. Fruits, vegetables and flowers, a non-technical manual for their culture. concentrated ])roducts, but because of having l)etter facilities willjxrhaps average higher in concentration than the fruit grower, althoughanalysis of samples bought in the market have sometimes shown that theydid not test as high as good liome-nuide lime-suljilmr. These concentrated solutions are of a dee]) reddish-yellow color andfor use fiuist l>e greatly diluted with water. It is customary in spraying INSECTICIDES AND FUNGICIDES 255 for San Jose scale to use one part of the solution to eight or ten of waterand
. Fruits, vegetables and flowers, a non-technical manual for their culture. concentrated ])roducts, but because of having l)etter facilities willjxrhaps average higher in concentration than the fruit grower, althoughanalysis of samples bought in the market have sometimes shown that theydid not test as high as good liome-nuide lime-suljilmr. These concentrated solutions are of a dee]) reddish-yellow color andfor use fiuist l>e greatly diluted with water. It is customary in spraying INSECTICIDES AND FUNGICIDES 255 for San Jose scale to use one part of the solution to eight or ten of waterand to apply during open weather in February or March, while the trees arestill dormant. For summer use they must be diluted with from 30 to 50parts of water to avoid injury to the foliage, but lose much of their valueas insecticides when thus weakened. The concentrated solution is regardedas the most effective remedy for scale injury now in use. It should be added that there has somewhat recently appeared aso-called soluble sulphur which is recommended for the same uses as. A LiME-suLPHm Cooking Outfit.* lime-sulphur. It promises well, but has not been tested long enough andcarefully enough to justify veiy positive statements as to its merits. Tobacco Extracts.—For use against soft-bodied insects such as plantHce there is no more useful insecticide than extracts made from the midribsof tobacco leaves. These extracts contain as their effective ingredientnicotine and differ -^ddely in the percentage of nicotine they extracts or decoctions are made by placing a couple of poundsof the midribs in a wooden bucket full of boiling hot water, alloTN-ing it tostand over night. The percentage of nicotine under such treatment willprobably not be more than per cent, but it is a very useful wash forplants infested with aphides, does no harm at all to leaves, and where iFrom Farmers* Bulletin 650, U. S. Dept. of Agriculture. 256 SUCCESSFUL FARMING tobacco is grown and th
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