Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Plural form of
arsenical .
Etymologies
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Examples
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In most cases expediency demands that the arsenicals be used with the fungicides.
Apple Growing M. C. Burritt
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On stone fruits, such as cherry, peach, and plum, arsenicals are likely to cause injury to foliage and must be used with caution if at all.
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Pure arsenic was early used and soon led to the use of other arsenicals.
Apple Growing M. C. Burritt
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If the trees can be sprayed thoroughly, arsenicals and other insecticides used in spraying apple orchards will be found very effective while the worms are small.
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Tent caterpillars are readily destroyed by arsenicals sprayed on the foliage of trees infested by them.
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Both these arsenicals should be thoroughly wet up by stirring in a smaller receptacle before they are put into the spray tank, in order to get them in as complete suspension as possible.
Apple Growing M. C. Burritt
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The arsenicals used in the same proportion as for flea-beetles will destroy the potato beetle.
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The fruit worm feeds to a certain extent on the foliage before penetrating the fruit, and it is possible to keep it in subjection by spraying with arsenicals as advised for the flea-beetles.
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When the plants are sprayed with arsenicals for other insects this will operate to a certain extent against the stalk-borer.
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It is suggested that arsenate of lead, being more adhesive than other arsenicals, should be used for the first sprayings, beginning when the fruit commences to form, repeating once or twice as found necessary, and making a last spraying with Paris green within a few days of ripening.
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