24 



FARMERS BULLETIN 843. 



extending from Florida 

 to the extreme western 

 border of Texas, and as 

 far north as New Hamp- 

 shire. Wlien the buds 

 of pecan trees are open- 

 ing, or just after they 

 have b(^gun to unfold, 

 the hibernating larvse 

 become active and at- 

 tack them, continuing 

 their feeding operations 

 on the foliage (fig. 27) 

 until about the middle 

 of May (in Florida), 

 when they become full 

 grown and transform t o 

 pupae within the larval 

 cases (fig. 28, 5, r). The 

 pupa period lasts about 

 two weeks, and during 

 June the moths (fig. 

 2S, a) appear in num- 

 bers on the pecan. 

 The eggs are deposited 

 on the fohage and they 

 hatch within a few days. 

 Upon hatching, thelarva3 feed first as leaf -miners, but later in the sea- 

 son they construct the small cases, in which they feed upon the leaves 

 mitila short time before the 

 foliage drops in the fall. 

 The larva? migrate then to 

 the twigs or larger limbs 

 or trunks, where they at- 

 tach their cases and spend 

 the winter. 



CONTROL MEASURKS. 



If this insect occurs in 

 injurious nmiibers in the 

 spring it can be controlled 

 readily byspraying the trees 

 with arsenate of- lead at the 



rate of 1 pound of the pOW- ^^^ ^^_^^^ ^^^^ ^.^^^ case-bearer: a, Moth; 5, c, larva^ 

 dercd or 2 pounds of the cases. Enlarged. (Russell.) 



c-;iso-l.iearpr: Type of injury by lari 

 pecan leaflets. 



