-23- 
METCALF, C. L., and FLINT, W. P. ("8) 
Destructive and useful insects. 981 pp. New York and London. 
1939.' 
The physical properties of methyl bromide are described, "It 
is about as toxic to many insects as chlo ropier In and is'' used at 
dosages from 1 to 2 l/2 lbs, per 1,000 cubic feet for 12 to 16 
hours in buildings. It is not narcotic to tho insects and kills 
very slowly. It is recommended for use in ordinary atmospheric 
fumigation., as in mills and greenhouses, and in vacuum chambers, 
and also for such stored products as fresh fruits and green vege- 
tables, dried fruits and other stored food products, household 
goods, nursery stock and ornamental flowers, and for rodent con- 
trol. It does not injure the germination of seeds if they are dry. 
High temperature and humidity increase the effectiveness of this 
gas," It appears to be a very premising fumigant, but much is 
still to be learned about it (pp. 288-289). 
For the control of bedbugs in congested places, individual 
rooms or apartments can safely be fumigated with commercial gases 
containing methyl bromide (p. 888). 
MINISTERSTWO SPEAW VJ0JSK0V7YCH. (89) 
Preparation of methyl bromide. Polish Patent 24,777, May 25, 1937. 
Sulfur dioxide and bromine react in the presence of water to 
form hydrobromic acic! and sulfuric acid. To this are added, drop- 
wise, methyl alcohol and excess sulfuric acid, and the methyl bro- 
mide obtained is distilled off. 
MUNF.O, II. A. U. (90) 
Some observations on the use of methyl bromide as a fumigant, Ent. 
Soc. Ontario, Ann. Hpt. 68: 72. 1938. 
This is a brief summary of studies in Quebec on the use of 
methyl bromide as a fumigant for apples. It was highly toxic to 
apple insects when applied at the rate of 2 pounds per 1,000 cubic 
feet at 80° F. In each test an initial vacuum of 3 inches absolute 
pressure was dropped to 27 inches after introduction of the fumi- 
gant, the vault temperatures being maintained at 80° by fan circu- 
lation. In several varieties of apples exposures of 90 and 60 
minutes killed larvae of Carpocapsa pomonolla (L.) and Rhagoletis 
pom onella (lYalsh), respectively. Eggs of Rhagoletis in the fruits 
•e killed in 30 minutes, but 60 minutes were necessary for eggs 
of Carpoc apsa . In same experiments, however, it appeared that 
methyl bromide caused injury to apples. 
(91) 
Some fumigation methods employed in the United States to prevent 
the spread of the Japanese beetle ( Pop il 1.1a japoni ca Hewn,). Rat. 
Soc. Ontario, Ann. Rpt. 70: 80-83. 1939, 
Methods of fumigating fruits, vegetable s, potted plants, and 
nursery stock with methyl bromide are described. 
