. The American fruit culturist. these regions. The insect is open to successful attack only in its larva orborer stage, and in itspupa stage; the pupaeare reached only bysearching for the co-coons and destroyingthem. After four years ofcareful experimentingwith most of the meth-ods recommended tocontrol this pest, we areled to the following con-clusions : The digging outmethod is the onlythoroughly successfuland safe v/ay of killingthe peach-tree method is expen-sive in time and labor,but our experience leadslis to believe that anyother equally as suc-cessful method will costjust as
. The American fruit culturist. these regions. The insect is open to successful attack only in its larva orborer stage, and in itspupa stage; the pupaeare reached only bysearching for the co-coons and destroyingthem. After four years ofcareful experimentingwith most of the meth-ods recommended tocontrol this pest, we areled to the following con-clusions : The digging outmethod is the onlythoroughly successfuland safe v/ay of killingthe peach-tree method is expen-sive in time and labor,but our experience leadslis to believe that anyother equally as suc-cessful method will costjust as much. To makeit a success the dig-ging out should bethoroughly done, not only on every tree in the orchard, but also on all old relicsof peach-trees in the immediate neighborhood. A half-dozensuch old relics left untreated near by will serve thoroughlyto restock an orchard with borers every year, so that the dig-ging out method, although practised each year, will neverreduce the numbers of the borers below the danger Fig. 259.—Work of a Single Borer in a Peach-tree, natural size, w b, Burrow of borer;g-y gummy mass ; p, pupa projecting fromcocoon. 194 DESTRUCTIVE INSECTS. This is a very important factor in the success of the diggingout method. Dig out the borers in June or in June andSeptember in northern peach-growing districts. We kept out about two-thirds of the borers with tobaccostems wound around the tree just below the surface of thesoil. The old mounding method evidently has considerablevalue as a preventive, and is, perhaps, the cheapest methodyet devised. It is the most practicable method yet suggestedfor combating the insects in nurseries. Paper protectors,when carefully put on and kept intact during the dangerperiod, will prove a valuable and very cheap preventivemeasure, especially when combined with the digging outmethod. Wooden boxes or wire cages did not prevent theentrance of the borer. The favorite method of preventing the ravages of the peach-tre
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