322 INSECTS INJURIOUS TO THE STRAWBERRY. 



Fin. 333. 



cases referred to. The channels formed by this larva through 

 the crown and larger roots of the plant soon cause it to wither 

 and die ; or, if it survives, to send up weakened and almost 

 barren shoots. 



This insect does not limit its depredations to the strawberry ; 

 the larva is also found boring into the tender twigs of the 

 peach-tree and killing the terminal buds. 

 In Fig. 333 we have a representation of 

 tlie larva and moth, both of the natural 

 size and magnified, also of an injured 

 peach-twig. The insect is known to at- 

 tack the peach-tree in Europe, whence it 

 has probably been imported to this country. 

 Remedies. — Dusting the plants with 

 air-slaked lime or with soot has been 

 recommended, but there seems to be no 

 way thoroughly to destroy this pest except by digging up 

 the strawberry plants, burning them, and planting afresh. 

 The larvse are subject to the attacks of parasites, which doubt- 

 less materially limit their increase. 



No. 191. — The Strawberry Crown-borer. 



Tyloderma fragarim (Riley). 



This is an indigenous insect, a beetle belonging to the 

 family of Curculios. Tlie beetle (Fig. 334) appears in June 



or July, and deposits 

 an Qgg about the crown 

 of the plant, from which, 

 when hatched, the larva 

 burrows downwards, 

 eating into the sub- 

 stance of the crown. 

 Here it remains, boring 

 and excavating, until it 

 attains full growth, when it appears as shown at a in the 

 figure, where it is much magnified. It is about one-fifth of 



Fia. 834. 



