24 



FARMERS BULLETIN 843. 



extending from Florida 

 to the extreme western 

 border of Texas, and as 

 far north as New Hamj*- 

 shire. When the buds 

 of pecan trees are open- 

 ing, or just after they 

 have begun to unfold, 

 the hibernating larvae 

 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 to 

 pupae within the larval 

 cases (fig. 28, 6, e). The 

 pupa period lasts about 

 two weeks, and during 

 June the moths (fig. 

 28, a) appear in num- 

 bers on the pecan. 

 The eggs are deposited 

 on the foliage and they 

 hatch within a few days . 

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

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

 until a short time before the 

 foliage drops in the fall. 

 The larvae migrate then to 

 the twigs or larger limbs 

 or trunks, where they at- ^ j 

 tach their cases and spend 



the winter. HL H -f 



w%k if 



CONTROL MEASURES. 



If this insect occurs in 

 injurious numbers in the 

 spring it can be controlled 

 readily by spraying the trees 

 with arsenatc of lead at the 

 rate of 1 pound of the pow- 



j j r ^ f ^^ FIG. 28. The pecan cigar case-bearer: a, Moth; 6, c, larvae in 



dered Or 2 pounds of the cases. Enlarged. (Russell.) 



FIG. 27. ~ The pecan cigar case-bearer: Type of injury by larva to 

 pecan leaflets. 



