A
check lot in another can, moistened with water only, were healthy and
lived for some days afterward.
A number of cabbage maggots placed on the soil impregnated with the
solution died within twelve hours.
To test its actual killing power, used the solution, one ounce kainit
to one pint water, to spray a rose bush badly infested with plant
lice. Effect, all the lice dead ten hours later; the younger forms
were dropping within an hour.
Sprayed several heads of wheat with the solution, and within three
hours all the aphides infesting them were dead.
Some experiments on hairy caterpillars resulted unsatisfactorily, the
hair serving as a perfect protection against the spray, even from the
atomizer.
To test its effect on the foliage, sprayed some tender shoots of rose
and grape leaves, blossoms, and clusters of young fruit. No bad effect
observable 24 hours later. There was on some of the leaves a fine
glaze of salt crystals, and a decided salt taste was manifest on all.
Muriate of potash of the same strength was tested as follows: Sprayed
on some greenhouse camellias badly infested by mealy bugs, it killed
nearly all within three hours, and six hours later not a living insect
was found.
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