Insects Attacking the Pecan 167 



larva usually pupates in dried nuts, and before pupating it 

 ties several nuts together so they will not fall to the ground. 



The second generation appears in June or July, by which 

 time the number of larv« is considerably decimated by 

 parasites. On that account the damage by this generation is 

 not very great. The moths of the second generation lay 

 their eggs on the calices of the nuts much as those of the 

 first, except that a larger number are laid at the base of the 

 nut. The larvae tunnel out the nuts when they are about 

 half grown and pupate in them after spinning a cocoon 

 similar to those of the first generation. 



The larv« of the third generation do not enter the nut 

 proper but work around between the hull and the nut and 

 pass their life there, and moths Avhich emerge from the 

 pupge lay their eggs on buds. The larvae which issue from 

 this generation are those which pass the winter. 



ControL 



To control this insect is difficult, but with a proper 

 knowledge of the life history and with adequate equipment it 

 can be done effectively. Control measures must be adopted at 

 the critical time. It is necessary to have a spray outfit w^hich 

 will maintain at least 250 pounds pressure, and greater than 

 that is desirable. It is advised that only gasoline spraying 

 outfits be employed. A gun should be used so that the spray 

 may reach the highest part of the tree at a good pressure. 



There is a wide range in the strength of spra}^ Most ento- 

 mologists in the Southeast recommend only one pound of 

 arsenate of lead powder to fifty gallons of water, and consider 

 any more than this largely a waste of material; but ento- 

 mologists west of the Mississippi favor the use of as high as 



