10 



BULLETIN 571, U. S. DEPARTMENT OF AGRICULTURE. 



As is shown in Table II, the first moths of the season issued on 

 May 15 and the last adults appeared on August 5, making a period 

 of 82 days for the emergence of all individuals. The maximum 

 emergence for a single day occurred on June 24, when 38 moths 

 issued. A summary of Table II shows that 29 moths emerged from 

 May 15 to 31, 238 from June 1 to 30, 114 from July 1 to 31, and 4 

 from August 1 to 5. Out of 238 moths to issue in June, 71 came 

 forth during the first half of the month, while 167 emerged during 

 June 15 to 30, which marks the period of maximum emergence. It 

 is to be noted also that of the 114 moths issuing during July 100 

 emerged from July 1 to 14. So far as the records go, the last moth 

 observed in the field was on August 1. From July 20 to the close 

 of the month there was an extremely sudden decrease in the number 

 of adults in the various pecan orchards in which observations were 

 made. 



During the season of 1915 rearing cages to determine the emer- 

 gence of moths were examined daily, except on June 13, 15, 17, July 

 6, 13, 15, and 22. The dates of issuance of 591 individuals are 

 shown in Table III. 



Table III.- 



■Time of emergence of moths of the pecan leaf case-bearer during 1915 at 

 Monticello, Fla. 



Number 



Date of 



Number 



Date of 



Number 



Date of 



Number 



Date of 



of 



emer- 



of 



emer- 



of 



emer- 



of 



emer- 



moths. 



gence. 



moths. 



gence. 



moths. 



gence. 



moths. 



gence. 





1915. 





1915. 





1915. 





1915. 



2 



May 22 



6 



June 5 



31 



June 21 



6 



July 4 



3 



May 24 



20 



June 6 



31 



June 22 



13 



July 5 



1 



May 25 



11 



June 7 



24 



June 23 



22 



July 7 



1 



May 26 



5 



June 8 



12 



June 24 



7 



July 8 



4 



May 27 



7 



June 9 



6 



June 25 



6 



July 9 



2 



May 28 



8 



June 10 



14 



June 26 



10 



July 10 



10 



May 29 



22 



June 11 



11 



June 27 



13 



July 11 



1 



May 30 



22 



June 12 



16 



June 28 



5 



July 12 



2 



May 31 



33 



June 14 



16 



June 29 



10 



July 14 



16 



June 1 



12 



June 16 



6 



June 30 



3 



July 16 



5 



June 2 



12 



June 18 



16 



July 1 



1 



July 17 



21 



June 3 



16 



June 19 



10 



July 2 



2 



July 21 



6 



June 4 



28 



June 20 



22 



July 3 



2 



July 23 



As shown in Table III, the first moth of the season issued on May 

 22 ; and the last adults appeared on July 23. A summary of Table 

 III shows that 26 moths emerged from May 22 to 31, 417 from June 

 1 to 30, and 148 from July 1 to 23. Out of 417 adults issuing during 

 June, 235 appeared from June 16 to 30, which period marks the time 

 of maximum emergence. It should be noted also that of 148 moths 

 emerging during July, 140 issued from July 1 to 14. 



The habits of moths in pecan orchards. — When the moths are at rest 

 the wings are folded rooflike on the abdomen and the head and 

 anterior part of the body are held in a somewhat elevated position. 

 During the day the moths prefer to frequent the weeds at the base of 

 the trees, but they are also to be found hiding in the dense foliage of 



