Insects Injurious to the Apple. 



149 



grountl form lliat causes so iiincli ilaiuage to the ajiple orchards in 



tlie southern half of the State, and to apple nursery stock throui^lmut 



the State, and further he says that 95 per cent, of the cases of so- 

 called "root-rot" is in reality the result of the 



attack of A\"oolly Aphis. 



In Britain in f894 I undoubtedly found 



this aphis on the roots of apple trees at 



Shalford, in Surrey, the trees dying under 



the attack, and again at Alljury in the 



fcillowing year. The attack was looked upon 



as abnormal, aud lor some years all cases 



that came uudiu' my notice were paid little 



attention to. This was due entirely to the 



hict that in some ]ireparati(ms maile from 



material sent me from I'addock Wood, in 



Kent, ScJii-.iiiiriird f(ii/ii:iis «-as alone prescnt( 2 ). 



Shortly aftei', ('onuold I'oiiud the galls on the 



roots, and tlie matter \\'a.s placed fieyonil doubt (i.l), and the statement 



concermn'j; S. full iriis wds seen to be erroneous as fax as tlu_>. gcrnaal 



attack of Woolly Bliglit concei'us 

 tlie apple. The cases sent in were 

 from gardens with currants, lettuce, 

 etc., growing beu(.'ath the trees; on 

 re-examining the slides, I hud I bin' 

 are S. foiJieiif:,' doulitless thi.iuglu 

 by the senders, 0A\ung to their jno- 

 ducing white atooI, lo lie the sami' 

 as the specimens actuall\" lai the 

 apple roots. 



During the past ti\-e years \'cry 

 nmny cases of the ground form 

 have Ijeen examined, and many 

 reported to me by growers. 



Mr. Wood of Crockenhall (4) 

 has been the hrst to recognise this 

 fact in its practical importance ; 

 having lifted no less than -1:0,0()0 

 voung stock, more or less infested 

 «-ith this pest, he treated it with 



the "gas treatment," and cleared the pest by such means. 



* This is now known to bo the same as the Ehu Leaf AVooUy Aphis 



(Scliizoticiini, i(liiii). 



I /•'. liilcii:/,',:. 



-c.vi.j.s <;:,\rs!':it hn uoius \',\ 

 woi'i.LV ,\i'nrs. 



