. Luther Burbank, his methods and discoveries and their practical application; . o >» ~ffS o s « ps M s i S S <. LUTHER BURBANK extremes of temperature of the northern Missis-sippi Valley, and others are in prospect. Especial efforts are being made, also, to de-velop varieties that will be immune to the attacksof the insect pest known as the woolly aphis,which does great damage in apple orchards, es-pecially on heavy soils and in moist climates. Thispest is relatively harmless to the treetops, but doesgreat damage when it infests the roots of a tree. Because of the immunity of t
. Luther Burbank, his methods and discoveries and their practical application; . o >» ~ffS o s « ps M s i S S <. LUTHER BURBANK extremes of temperature of the northern Missis-sippi Valley, and others are in prospect. Especial efforts are being made, also, to de-velop varieties that will be immune to the attacksof the insect pest known as the woolly aphis,which does great damage in apple orchards, es-pecially on heavy soils and in moist climates. Thispest is relatively harmless to the treetops, but doesgreat damage when it infests the roots of a tree. Because of the immunity of the pear to the at-tacks of the woolly aphis, I have made many at-tempts to find a variety of pear that would serveas stocks on which to graft apples. In a very fewcases the grafts have taken well at first, but thefinal result was a failure, from a commercialstandpoint. It is possible that a variety of pearwill eventually be foimd which will be congenialto the various varieties of apples; and, if so, theproblem of combatting the woolly aphis will havebeen solved. My experiments consisted in growing seedlingpears to get new
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