Fruit Investigation, 1906. 
11 
/ 
Prompt removal of the trees affected seems at present to be 
the only treatment that can be suggested. Reports indicate that 
the disease has only been in the orchards two or three years at the 
most. Soil conditions seem to have no relation to the disease, as it 
is found on all kinds of soils. 
CROWN GALL. 
Only a few cases of crown gall have come to my observation 
in Mesa county, a few trees having been killed by it. A disease 
which appears very much the same and no doubt the same disease 
that is called crown gall by other stations, seems to be doing con¬ 
siderable injury to the Vinifera vineyards of this section. Rose 
of Peru seems to suffer most severely. Muscat, Tokay and Corn- 
ichon have been found affected, however. When the disease at¬ 
tacks the crown of the plant, death seems to follow in one or two 
years. When the canes are affected, growth seldom starts from 
above the gall, but new growth starts from below and the plant 
keeps alive, but bears very poor crops. While it is probably 
transmitted from plant to plant in the vineyard, this is uncertain, 
but observations in the vineyards seem to bear out the statement. 
I think it would be well to remove diseased vines and give 
closer inspection to nursery stock. Under the present system, 
grapes are passed without inspection. 
PHYSIOLOGICAL TROUBLES. 
Many yellow pear trees are found in the valley. Observations 
seem to indicate poor soil conditions, probably due in most cases to 
excessive watering. The foliage takes on a yellow cast, and in the 
last stages the leaves become thickly sprinkled with small deadened 
spots and fall from the tree. The trees grow more enfeebled from 
year to year and are finally pulled out. 
SMALL PEACHES. 
Many growers claimed that their peaches did not attain the 
customary size while they were very sure that they had thinned as 
carefully as in previous years. There is no doubt some truth in 
the assertion and also a cause. The peach trees were severely 
frozen in most localities during the winter of 1904-05. Not only 
were the peach buds killed, but the wood was damaged to quite a 
serious extent. Many of these trees were not pruned as heavily 
as they should have been following such a freeze, and did not make 
