CHE REFERENCE LIBRARY - ZetaTalk

214 T?1E ,VliR,SERY-AIri NlJALTht W& mr~ltipli~~s with marvelous nr.pidit.y, there beingthree or four broods annually, allcl eac4i mother scale maygive birth to several hundredl .h, .,yNll1g. The young are bornalive and breeding continues untilIntc! allt.111~1 II. The snizlll halfgrownbIa& SC&~ are resista,ntto GYM wea,tIier a,nt I many ofthem hibt~rnatc safely.(‘orzfrol. --- San Jo& scale canbe coi~troIIed by spraying withlinle-sulfur solution 1 to 8 in theaut.umn or spring while the plantsare dormant. Uons or cuttingsreclei ved 1)) nursery-men froma’nother locality should be fumigatedwith hydrocyanic gas beforethey are used in order t.o preventFrc;. 225. St111 JO& sritlc. the introduction of the scale.T!lE PEAR SLW. - This insect (I:‘rioctl,~l~1)~)1’~~~~ lin~~ci~)attacks the foliage of pear, cherry, quince and plum. In theNorth the small oval eggs appear on the foliage as blistersabout the middle of 1Ia.y. About two weeks later the eggsha,tch and the dark green Iarvc713 appear on the upper side oftI1e Ie:rf. The larve are covered with a sticky slime and havethe appearance of small snails. The body is swollen in frontand tapers beI~ind like a tadpole (Fig. 2%). There may betwo or t.hree broods in the summer.The larxe feed on the upper surface of the leaves, eatingonly the epidermis and lea,ving the skeleton of veins and thelower epidermis to turn brown and wither. Badly injuredleaves fall and trees in the nursery may be entirely defoliatedby midsummer.