Image from page 111 of "Insects and insecticides : A practical manual concerning noxious insects and the methods of preventing their injuries" (1904)
Publisher: New York : Orange Judd Company
Contributing Library: NCSU Libraries
Digitizing Sponsor: NCSU Libraries
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0 FIG. 49. SAX JOSE SCALE.c, adult female containing young—greatly enlarged; d, anal fringe of same—still more enlarged. first brought to the Eastern States. It is also likely tobe carried upon fruit sent to market. In a given local-ity the insects are most likely to be carried from tree totree and orchard to orchard by the young lice crawlingupon insects and birds and then crawling off after theyhave lit upon other trees. They may also be blownabout by the wind. 100 INSECTS AKD INSECTICIDES The young lice are easily destroyed by spraying withkerosene emulsion. But in cases where the insect isfirst introduced to a new locality, the infested treesshould be burned to check the outbreak. Concerning this, Mr. L. 0. Howard, entomologist tothe United States Department of Agriculture, says: Theprincipal mode of spread is by commerce in nursery stock,cuttings and fruit. The time will come in the immedi-
Text Appearing After Image:
FIG. 50. SAN JOSE SCALE. Male adult—greatly enlarged. ate future^when some kind of quarantine regulations willhave to be established by States or by large fruit-growingdistricts. Should this species already have obtained thefirm foothold in the East which we suspect, Xew York,Michigan and other States in which the pomologicalinterests are great, should immediately, by act of legis-lature, establish quarantine regulations similar to thosein force at the present time in the State of California.In the meantime no orchardist should admit a single THE PEAB TKEE SLUG 101 young fruit tree, or a single cutting, or a single bud,from a distance into his orchard, without first carefullyexamining it and satisfying himself absolutely that itdoes not carry a single specimen of the San Jose scale.If this plan is adopted by every one interested, and with-out exception, the rate of spread of the species can belimited to the natural spread by crawling, by winds, andby the aid of other insects and bir
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