56 



MASS. EXPERIMENT STATICN CULLETIN CC^ 



Cranberry Fruit Worm. 



Fig. 39. Cranberries with worm holes, one closed with white silken curtain. 

 Fig. 40. How the worms often work from one cranberry directly into anct".:cr. 

 Fig. 41'. Cranberries shriveled to dry husks because of its work. 



years till late Oetoher. Here they wch tlie berries into halls in wliich they 

 feed. 



Description atui Sea^^onal History. 



The EffC]. 



Tlie egg is generally oval and so plastic wiien laid that it ada))ts itself 

 readily to an irregular surface. It ai^pears rather watery at first Init soon 

 becomes pale yellow and often develops an irregular reddish streak. It usu- 

 ally is placed luider one of the lobes at tiie iiiossoni end of tiie berry (fig. 42) 

 but may be anywhere on the surface. More than one or two seldom are found 

 on a berry unless the infestation is very severe. 



Effg laying begins wiien the small l)erries start to grow and sometimes con- 

 tinues till the last of August. The normal eggs hatch in about five days and 

 parasitized ones in about eight days. 



