CONTROL OF THE CIGARETTE BEETLE 



9 



56°. The cooler nights which often occur at the time of emergence 

 of the spring brood may affect the migration of beetles, although this 



_600 



CO 



Q550 

 00 500 

 °450 

 fc 400 



CL' 



§350 

 rr300 

 a-250 

 O200 

 150 



LU 



o 100 

 < 



LU 



5 



50 



•MAXIMUM TEMPERATURES 

 ■©MINIMUM TEMPERATURES 



M vm 



J 







100 



90 



80 



70 



60 



50 



40 



7 24 14 28 20 13 

 JULY AUG. SEPT. OCT. NOV. 



Figure 8. — Average catches of the cigarette beetle, in relation to the temperature and the season, in an 

 open-storage warehouse containing domestic flue-cured tobacco. Experiment 2. 



behavior is probably controlled to a greater extent by the season of 

 the year. 



Table 2. — Cigarette beetles caught in open-storage warehouses filled with Turkish 

 and domestic tobacco, in relation to temperature and season, experiment 2, 1938 



TURKISH TOBACCO WAREHOUSES— 25 TRAPS STARTED ON JUNE 1* 



Date 



Inter- 

 val 



Beetles caught 



Total 



Average 

 per trap 



Temperature 



Average 

 maximum 



Average 

 minimum 



Mean 



June 15.. 

 June 30- 

 Julyl7- 

 July31- 

 Aug. 14. 

 Aug. 21 _ 

 Sept. 9_. 

 Sept. 21. 

 Sept. 28. 

 Oct.6-_- 

 Oct. 20 .. 

 Nov. 13. 



Days 

 14 

 15 

 17 

 14 

 14 

 7 



19 

 12 



Number 

 850, 000 

 551, 050 

 775, 400 



4, 718, 000 



5, 760, 000 



2, 436, 000 

 4, 709, 500 



17, 689, 500 

 22, 100, 000 

 12, 810, 000 



3, 720, 000 

 2, 625, 000 



Number 



34,000 



22, 042 



31,016 



188, 720 



230, 400 



97, 440 



188, 380 



707, 580 



884, 000 



512, 400 



148, 800 



105, 000 



'F. 

 74.5 

 79.5 

 75.5 

 79.5 

 78.0 

 75.5 

 75.0 

 74.5 

 72.5 

 67.0 

 56.5 

 53.5 



DOMESTIC TOBACCO WAREHOUSE— 20 TRAPS STARTED ON JUNE 15 2 



June 23 . 

 July 7--- 

 July24-- 

 Aug. 14. 

 Sept. 28. 

 Oct. 20-. 

 Nov. 13. 



405, 000 

 420, 000 

 275, 000 

 2, 255, 000 

 1, 655, 000 

 500, 000 

 170, 000 



20, 250 



96 



62 



21, 000 



91 



65 



13, 750 



89 



65 



112, 750 



90 



67 



82, 750 



86 



63 



25, 000 



74 



46 



8,500 



66 



41 



79.0 

 78.0 

 77.0 

 78.5 

 74.5 

 60.0 

 53.5 



1 These warehouses consisted of 5 sections having a total of 1,897,000 cubic feet of space. 

 ^This warehouse consisted of 4 sections baring a total of 1,517,000 cubic "eet of space. 



