48 Lessons in Fruit Go-owing. 



50. The apple ina§:§:ot {Trypeta pomonella), where it 

 abounds, is often more destructive than the codling moth, 

 as it renders the fruit worthless for any purpose except 

 stock feed. It is most destractive to apples grown on 

 sandy soil, in cultivated orchards, and to early varieties. 

 It does not always betray its presence in the fruit by con- 

 spicuous external marks, hence infested fruit is often mar- 

 keted, and thus the insect is spread to new localities. 

 Fortunately it does not spread readily from tree to tree, 

 and hence is not likely to become generally disseminated. 



The infested fruits generally ripen and fall prematurely 

 and the larvse do not escape until the fruit has fallen, hence 

 by promptly destroying all fallen infested fruits, this insect 

 may be kept in subjection. Hogs and sheep in the orchard 

 greatly aid this work. 



51. The apple curculio {Anthonomus quadrigibbus), in- 

 jures apples greatly in some localities by stinging and eat- 

 ing the fruit, making it ill-shaped and under-sized. The 

 beetle feeds considerably upon the young fruit, making, 

 however, only a puncture through the skin. As the larva 

 escapes from the fruit while the latter is attached to the 

 tree, it cannot be destroyed by hogs or sheep. Jarring the 

 trees over sheets, as de- 

 scribed for the plum curcu- 

 lio, (99) and spraying as de- 

 scribed for the codling 

 moth (19) are most likely to 

 prove effective treatments. 



52. The tent caterpillar 

 [CUsioca mpa Americana), 



forms the conspicuous tent- Fig. 9. Apple curculio. a, back view; 

 ,., , j_i 1 lb, side view, both magnified ; natural 



like nests upon the branches size sliown at left. (After RUey.) 



