Read before the Association on 9 December 1938.
OBSERVATIONS ON APPLE CANKER
II. EXPERIMENTS ON THE INCIDENCE AND CONTROL OF SHOOT INFECTIONS1
Article first published online: 28 JUN 2008
Annals of Applied Biology
Volume 26, Issue 3, pages 458–469, August 1939
How to Cite
MARSH, R. W. (1939), OBSERVATIONS ON APPLE CANKER. Annals of Applied Biology, 26: 458–469. doi: 10.1111/j.1744-7348.1939.tb06983.x
- Issue published online: 28 JUN 2008
- Article first published online: 28 JUN 2008
- Received 1 February 1939
- 1Inoculations with N. galligena on unwounded shoots of apple show that canker infections through leaf scars may be initiated in October and April but not in November and January. Shoots sprayed before inoculation with a Bordeaux-casein-oil mixture gave a much lower proportion of infection than those unsprayed.
- 2Inoculations with N. galligena on pruning cuts showed that freshly made pruning cuts on apple shoots are susceptible to canker infection throughout the dormant season. Pruning cuts made during autumn and winter acquire a natural immunity to infection within 2 months.
- 3Several wound sealing materials applied to pruning cuts failed to give protection from canker when the treated surfaces were inoculated with N. galligena. The most promising wound protectant tested was a mixture of monohydrated copper sulphate, hydrated lime and linseed oil.