The apple scab in Tennessee

This study of the development of the apple scab fungus, Venturia inaequalis(Cooke) Winter, was begun January first 1922. The ultimate aim of the work was to study the development of the fungus under Tennessee conditions in order to determine more accurately the best time to spray for the protection of the host against the fungus. Throughout this study special attention was given to the following points:

-The time at which the first ascospore discharge occurs.

The duration of the ascospore discharge.

Correlation of the weather conditions and the development of the fungus.

The advancement of the apple buds, leaves and fruits during the period of ascospore discharge.