. Insects attacking fruit trees [microform]. Fruit; Insect pests; Insectes nuisibles; Fruits. 14 The Scale in its various stages attacks all kinds of orchard trees except i»our ciierrics, though Kieffer pears and some varieties of sweet cherries seem to be nearly immune. 1; also infests many shade trees and shrubs, such as mountain ash, haw- thorn, Japanese quince, currants niul roxs. The injury is caused by the tiny insects in almost countless numbers—often sufficient to cover completely the imrk—inserting their long, slender, bristle-like mouth parts through the surface of tiie bark, leaves
. Insects attacking fruit trees [microform]. Fruit; Insect pests; Insectes nuisibles; Fruits. 14 The Scale in its various stages attacks all kinds of orchard trees except i»our ciierrics, though Kieffer pears and some varieties of sweet cherries seem to be nearly immune. 1; also infests many shade trees and shrubs, such as mountain ash, haw- thorn, Japanese quince, currants niul roxs. The injury is caused by the tiny insects in almost countless numbers—often sufficient to cover completely the imrk—inserting their long, slender, bristle-like mouth parts through the surface of tiie bark, leaves and fruit and extracting the sap. At the same time they seem to insert a poison which in many cases slains with ! reddish color the inner bark and the part of the fruit around the insect itself. The result of these two kinds of injury is that not only is the fruit rendered unfit for sale, but the trees themselves are killed in from two to about six years, depending largely upon their size. Any snverely attacked orchard is doomed to destruction in a short time if left untreated. - ^r. 9^ — - . J Various stages of San Jose Scale, all enlarged about fifteen times: A. Adult female scale with Immature youn* of various stages settled down around or upon It; a, an adult male scale; 6, 6, 6, three small black scales, winter stage. B An artnlt female scale turned over, revealing the Insect herself beneath with brlstle-llke mouth parts exposed. C. a. an adult male scale; 6, 6, two Immature black winter stage scales, D. Young active larvae soon after birth. Note the nipples and little grooves around them in A 6, 6, 6, and in C 6. 6. (B redrawn from Alwood, the remainder original drawings by Miss A. Hearle.) Life History. The winter is passed on the bark of the twigs, branches and trunks in the immature blnck stage described above. About May «4th the males are full grown and begin to come out from under their scale covering, fly around and fertilize the females. T:i a month, or abo
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectpests, bookyear
