. Report of observations of injurious insects and common farm pests, during the year ... : with methods of prevention and remedy . AR AND CHEKRY SAWFLY. 101 down, that not ten per cent, of the larvfe were ahve (so far as examined)in their cocoons ; and where a double quantity of nitrate was apphed,a still lesser proportion of the maggots were found to be alive. Muriate of potash in about the same quantities showed results ofrespectively nearly one-half or three-quarters of the maggots dead intheir cocoons. I am not aware of the action of lime having been tried, but theexperiments are given in
. Report of observations of injurious insects and common farm pests, during the year ... : with methods of prevention and remedy . AR AND CHEKRY SAWFLY. 101 down, that not ten per cent, of the larvfe were ahve (so far as examined)in their cocoons ; and where a double quantity of nitrate was apphed,a still lesser proportion of the maggots were found to be alive. Muriate of potash in about the same quantities showed results ofrespectively nearly one-half or three-quarters of the maggots dead intheir cocoons. I am not aware of the action of lime having been tried, but theexperiments are given in minute detail in the Bulletin referred toat p. 94. In our own (preceding) horticultural reports of experiments, it willbe noticed that various kinds of Pears are named as subject or notsubject to attack, which may prove to be serviceable information ; andI offer my best thanks to my contributors for their kind courtesy inallowing me to give my readers the benefit of their skilled practicalobservations. Pear and Cherry Sawfly. Sehmdria atra, Stephens and Westwood;Eriocavipa limacina, Cameron ; Eriocavipoides Umacina, Selandria ATRA.—A, Slugwonii of Sawfly; b, cocoon—both much magnified;Sawfly, with lines showing natural size. The infestation of the Pear and Cherry Sawfly, figured above, hasbeen known for more than a hundred and fifty years as injurious toleafage of various kinds, and especially to that of Pear, Cherry, andsome other kind of fruit trees by means of its small, slimy, Slug-like,blackish, or bottle-green caterpillars feeding on the upper sides of theleaves until, in cases of severe attack, nothing is left but a networkof veins held together by the skin of the under surface of the leaf. In some years, as in 1896, the infestation has been widespread,and caused a great deal of damage ; but, so far as reported, it neverreaches the height, in this country, of being one of our great fruit pests,and with moderate care (since its life-history has been known) i
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Keywords: ., bookauthorormerode, bookcentury1800, bookdecade1880, bookyear1884
