34 
pounds of the dust should be distributed from the crown outward to a 
distance of 2 feet, first removing the surface soil toa depth of from 
4to 6 inches. The tobacco kills the aphides by leaching through the 
soil, and acts as a bar for a year or so to reinfestation. The dust isa 
waste product of tobacco factories, costs about 1 cent per pound, and 
possesses the additional value of being worth fully its cost as a 
fertilizer. 
KEROSENE EMULSION AND RESIN WASH. 
Either the kerosene and soap emulsion or the resin wash, the former 
diluted 15 times and the latter at the strength of the winter mixture, 
are used to saturate the soil about the affected plants and either left 
to be carried down by the action of rains or washed down to greater 
depths by subsequent waterings. 
For the grape phylloxera or the root-louse of the peach or apple, 
make excavations 2 or 3 feet in diameter and 6 inches deep about the 
base of the plant and pour in 5 gallons of the wash. If nota rainy 
season, a few hours later wash down with 5 gallons of water and repeat 
with a like amount the day following. It is better, however, to make 
this treatment in the spring, when the more frequent rains will take 
the place of the waterings. 
For root-maggots enough of the wash is put along at the base of 
the plant to wet the soil to a depth of 1 to 2 inches, preferably followed 
after an hour with a like amount of water. 
For white grubs in strawberry beds or in lawns the surface should 
be wetted with kerosene emulsion to a depth of 2 or 3 inches, follow- 
ing with copious waterings to be repeated for two or three days. The 
larvee go to deeper and deeper levels and eventually die. 
POTASH FERTILIZERS. 
For white grubs, wireworms, cutworms, corn root-worms, and like 
insects, on the authority of Prof. J. B. Smith, either kainit or the 
muriate of potash, the former better, are broadcasted in fertilizing 
quantities, preferably before or during a rain, so that the material is 
dissolved and carried into the soil at once. These not only act to 
destroy the larve in the soil, but are deterrents, and truck lands con- 
stantly fertilized by these substances are noticeably free from attacks 
of insects. This, in a measure, results from the increased vigor and 
greater resistant power of the plant, which of itself more than com- 
pensates for the cost of the treatment. The value of these fertilizers 
against the wireworms is, however, questioned by Prof. J. H. Comstock. 
For the root-louse of peach and apple, work the fertilizer into the 
general surface of the soil about the trees, or put it in a trench about 
the tree 2 feet distant from the trunk. 

