. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. attr 3 to kill, and as they are easily trans- ported on nursery stock, buds or cions, and also multiply rap- idly, the scale Insects are .justly to be consid- ered as among the most dangerous and destruc- tive of injurious In- sects. A single female San Jos6 scale may rear a brood of from 100 to liOO joung and
. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. attr 3 to kill, and as they are easily trans- ported on nursery stock, buds or cions, and also multiply rap- idly, the scale Insects are .justly to be consid- ered as among the most dangerous and destruc- tive of injurious In- sects. A single female San Jos6 scale may rear a brood of from 100 to liOO joung and there may be four or five generations a year and more than 2 000 eggs have been laid by a single Lecanium scale The scale Insects, the dreaded San Josfi speeies in eluded, can be successfully controlled by ludicious m telligent and timely work with spra\ s of whale oil soap kerowater, crude petroleum, or Indiocvanic acid gas which should be used in the case of nurser-s stock Since 1889 fumigation with hjdioevanic acid gas has been extensively practiced in the citrous orchards of California, and now Florida and South African fruit growers are also using it in their orchards Large gas tight tents or boxes are placed over the trees and the gas then gennrafod within. Much nurseiy stock is now treated witli the in fi;.'ht boxes or houses this is required by l;ns' in .Mai and the province of Ontario and it should I,.- I in other regions. Recentlj greenhouses, railway ciai'lu-s, rooms in private houses, and whole flouring mills have been effectively fumigated with this gas. It is generated with water, a good grade of commercial sulfuric acid, and potassium cyanide 98 to 99 per cent pure. The acid is poured Into the water in an earthen jar or crock and the cyanide then dropped in. In fumigating trees, rooms or flouring mills, 1 ounce of the cyanide, 1% fluidounces of sulfuric acid, and 2M ounces of water are used for every 125 cubic feet of INULA space ; for nurse
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Keywords: ., bookauthor, bookcentury1900, bookdecade1900, booksubjectgardening
