Apple Insects 



345 



The young nymphs may be killed by spraying with "black 



leaf 40" tobacco extract, three-fourths of a pint in one hundred 



gallons of water, adding 



three to four pounds of 



soarj. Nurserymen of ten 



catch the adults by the 



use of sticky shields. 

 APPLE LEAF-ROLLER 



(Archips argyrospila). 



A green caterpillar with 



a black head, 1 inch or 



less in length when 



mature, attacks the 



opening buds, rolling 



and webbing together 



the leaves, flowers and 



young fruit into a nest. 



Holes are eaten in the 



young apples, deforming 



them. Eggs are laid in 



June in small, flat masses on the bark, and are covered with a 



smooth, varnish-like coating. They do not hatch till the follow- 



ing spring. 



To kill eggs, spray with miscible oil, one gallon in fifteen gal- 



lons of water, making the application as late as possible before 



the buds open. If the 



eggs have been neg- 



lected, recourse must be 



had to arsenate of lead, 



six pounds in one hun- 



dred gallons water. 



Apply before the blos- 



soms open. 

 APPLE-MAGGOT (Rhagoletis 



pomonella). A white 



maggot that tunnels 



apples through and 



FJG> m> Apple _ scab . 



through, causing decay 

 and falling of the fruit. 

 The parent flies appear 



FIG. 132. Bordeaux injury. 



