192 MAINE AGRICULTURAL EXPERIMENT STATION. I916. 



A few specimens of diseases twigs bearing spores were 

 received during March and April, 191 5, but no germination 

 tests were made. 



On March 31, 1916, a few affected twigs were received from 

 another town on the coast. These also carried an abundance 

 of spores which readily germinated in distilled water. Another 

 supply of material from the same source, obtained a week later, 

 likewise gave similar results. Under the climatic conditions 

 which exist in Maine this was about one month before the leaf 

 buds on the apple trees would begin to enlarge and growth to 

 start. Moreover up to within about three days before the 

 specimens were collected the ground was covered with over a 

 foot of snow. While it is of little practical importance whether 

 these spores, since they are found to be viable in the spring, 

 were produced the fall before or were formed in the spring or 

 late winter from living mycelium growing in the bark on the 

 limbs, it hardly seems possible that the latter should be the case 

 in the present instance. 



The first opportunity to extend these observations to scab 

 infections on pear limbs came in May, 191 6. Some specimens 

 were received which were collected just before the leaves started 

 in which the young twigs were bardly affected with scab and 

 carried an abundance of the conidia of the fungus. These 

 spores also readily germinated in distilled water. 



It may be of interest to state that while other varieties of 

 apples have been found affected and specimens have been 

 obtained from the interior of the State a great proportion of the 

 affected twigs came from Mcintosh trees, and from towns on 

 or near the coast. 



