170 Pecan-Growing 



the buds are unfolding. The same spray as that employed 

 for the pecan leaf case-bearer will be satisfactory. (See 

 Fig. 31). 



PECAN SHUCK-WORM 



(Laspeyresia caryana, Fitch.) 

 The pecan shuck-worm spends the winter in the larval 

 stage in the husk of the pecan, either hanging on the tree or 

 on the ground. Pupation takes place in the husk in very 

 early spring. Many of the adult moths emerge before the 

 leaf and nut development of the pecan, and they are thought 



Si -^ -.-■-r-'im 



Figure 31. — Spraying the pecan nursery. 



to lay most of their eggs on the pignut hickory, which is 

 earlier than the pecan. The eggs are laid on the nuts and 

 leaves of the pecan during the summer. The incubation 

 period of the eggs is about five days. As soon as they hatch, 

 the larvae bore into the husk of the nearly matured pecans 

 and begin feeding. They sometimes enter the nut, but 

 usually confine their feeding to the husk. If the nuts are 

 attacked in their early stage of growth, they fail to develop 



