-31- 
aphids, the common red spider, one species of thrips, two species 
of mealybugs, and immature stages of the southern armyworm. Con- 
centrations sufficient to kill Japanese beetles v:ere tested on a 
variety cf plants without injury. Special apparatus has been de- 
vised for introducing this and other fumlgants into refrigerator 
cars. 
(123) 
Fumigation of potatoes by methyl bromide as a condition of certifi- 
. cation of potatoes moving by refrigerator car from the area 
listed in regulation 5 of quarantine No, 48. U. S, Dept. Agr., 
B.E.P.Q. 473, 1 p. 1938. 
The following treatment was authorized as a basis for certifi- 
cation, of potatoes moving to points outside the ^Japanese beetle 
quarantine areas between June 15 and October 15: "Fumigation of 
potatoes in dry refrigerator cars with methyl bromide at a dosage 
of 2 pounds per 1,000 cubic feet of space, including the space 
occupied by the potatoes and bunkers of the cars, for a period of 
2 hours during which time the car shall remain tightly closed with 
the plugs in place in the ventilator hatches. The temperature 
within the car when fumigated shall not be less than 70° F. Pro- 
vision shall be made for circulating the mixture of air and fumi- 
gant in the car for as long a time as is deemed necessary by the 
inspector. At the end of the fumigation. period the hatches shall 
be opened, the plugs removed, screens placed in the hatch openings, 
and the car shipped under standard ventilation." 
(124) 
Fumigation of onions by methyl bromide as a condition of certifi- 
cation of onions moving by refrigerator car from the area listed 
in regulation 5 of quarantine No. 48 „ U. So Dept. Agr., B.E.P.Q. 
475, 1 p. 1938. 
The same treatment for Oiiions as that described for potatoes 
in the previous reference (B.E.P.Q. 473) is authorized. 
(125) 
Fumigation of tomatoes by methyl bromide as a condition of certi- 
fication of tomatoes moving by refrigerator car from the area 
listed in regulation 5 of quarantine No. 48. U. S. Dept. Agr«, 
B.E.P.Q. 480, 1 p. 1938. - . . 
The same treatment for tomatoes as that described for pota- 
toes in B.E.P.Q. 473 is authorized. 
(126) 
Administrative instructions to inspectors on the treatment of 
nursery -products, fruits, vegetables, and soil, for the Japan- 
ese beetle (Sec. 301.48a). U. S. Dept. Agr., B.E.P.Q. 499, 20 
pp. 1939. 
The use of methyl bromide is ruthorized for treatment in a 
fumigation chamber of plants with or without soil, using 2 l/2 
pounds of gas per 1,000 cubic feet (including space occupied by 
the load) at a temperature of not less than 63° F. for 2 l/2 hours. 
