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Show mmmim ELEAK.NE5 SAN JOSK SCALE IS MOST SERIOUS PEST In the minds of the fruit grower tin; San Jose scale U one of the most KerloiiN pests he has to den! with, and during Iho past three or four years It has been on the Increase to such an cvlenl that It threatens lo become a serious menace! lo Ihe fruit Industry, unless stringent iiieasures are used to combat 11. A conference for the study of the scale was held at Vlneennes, composed of A. J. Ackerinan, entomologist of lieiiton llle, Ark.; H. A. I'orler, enio-luologlHi enio-luologlHi stationed at Vlneennes; W. Ih Flint, entomologist from Illinois, and J. J. Davis, eiilouiolodst of Ihe I'ur-due I'ur-due experiment station. From the results of last experiments It was found that lime sulphur failed to kill a largo per cent of the scale. Something Some-thing more elTeellve has to be used. . 'The reeoiniuondat Ion made at thin conference was that oil sprays be used when the trees were In Hie dormant state. The sprays found effective were the mlsclble oils and boiled lubricating lu-bricating oil emulsion. Various mlsclble mls-clble oils are advertised In the horticultural horti-cultural publications. These must he used at the strength recommended by the manufacturers. The boiled lubricating oil emulsion Is made from tho formula as recommended recom-mended by the I'nlted States Department Depart-ment of Agriculture and Is as follows: Diamond pnrafin oil, 1 gallon; lbuld potash llsli oil soap, 1 pound; water 't Kail on. This constitutes the stock solution. A spray solution containing frorn 2 to S per cent of oil was recommended, j depending upon the seriousness of the Infection. A 2 per cent solution Is j mnde by nddlnir 1' gallons of the Block solution to a .Vl-gallon barrel of (spray, and n 3 per cent solution Is made by nddlng 2Vi gallons of the stock emulsion. Those Interested In the details of , making this stock emulsion should ! write ttie I'urdue experiment station, Lafayette, Ind. Those using only a small amount of (lie emulsion during the season, say throe or four barrels. will probably find It to their ndvan- tage to purchase the mnterlal rpady prepared, due to the fact that It ; takes some special equipment to make J It. It Is necessary to pump tills ma-: ma-: terlal with n force pump while it Is j very hot, vld''h Is execodiagly hard j t in the pump unless It Is equipped j wllh metal valves and special packing. pack-ing. Leather packing and valves burn 1 out In a very short time. Manufac- j ' turers who make tlte material In large j ; lots can buy Ihe raw material at a de-j de-j cided advantage. i Oil emulsion hi recommended onlv 1 ' ns an Insecticide, nn.! Is not a fungl-. fungl-. cide. It will not control peach leaf : J cur!, nd the usual fungicide has to ' be apyih J for curl. I.imo-sulphiir Is generally used for this and should be applied in advance of the oil spray, as I It will penetrate the crevices Letter than If applied after the oil. . Thin oil emulsion has several dls-i dls-i tlnct advantages oxer lime-sulphur. It ' has 1 n proven more effcCJve. It Is more pleasant to use. as It Joes not ! Injure the eyes or skin of the operator, opera-tor, if does not corrode the pump, but makes It work perfectly, the cost Is j : less than one-half that of lime-sulphur. The stock solution will last all season If not allowed to freeze. ! j Fruit growers generally are very en -i thuslastlc over Ibis new spray. Kx-i Kx-i periments the past season Indicate ; that this materia! can he used as s. j summer spray to kill aphis and hatch !ng scale. ' I I |