Insects, etc., Injurious to Nuts. 



297 



THE NUT-LEAF BLISTER MOTH. 



(Li/Jinnillr/is I'Di'ij/i. Xicelli.) 



Xut leaves, liotli wild and cultivated, are often seen to Ije marked 

 with large pale lilisters, rangini; rip to nearly h iucli in widtli. Tliese 

 blisters are sometimes roundisli, at others rather elongate. Thuy are 

 caused by a amall leaf- 

 mining moth caterpillar, 

 known as Li/JiocoI/i/is 

 i-oii/li. These mines occur 

 on the upper sides of the 

 leaves. Another species, 

 Lithocdlh'tls iilccllii, occurs 

 on the lower sides, l.iut 

 1 am not sure if tliis 

 species dccurs in Ihitain. 



I'uriug the late sum- 

 mer of 1!J06 the nut leaf 

 miner seems to have been 

 alinormally abu n d a n t, 

 both in the hedgerows on 

 hazel and amongst cul- 

 tivated cobs and filberts 

 in many parts of Britain. 



The damage done to 

 the leaves, especially in 

 young plantations, must 

 have been severe, checking 

 the further gr(.iwth and 

 development of the shoots. 



In this country it is common in Devonshire, Somersetshire, 

 Gloucestershire, Surrey, Kent, (.'hesliire, and lias occurred in various 

 parts of Yorkshire (Stainton recording York, Scarljorough, and 

 Stockton-on-Tees), the last-named authority also gives the (Jumlierland 

 Lake district, and Cockburnspath in Berwickshire. 



In 1906 it was very abundant in parts of Kent, some cobs being 

 seen with all the leaves blistered, many having six or seven blisters 

 on them. Badly attacked trees were seen in Devonshire, but I only 

 noticed it in one place in Worcestershire and one in Hereford si i ire. 



Fir.. 201. — Nl'T J,EA\'KS .IIIXKI) i'.\ THE NLT-I.KAF 

 BI.LSTEl; Mn'I'H T.A];\.E. 



