tively few chances against the larve destroying the grain, if not at 
once, in a few weeks or a few months. If the weather is too cold, 
they simply suspend operations until it gets warmer. Hence, the 
use of any ordinary degree of cold is only a palliative, and not a 
remedy, unless the temperature is permanently kept below 50° Fah. 
Concussion is also stated to destroy the eggs and the larva, and it 
is not improbable that elevating grain and allowing it to drop a 
considerable distance would destroy many eggs. 
But the wheat which has been the basis of my studies, was sent 
to the office direct from the threshing machine, and it has afforded 
ample proof that the concussion sustained by passing through the 
cylinder of a thresher, is not sufficient to offer any perceptible relief. 
Applications of both salt and freshly slacked lime have proven 
unsatisfactory in experiments which I have made, and the latter, 
besides doing little good, probably kills the young parasitic mites, 
and is also said to affect the market value of the grain. 
. Harris’ Insects Injurious to Vegetation, 2d edition, p. 500. 
- Loe. cit. 
. Recherches sur la Destruction ]’Alucite, ou Teigne des Graines. 
L’Entomologie Horticole, 1867, p. 5 1. 
. Enecyclopedie Methodique, Vol. 1, p. 115. 
Oo pm 6 be 
