26 



The Philippine Journal of Science 



1913 



It is plainly seen that at a temperature of —7°. 8 the beetle in all 

 stages can be killed in four days. 



A similar experiment was carried on at the Bureau of Science 

 where the temperature varied from 8° to 14° C. This did not 

 kill the insect in any stage but only prolonged the period of 

 development. Larvae (full grown, at least 40 days old) lived 

 one hundred fifty-seven days, but did not feed. Eggs were 

 retarded in hatching; pupae developed to adults, and these lived 

 one hundred eleven days after emerging. The detailed data 

 are given in Table XVI. 



Table XVI. — Effect of cold storage on the cigarette beetle in different 

 stages, at temperatures varying from 8° to H° C. 



Stage of insect. 



Number. 



Remarks. 



EgTKB - 



20 



20 



7 

 30 

 30 

 10 



10 



Taken out after 20 days; 14 hatched; 6 destroyed 



by mites. 

 Taken out after 22 days; 3 hatched; 13 destroyed 



by mites. 

 The longest life was 30 days. 



Do. 

 The longest life was 157 days. 

 All developed and emerged; the last after a period 



of 30 days. 

 Emerged in cold storage, and lived 111 days. 



Do. 





Half -grown larvae 





Pupae 



Adults 





Cost of cold storage. — At the division of cold storage of the 

 Bureau of Supply, cigars would be stored according to the fol- 

 lowing schedule of charges: 



Table XVII. — Schedule of charges for storage space at the division of 

 cold storage, Bureau of Supply. 



Space occupied. 



Charge per cubic meter. 



Per day. 



1 

 Per 30 days. 



Less than 1 cubic meter - 



Pesos. 

 0.25 

 0.21 

 0.17 

 0.14 

 0.11 



Pesos. 

 7.60 

 6.80 

 5.10 

 4.20 

 3.30 



1 to 50 cubic meters - 



60 to 500 cubic meters 



600 to 1,000 cubic meters __ 



Over 1,000 cubic meters 





From 10,000 to 12,500 boxed cigars occupy 1 cubic meter. 

 At the above rate one could effectively treat cigars at 10 centavos 

 per thousand by using 1 cubic meter of space for a period of 

 four days. The ordinary tin-lined shipping box would be very 



