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Pansy Sickness or Stem Rot



P_pansyskness

Pansy Sickness or Stem Rot

Usually appear in

All Year


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Caused By:-     The Fungus Phytium violae

Description

Pansy Sickness is also called Stem Rot and is caused by the soil-borne fungus Pythium violae. The symptoms are difficult to catch early as it starts at the base of the plant near the soil where the tissues becomes watersoaked and soggy. The plant then suddenly collapses or wilts as well as loosing its normal colour. If the plant is tugged lightly the stem will snap easily. The infected roots will be light brown in coluor and slightly darker than the normal root coloration.
Plants previously stressed by drought or applications of excessive levels of nitrogen fertiliser are more susceptible to infections by this fungus.
This disease is soil bourn and wet conditions for prolonged periods are conducive to its development.
Several species of the soilborne Pythium fungus are common and are the cause of many crown and root rot disease.
It is believed that improperly composted animal manure is often the cause of the introduction to the soil. Picture by R.J. Reynolds Tobacco Company Slide Set, R.J. Reynolds Tobacco Company, Bugwood.org.


Control

It is important to remove infected plants as soon as possible and drench the soil with fungicides such as Cheshunt compound or Jayes fluid which are used prior to planting. The Recipe for Cheshunt is 2 parts finely ground copper sulphate 11 parts fresh ammonium carbonate.
Mix thoroughly and stand for 2 hours in sealed container. Dissolve 1 ounce (28 g) in a little hot water and add this to 2 gallons of cold water and use immediately.
Avoid growing pansies for consecutive seasons in the same container compost or on the same patch of ground as this will lead to a build up of this disease in the soil.



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