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Sometimes badly infested plants are relieved of their swarms of 
aphides mysteriously. A cabbage plant that had been set out for 
seed at a distance from any others of its kind, was so harrassed with 
lice during the early part of the season that it made very little growth. 
On July 6, we noticed that this plant was entirely free from live 
aphides, though the stemand axils of the leaves were covered with their 
remains. On the plant at this time was a single lady bird beetle 
which was dead, and an unfamiliar live insect, which we were unable 
to identify. This plant continued free from the parasites at the time 
when those in the garden were most infested. 
The Potato Beetle (Daryphora 10 lineata Say). 
Early in the season, the Colorado potato beetles appeared in un- 
usally large numbers. We passed over the garden plantings almost 
daily, and gathered them by hand in thousands. Later when the 
first brood of larvae hatched, we were surprised to discover that the — 
number was very small. Indeed the larvae were not numerous at 
any time during the season. It would appear from these results 
that a thorough hand picking of the beetles is one way to avoid dam-~- 
age from this insect. 
Many are of the opinion that the beetles are not likely to be in- 
jured by the application of Paris green to the foliage. On June 16 
we applied a mixture of this poison mixed with land plaster, at the 
rate of one part to one hundred by weight, to a portion of a plat of 
potatoes. 
A careful examination made next day, showed that at least fifty 
per cent of the beetles were dead. 
It is well known that these insects feed wpon the foliage, and we 
know of no reasons for believing that they are not susceptible to the 
effects of Paris green when once they have eaten it. It is possible 
that, were a larger percentage of poison used, the beetles would avoid 
it, and so escape injury. | 
The Currant worm (Nematus ventricosus, Klug). 
The appearance of this insect was noted May 21. Onan old plan- 
tation of currants it came in large numbers, though on plants set 
last spring, we failed to find any during the season. On the plants 
set in the spring of 1884, and heavily mulched with coal ashes, a 
very few appeared. 
The Radish maggot (Larva of Anthomyia raphani, Harris). 
A solution of carbolic acid has been recommended as a preventive — 
of the attacks of this imsect. 
On May 2, we applied this solution at the rate of three grammes 
of the acid, to five gallons of water, to the soil about the roots of a 
row of radishes in the garden. On May 11, we renewed the applica- 
tion, doubling the amount of theacid. May 18, we repeated it, using 
eight grammes of the acid to five gallons of water, following with — 
the last named solution on May 23. No benefit resulted from these 
applications that we were able to detect. It is possible that the — 
plants would have borne a still stronger solution, which might have 
been efficacious. 
