The Journal of the Department of Agriculture, Victoria . eveloped, is hemispherical in shape (see Fig. 70), colour brownishblack, is easily detected, and attacks the bark and foliage. Trees andplants badly attacked have a sooty appearance caused by the fungus knownas sooty mould {Capnodium Citricolum). This fungus lives upon thesugary secretion from the scale insects. Another indication of attack is theappearance of ants and flies upon the trees or plnnis attacked, in quest ofthis sugary secretion. It is the commonest scale found attacking the citrusfamily, is very partial to the pear and quin
The Journal of the Department of Agriculture, Victoria . eveloped, is hemispherical in shape (see Fig. 70), colour brownishblack, is easily detected, and attacks the bark and foliage. Trees andplants badly attacked have a sooty appearance caused by the fungus knownas sooty mould {Capnodium Citricolum). This fungus lives upon thesugary secretion from the scale insects. Another indication of attack is theappearance of ants and flies upon the trees or plnnis attacked, in quest ofthis sugary secretion. It is the commonest scale found attacking the citrusfamily, is very partial to the pear and quince, and is to be found attackingnumerous species of plant life both evergreeii and —If attacking deciduous trees, seed and stone fruits in thenursery row during their vegetative period, spray with kerosene emulsion,strength, i in 10 or 12. If attacking citrus trees or other hard-foliagedevergreens, spray with resin wash. The best time to spray the citrus is thewinter months, and after the spring growth has hardened, and before the. 348 Journal of Agriculture. Vicforia. [10 June, autumn growths start. Citrus and deciduous fruit trees standing in thenursery row during the winter months may be sprayed with red oil or crudepetroleum oil emulsion, but great care should be taken to see that theemulsion is properly made, otherwise injury will be done to the , red oil, i in 40 ; crude petroleum oil, i in 30. Greater Vine Scale (Lecaiiium Berbcridis)—This large brown-colouredscale insect does not confine its attack to the vine, but is to be foundseverely attacking many kinds of our fruiting trees, chiefly the apricot,cherry plum, Japanese plums, mulberry, and persimmon, also many ofour ornamental trees, shrubs, and creepers. Owing to its size is easy todetect, and attacks the bark of the branches and twigs. Spreads rapidly,but is the easiest of all the scale insects to destroy. Treatment.—Spraythe vines or fruit trees if attacked during the
Size: 1486px × 1681px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectagricul, bookyear1902
