Identifier: journalofdepartm10vict (find matches)
Title: The Journal of the Department of Agriculture, Victoria
Year: 1902 (1900s)
Authors: Victoria. Dept. of Agriculture
Subjects: Agriculture Agriculture -- Australia Victoria
Publisher: (Melbourne): Dept. of Agriculture, Victoria
Contributing Library: The LuEsther T Mertz Library, the New York Botanical Garden
Digitizing Sponsor: The LuEsther T Mertz Library, the New York Botanical Garden

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ger and his son continued the fumigation at intervals during Apriland May. The Red Scale, on all trees treated, was destroyed ; but thecharge was insufficient to kill Olive Scale fumigated earlv in May. Tnall subsequent dem.onstrations, i ounce each of cvanide and sulphuric acidto 160 cubic feet was used, and was found to be effective against boththe Red and the Olive Scales, as well as the eggs of the latter. It isinadvisable, however, to use the stronger charge when treating orangetrees, unless they are treated on cloudy days, or at night, as they aremuch more susceptible to injury than lemons or mandarins. The value of fumigation was further demonstrated in July, 1909. Inthe latter end of June of that year, T discovered the San Jo.se Scale in aDoncaster orchard. As this dreaded pest had net previously been found in the district, andwas confined to one orchard, it was decided to have the infected trees-fumigated. aoTH June, 1912.) Fumigation for ihc Destruction of Scale Insects. 367
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368 Journal of Agriculture, Victoria. (ioth June, 1912. The work was carried out in July. One ounce each of cyanide andacid to 120 cubic feet was used, i.e., about a quarter strona;er than thatused on evergreen trees. The scale was completely stamped out. It isnow nearly three years since the trees were treated, and, although a carefulinspection of the orchard where the outbreak occurred has been frequentlymade, no trace of the scale could be found. Fumigation for Woolly Aphis was also tried in Mr. Fingers orchardin May, 1909. A charge of the same strength as that used for citrus treeswas given. On examining the trees a month later, live aphis were foundin the knots and excrescences, though examination immediately after treat-ment revealed no living aphis. These were, no doubt, protected in theinterstices of the bark from the action of the gas. Fumigation Outfit. Sheets, either octagonal or square, made of strong closely woven-unbleachtd calico, are recommended. The octagonal sheets r

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