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Proceedings of the International Plant Propagator's Society

Vol. 13

Title:
DISEASES INITIATED IN THE PROPAGATING PHASE WHICH LATER CAUSE PLANT LOSS

Author:
K.W. Reisch

pp: 158-162

Abstract:
The incidence and spread of disease organisms in the propagating phase is probably far more critical and costly than most propagators realize. We know that disease or insect infected wood can readily be a source for infection and spread, but the contamination of previously "clean" stock is a problem with which all plantsmen should be concerned. Many growers on the West Coast have recognized the seriousness of some of these problems and have taken positive steps to correct them, through sanitation and disease control programs.

We are all familiar with fungus diseases such as those causing damping-off and we can readily diagnose the cause and take steps to prevent or correct it. If all diseases initiated in the propagating phase killed the plants at this time it would be fine, but the initiation of pathogens, which are evidenced later in the life of the plant, can prove to be very costly. The decline of plants in later phases of growth often results in death, or weakened plants of poor

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