. The San José and other scale insects [microform] : prepared for the use of fruit growers and scale inspectors. Scale-insects; Fruit; Coccidés; Fruit. til 20 1. acteristic, and is frequently sufficient to fix their identity. In slij^oafediate infestations these scales seldom have a tendency to cluster, but, insteaoi^ned. are scattered somewhat evenly on the bark. (Fig. 8). jonvinci In badly infested orchards the presence of the scale on new growtiajg win and the fruit produces a deep purplish-red coloration in the tissues ju â Mai beneath the epidermis. ht^ is cul During late summer (July a
. The San José and other scale insects [microform] : prepared for the use of fruit growers and scale inspectors. Scale-insects; Fruit; Coccidés; Fruit. til 20 1. acteristic, and is frequently sufficient to fix their identity. In slij^oafediate infestations these scales seldom have a tendency to cluster, but, insteaoi^ned. are scattered somewhat evenly on the bark. (Fig. 8). jonvinci In badly infested orchards the presence of the scale on new growtiajg win and the fruit produces a deep purplish-red coloration in the tissues ju â Mai beneath the epidermis. ht^ is cul During late summer (July and August) there is a very mark|g|e evid( increase in the number of male scales, while in fall the proportion of maoUe tree scales is much decreased. A good The absence of eggs or empty shells in some cases gives a clue to tlQdtawb kind of scale, since the Forbes and Putnam Scale insects deposit eggs, pickers The San Jos^ Scale leaves no conspicuous, ventral, whitish scale the bark after the removal of the insect, as does the Scurfy Bark-Lou^ When trees or shrubs become badly infested it is not an uncomnic thing for the bark to be covered so thickly that it is entirely obscure Sometimes the scales overlap one another so closely that they are thn or four layers in thickness. Occasionally, however, this layering occuii only at the bases of twigs and branches, in which cases the remedy to applied should be one which will soak through the different layor Crude petroleum has this property of penetration, and herein lies efficacy as a scale insecticide. nlature f When the bark becomes thickly covered it has a gray, ashy appeaitke folio ance, due to the presence of large numbers of mature scales. When tl .1 Ho^ tree is alive and the scales abundant, one can prove if the insects ai ||g the alive by crushing them with a knife or thumb-nail. If a yellow, oily sul il^ainst t stance exudes, they are alive, but if the scales are dead no oil will mat ||>untry. its appearance. | Son H
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