U 



THE JOURNAL 



OF THE 



BOARD OF AGRICULTURE. 



Vol. V. No. 2. SEPTEMBER, 1898. 



ENGLISH ORCHARDS. 

 Part II.* 



Among the insects that injure apple trees the woolly 

 aphis [Schizo7ieura lamgcra) causes the most harm to the 

 trees themselves. This insect may be at once recognised by 

 che white patches, which are colonies of aphides covered 

 with a substance like wool, upon the trunks and branches, 

 and especially upon wounds and scars caused by rough 

 pruning, or lopping off branches, or by the rubbing of 

 stakes. Infestation extends gradually from these centres, 

 abnormal growths are formed, and the whole tree becomes 

 seriously injured, and not infrequently dies, before the origin 

 of the mischief has been recognised. In many orchards the 

 harmful work of this aphis has been going on undisturbed 

 for many years, not only upon the branches but also upon 

 the roots, where it does great harm. The growth of lichens 

 and mosses upon the limbs and branches very often conceals 

 the dangerous spread of the woolly aphis. Apple trees 

 should be periodically examined for this pest, and if it 

 is discovered on them the trees should be sprayed in the 

 autumn with strong kerosene emulsion : made by dissolving 

 J lb. of soft soap in a gallon of boiling water (rain water 

 should be used, or soda added), and adding two gallons 



* Continued from Vol. V. No. i, June, 1898. 



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