never on open flowers.
  • Repeat every 7 to 10 days as long as wet conditions persist (until approx May).
  • During high disease pressure (rain or heavy dew) use the higher rate shorter application period.

 

If Fireblight symptoms appear later in the spring, prune blackened stems off at least a couple inches below the darkness, ensuring that once the cut is made there is no darkness inside the remaining stem. If so, remove stem a few inches lower. Be sure to dispose of fireblight infected material into the trash. Do not leave laying on the ground or put in the green can.

IMPORTANT: When pruning off Fireblight or pruning fireblight prone plants be sure to sterilize your pruners in between EACH CUT. You may use a 1 part to 10 part bleach solution, a 1 part to 4 part vinegar solution or Lysol spray.