10 



NEW YORK STATE MUSEUM 



Fig. 8 Apple tree borer, adult 

 beetle 



Treatment: spray beetles with ^ pound whale oil soap to 1 gal- 

 lon water, dust vines with ashes, etc.; handpicking. 



9 Apple tree borer ( S a p e r d a 

 Candida). The presence of this 

 insect is usually indicated by " saw- 

 dust " or diseased bark and beneath 

 the latter, legless, white, round headed 

 borers are found. The brown beetles, 

 striped with white, about 1 inch long, 

 occur from June to August. Two or 

 three years are required to complete 

 the life cycle. 

 Treatment: protect base of tree with wire netting. Dig out the 

 young borers in the fall. Cut and burn badly infested trees. 



10 Pear midge (Diplosis py- 

 r i V o r a ) . The dwarfed, deformed, 

 infested fruit drops early, and within 

 occur thick bodied, pale yellow mag- 

 gots. The parent midge appears 

 about the time the trees are in bloom 



and deposits 

 her eggs. 

 The young 

 grow rapidly 

 and cause a 

 distortion of 

 the fruit, 

 which usu- 

 ally cracks 

 with the first 

 good rain 



about June 1. The larvae then enter the 

 ground and pupate. 



Treatment: destroy infested fruit. 



11 Peach bark borer ( S c o 1 y t u s 



Fio. 10 Burrows of peach bark , ^ ^^^ , , p re i- j 



borer In a young apple tree T U g U 1 S U S ) . The bark Of aftectea 



Fig. 9 Pear midge. Section of pear 

 containing the larvae, and an uuinfested 

 one for comparison of forms 



