Experiment Station R Volume 2 (Paperback)

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. 1891 Excerpt: ...1 pound of Paris green to 500 gallons of the mixture." This was sprayed on apple and pear trees June 7 and 17, and July 1 and 31, the carbonate of copper solution having been applied alone April 24, and Paris green alone May 17 and 21. A diagram shows the arrangement of the treated and untreated trees. A table gives the results for the apple-trees, the pear trees being left out of account because they fruited very unequally. The foliage on all the trees was seriously injured. On the five treated appletrees there was an average of 43 per cent of wormy apples, and on the four untreated trees, 84 per cent. The fungicide does not seem to have produced any effect when thus used in combination with Paris green. Experiment No. 2--Bordeaux mixture and Paris green for apple scab and codling moth.--The formula used was "6 pounds of copper sulphate dissolved in 16 gallons of water, to which is added 4 pounds of fresh lime slacked in 6 gallons of water. To this mixture add Paris green in the proportion of 1 pound to 500 gallons. Three large appletrees were selected that had blossomed abundantly, and one half of each tree was carefully treated. Several applications were made, beginning May 2 ), at intervals of about 2 weeks." A table gives the results, which were inconclusive. Experiment No. 3--Amount of injury to foliage of apple-trees by Paris green--The ammoniacal carbonate of copper mixture, with 1 pouud of Paris green to 200, 300, 400, or 500 gallons of the mixture, was applied on four apple-trees, the copper solution without Paris green on one tree, and two trees were used as checks. The results are stated in a table. The injury from the codling moth was reduced by the Paris green from 70 per cent to 29 per cent, but no beneficial results were obtai...