. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 1907 ENTOMOLOGICAL SOCIETY. 53 is easy to understanH why the scale so quickly destroys infested trees. It is usually found that if no steps are taken to check the pest, it will kill young thrifty frees in three years. Almost any kind of fruit trees and bush fruits are liable to be attacked by the scale. Many shade and forest trees are also attacked. Remedies. (1) There is one great standard remedy that has given good satisfaction whenever carefully made and thorougWy applied, namely, the lime-sulph
. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 1907 ENTOMOLOGICAL SOCIETY. 53 is easy to understanH why the scale so quickly destroys infested trees. It is usually found that if no steps are taken to check the pest, it will kill young thrifty frees in three years. Almost any kind of fruit trees and bush fruits are liable to be attacked by the scale. Many shade and forest trees are also attacked. Remedies. (1) There is one great standard remedy that has given good satisfaction whenever carefully made and thorougWy applied, namely, the lime-sulphur wash. This should be put on in the spring, or in badly infested orchards it will pay to give the frees a double dose, one in autumn as soon as the leaves fall and the other in the spring before the buds have burst. (2) Kerosene emulsion, whale oil soap, and a number of other ready- made oil washes, like Scalesclde, give fairly good results. They have not, however, been found to be so reliable as the lime-sulphur wash, and in addi- tion are much more expensive. Before any tree is sprayed it should be carefully pruned and the branches thus removed should be -i*5'^- Fig. 10. San Jose Scale (Aspidiotus perniciosus). (a) Four young scales and two male scales, showing the nipple and ring even in the very young forms; (&) four immature female scales, and two nearly grown male scales, showing the prominent nipple and circular groove about the nipple, of the black scales; (c) two small female gray scales, showing the central nipple and circular groove. One scale has a nipple not central. The body of insect is beneath the scale. Parasites. 9 (1) Two small Chalcid flies, Aphelinus mytilaspidis (Le Baron), and Aphelinus fuscipennis, (How.) (2) Two ladybird beetles, Pentilia misella, (Lee), fig. 15, and Chilo' corns bivulnerus, (Muls.) (3) In some districts a fungus ,Sphcerostilba It is difficult to say whether the latter is at work in Please note that
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