20 



NEW YORK STATE MUSEUM 



Fig. 26 Sugar maple borer, parent 

 beetle (origiual) 



this pest. The white, legless, fleshy grubs of this beetle fre- 

 quently cause serious injury by running transverse burrows just 



beneath the bark. The stout, black 

 beetles, about 1 inch long, with 

 bright yellow markings, occur from 

 June to August. They deposit eggs 

 in the bark, and these places become 

 more apparent later through sap 

 flowing from the living tissues 

 gnawed by the grub and producing a 

 discoloration around the wound. 



Treatment: burn badly infested 

 trees. Search for places where eggs 

 have been deposited and dig out the young borers in the fall. 

 Protect trees with carbolic soap 

 wash from June to August. 



35 Maple tree pruner ( E 1 a p h i- 

 dion villosum). Small 

 limbs of maple, oak and other 

 trees nearly eaten off by an insect 

 and dropping in September, usu- 

 ally contain the burrows of this 

 species. The parent of the borer 



is a nearly cy- 

 lindric, brown 

 beetle which usu- 

 ally remains with- 

 in the fallen 

 twig till the next 

 June. 



collect infested 

 limbs on the ground and burn be- 

 fore spring. 



36 Elm leaf beetle ( G a 1 e r u - 

 cella luteola). Irregular 

 round holes are eaten in young foliage, followed by the grubs 

 gnawing the under portions of the leaves, which then dry and 



Fig. 28 Maple tree 

 pruner (original) 



Treatment : 



Fig. 27 Injury produced by a transverse 

 burrow of borer in a sugar maple about 18 

 inches In diameter 



