A5 
Diplosis pyrivora has been complained of as an injurious species for 
the first time. It has reached Newark, Montclair, Elizabeth, and Pat- 
erson, so far aS my information extends, and has probably been in some 
orchards for at least three years, Where it first made its start in this 
State I have been unable to ascertain. The Lawrence pear is the one 
most generally attacked, in one orchard over 90 per cent of the fruit 
being infested. From an examination of the infested fruit I believe the 
egg is laid in the ovary, or if not that, the young larva does not pierce the 
fruit, but follows the pistil into the ovary or seed chamber, the opening 
in this variety of pear being quite wide. In many eases also this same 
passage is used by the larva to leave the fruit where it remains sound 
and does not crack. This promises to be one of the most dangerous of 
the fruit pests. 
Spraying fruit trees with London purple has been very generally 
practiced in New Jersey and always with most gratifying results An 
unexpected result has been the destruction of the fungus on the pear 
which so generally disfigures varieties like the Bartlett. Fruit on 
sprayed trees is fine and clean, that on the others is spotted and 
clouded and of an inferior grade. 
The Plum curculio has made a plum crop almost impossible in New 
Jersey. I made only one experiment myself during the season, spray- 
ing one tree with the kerosene emulsion, 1 to 12, once a week for six 
weeks. Attheend of that period nearly every plum on the tree had from 
one to six larve, and I called the experiment a failure. Several grow- 
“ers who had a few trees only report a favorable result in spraying with 
the arsenites, and there seems little doubt but that a certain percent- 
age of fruit can be saved in this way. For small trees of choice varie- 
ties I suggested cutting out theegg. This was done in a few cases 
with absolute success. It leaves only a trifling scar, no more than that 
of the original puncture, and is certain in effect. Of course this would 
not answer on a commercial scale, but for choice fruit in the garden it 
is not impractical, and might be used to supplement spraying with 
arsenites. 
I have followed out my inquiries into the actions of certain fertil- 
izers as insecticides, and am more than ever convinced that in kainit 
we have a powerful agent for the destruction of forms infesting sod- 
land. Where this material is used before planting corn even on old 
sod, cutworms and wireworms will do no injury. In addition I 
always advise fall plowing to give the winter a chance. Direct exper- 
iments in the laboratory show that Elater larvze will die in soil that 
contains kainit, though it acts slowly and two weeks are required to 
produce a complete result. The experiments will be given in detail 
elsewhere. 
Mr. Alwood, in discussing, said that he had recommended London 
purple against Fuscicladium for some years. 
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