Investigation of Scarring of Fruit by Apple Redbugs 20^ 



with egg laying, which produces the characteristic crescent-shaped scar. 

 The typical full-grown curculio-scar (fig. 50) is a half -moon with a pro- 



FlG. 50. PLUM CURCULIO SCARS FROM DIFFERENT VARIE- 

 TIES OF APPLES, SHOWING MODIFICATION OF THE SCARS 



jection on the straight side where the egg was deposited. The scars are 

 frequently much misshapen, but the straight side with an evenly curved 

 margin opposite will always distinguish them from the redbug scars, which 

 always have irregular margins due to the splitting and spreading of the 

 wound. 



scars produced by frost injury 



The writer observed that frost injury to young apples may develop 

 into scars that very much resemble the large russet scars made by redbugs. 



Fig. 51. GENESEE FLOWER APPLE SHOWING BROAD RUSSET 

 SCAR CAUSED BY FROST INJURY 



The spring of igiq was a season when frost injury was noted in many 

 localities in western New York. The frost occurred on ATay 28, which 



3T3 



