. Better fruit. Fruit-culture. PLANT LICE Green Apple Aphis: 1, Young stem mother; 2, Adult stem mother; 3, Adult apterous viviparous female, second generation; 4, Young female, sec- ond generation; 5, Winged viviparous female of third generation; 6, Pupa of preceding; 7 and 8, Apterous male and female. Woolly Apple Aphis: 9, Apterous viviparous female; 10, Fall migrant; 11, Overwinter young. Black Peach Aphis: 12, Adult apterous viviparous female; 13, Young female, first instar; 14, Alate female; 15, Chrysopa sp. and eggs; 16, Cocoon of preceding. ground sulphur is effective against the milde
. Better fruit. Fruit-culture. PLANT LICE Green Apple Aphis: 1, Young stem mother; 2, Adult stem mother; 3, Adult apterous viviparous female, second generation; 4, Young female, sec- ond generation; 5, Winged viviparous female of third generation; 6, Pupa of preceding; 7 and 8, Apterous male and female. Woolly Apple Aphis: 9, Apterous viviparous female; 10, Fall migrant; 11, Overwinter young. Black Peach Aphis: 12, Adult apterous viviparous female; 13, Young female, first instar; 14, Alate female; 15, Chrysopa sp. and eggs; 16, Cocoon of preceding. ground sulphur is effective against the mildews of other plants and in other localities, the finest grades obtainable are of practically no use here. In the work previously done by Mr. Volck it was found that when lime-sulphur solution is added to a solution of copperas, or iron sulphate, a flocculent, black, muddy mass precipitates, which is ef?ective in con- trolling mildew. This discovery has been followed out by an extensive series of experiments during the past two seasons, and it appears that the virtue of that material lies principally in the large amount of precipitated sulphur which it contains in addition to the black iron sulphide. This sulphur is of the same nature as the finely ground article used for grape mildew, but is far finer than anything that can be produced by grind- ing. In addition, a number of other sprays have been prepared containing sulphur in an extremely finely divided form, and all have possessed the virtue of mildew control, and also have the very desirable property of stimulating the growth of the tree. To somewhat counteract these good qualities we have two bad features that accompany sulphur sprays. First (and again probably due largely to the sensi- tiveness of the trees in this valley), if the spray is too heavily applied it is apt to cause a dropping of the fruit and, to some extent, the foliage. Second, the fruit having a deposit of spray material on its exposed side is more suscepti
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