This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 Excerpt: ...the water into the acid, as this procedure causes considerable heat and spattering of the acid. Next weigh out the cyanid and place it in a small paper sack and then gently drop it into the generator. The operator must close the box or leave the house at once. Where several generators are to be used, as in a large ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 Excerpt: ...the water into the acid, as this procedure causes considerable heat and spattering of the acid. Next weigh out the cyanid and place it in a small paper sack and then gently drop it into the generator. The operator must close the box or leave the house at once. Where several generators are to be used, as in a large fumigatorium, the sacks of cyanid should be lowered into the generating vessels by means of strings operated at the door. By taking this precaution the operator will avoid any possibility of inhaling the deadly gas. The material should be fumigated for a period of 45 minutes to 1 hour. In case of fumigating houses or large chambers, facilities for opening the doors and windows from the outside must be provided so as not to expose the operator to the fumes. No one should enter the fumigatorium until all the gas has been liberated by thorough ventilation. DIPPING NURSERY STOCK, BUDS, SCIONS, ETC. Some nurserymen and fruit growers dip nursery stock, scions, and bud sticks in order to insure as much as possible the destruction of any insects which may be present. The treatment is especially aimed at the San Jose and other scale insects and the woolly apple aphis on apple. The principal dips are: Lime-sulphur concentrate (33 Baume), 1 part to 7 parts of water (at temperatures of 60 to 120 F.); 20 per cent kerosene emulsion; or the miscible oils, 1 part diluted with 10 to 15 parts of water. The dipping method is not as effective as fumigation with hydrocyanic-acid gas (p. 43) and, further, may cause injury, depending upon the maturity and hardiness of the plants treated. The roots of nursery trees can not be dipped with safety in the lime-sulphur solution.1 Entire trees, however, may be immersed in the oil emulsions with less likelihood of injurious res...
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Add this copy of Information for Fruit Growers About Insecticides, to cart. $21.95, good condition, Sold by Books of Paradise rated 5.0 out of 5 stars, ships from Magalia, CA, UNITED STATES, published 1922 by U. S. Department Of Agriculture.
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Seller's Description:
Very Good- Light toning, 2 dime-sized moisture marks to front cover which bled to next page, tiny bit of chipping along edges, front cover has several tiny soil marks; b/w photos; 100 pages.
Add this copy of Information for Fruit Growers About Insecticides, to cart. $45.69, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2011 by Nabu Press.
