1011 . 
193 
Is the San Jose Scale Going ? 
Q. S. P., Stratford, Conn .—Have any of 
the wise men discovered the reason for the 
disappearance of the San Josfc scale? M.v 
trees that were badly covered with it are 
entirely free from it without spraying. 
Axs.—So far as I know the San Jose 
scale has not wholly disappeared from 
anv particular section, though there are 
indications that it is diminishing con¬ 
siderably in its virulence or power to 
spread and to injure trees. A great 
many persons think it has disappeared 
entirely simply because the trees are not 
wholly covered with it, but if an expert 
looks around on the trees, he will find 
some scale still present. I have seen 
in a number of localities, however, old 
apple trees which were infested five or 
six years ago, and which I thought 
would be dead by this time. Many of 
the branches were killed, but at present 
the trees seem to be taking on a new 
lease of life, and are making a good 
growth. On examining them, I find 
that almost all the scale Is dead, and 
• while there is some of it still alive, it 
is not increasing in the way we ex¬ 
pected that it might a few years ago. 
I cannot ascribe this to any particular 
parasite, though it may be the result of 
a combination of natural enemies or 
possibly the climatic conditions. This 
will be welcome news to a great many 
persons, but it should not be used as 
an excuse for not taking care of the 
trees, and I believe that our commercial 
orchardists will go right on spraying 
just the same, because the scale is not 
the only trouble that attacks apple trees, 
and so much benefit is derived, espe¬ 
cially from the use of the lime and sul¬ 
phur mixture, in controlling the pear 
psylh, leaf blister-mite, and peach leaf- 
curl, that many will use it anyway, scale 
or no scale. w. e. britton. 
Conn. State Entomologist. 
Growing Potatoes Under Mulch. 
I read with interest a short answer to 
a question on mulching potatoes on 
page 98, and I will give my experience 
last season with mulching with old hay. 
The potatoes were planted in the usual 
way, in rows 36 inches apart. They 
were harrowed twice before they were 
up, to keep the weeds in check. After 
they were up about two inches we put 
on the old hay about five inches deep 
on a small plot as an experiment. The 
vines were soon up through the hay, 
looking strong,and vigorous. Of course 
no weeds made their appearance and no 
cultivating was necessary all Summer, 
which is quite an item in favor of mulch¬ 
ing, but when we came to dig them we 
found it quite a job to clean the mulch 
off so the digger would work. The 
yield was very little better than those 
that were not thus treated, but the 
tubers were much larger; many of them 
weighed a pound and a half, and one 
we found weighed three pounds. I think 
the size of the tubers was largely due 
to the fact that they continued to grow 
long after the others were dead, and j 
until the frost killed them late in the 
Fall. We shall save these potatoes for 
seed, and mulch some more next season 
for the same purpose. The Nebraska 
Experiment Station has shown by con¬ 
tinued use that they have increased the 
yield 45 bushels per acre by use of 
mulched potatoes for seed. I would by 
all means plow the ground, and indeed 
we find that in a stiff clay soil it pays 
to disk the sod thoroughly before plow¬ 
ing, so as to make the soil as loose as 
possible. c. c. m'curdy. 
Crawford Co., Pa. 
Bone Meal on Berries. 
Is fiup ground bone meal a sufficient fer¬ 
tilizer for fair soil on strawberries and 
raspberries? I. m. k. 
Virginia. 
No. The ground bone contains, nitrogen 
and phosphoric acid, but no potash, and 
this is very necessary in fruit culture. A 
mixture of three parts fine bone and one 
part sulphate of potash is a good mixture 
for fruit. In case the fruit does not make 
enough growth on this mixture, nitrate of 
soda can be added. 
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