Apple Insects 



345 



Fig. 131. Apple-scab. 



TTie 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 

 soap. Nurserymen often 

 catch the adults by the 

 use of sticky shields. 

 .4ppr,B Leap-Rollek 

 [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 ia the 

 young apples, deforming 

 them. Eggs are laid in 

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

 smooth, vamish-Uke 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 apphcation 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 

 through, causing decay 

 and falling of the fruit. 

 The parent flies appear 



FiQ. 132, Bordeaux injuiy. 



