12 CIECULAR 3 8 6, U. S. DEPAETMENT OP AGRICULTURE 



Leave the stack for at least 12 hours before disturbing it, and air 

 the supers well before storing them. 



Carbon tetrachloride is effective against wax moths, but does not. 

 have enough penetrating power to kill larvae in cocoons or in thickly 

 webbed refuse. It is a colorless liquid with a sweetish, disagreeable 

 odor. The gas formed is heavier than that of carbon disulphide, 

 and it is used in the same way. The gas is noninflammable and non- 

 explosive, but poisonous. 



GENEEAL DIBECTIONS ANB SUMMAEIZED INFORMATION ON THE USE OP FTJMIGANTR 



Use not more than five supers in a stack and seal the joints with 

 gummed-paper tape to make the stack gas tight. With gases heavier 

 than air, make sure that the base of the stack is tightly closed, since 

 the gases sink to the bottom of the stack and may escape. A pad of 

 newspapers placed beneath the stack will help to confine the gas. 



Fumigate out of doors, if possible, or at least in a well-ventilated 

 room. Read carefully the directions for using the selected fumigant 

 and have everything in readiness before fumigation is begun, espe- 

 cially if cyanide is to be used. 



Caution. — Carbon disulphide gas is KigKkf eo^losive, and any 

 chance of ignition must he carefully guarded against. Both carbon 

 disulphide and. calciwrn cyanide and their gases are poisonous to 

 people and to animKds and must be stored and Kcmdled vAth extreme 

 care. 



When using paradichlorobenzene, put the crystals directly on the 

 top bars of frames of the top super, as shown in figure 6, or on a 

 paper laid on the top bars, and renew them throughout the season 

 whenever the crystals have disappeared. 



As th.e other fumigants mentioned are not effective against rein- 

 festation from hatching eggs, examinations must be made at intervals 

 to see if any eggs have hatched, especially if the storage room is 

 warm. If the temperature is above 70° F., repeat the treatment after 

 2 or 3 weeks. The stacks being fumigated must be kept sealed for at 

 least 12 hours, and preferably for 24 hours. 



Air the combs thoroughly before placing them on the hives. 



Table 1 gives an outline for reference in fumigating against the 

 wax moth. 



CONTROL MEASURES IN STORED COMB HONEY 



The control for wax moth damage to stored comb honey is the same 

 as for other stored comb products. The supers should be removed 

 from the colonies as soon as possible after the flow ceases and piled 

 in tiers of not more than 8 to 10. All joints between supers should 

 be covered with paper, and the bottom of the stack should be sealed 

 to prevent leakage of gas. Paradichlorobenzene crystals should be 

 sprinkled over the sections of each super as it is placed in the tier as 

 well as on the sections of the top super, since circulation of air is 

 poor in such stacks. The treatment should be continued until the 

 honey is graded and marketed. Carbon disulphide may be used 

 according to the directions given, if desired. 



