1929] SERVICE AND REGULATORY ANNOUNCEMENTS 63 
ment of farm products from New York City is brought under the same certifica- 
tion requirements as apply to the remainder of the main regulated area, and 
regulations 5, 6, and 7 have been rearranged in the interest of simplification. 
You are requested to see that all requirements of the quarantine order are 
carefully observed at your office. See paragraph 1, section 467, Postal Laws 
and Regulations. 
Sincerely yours, 
R. S. Regak. 
Third Assistant Postmaster General. 
INSTRUCTIONS TO INSPECTORS ON THE DISINFECTION OF NURSERY PRODUCTS 
FOR THE JAPANESE AND ASIATIC BEETLES 
P. Q. C. A.— 224. April 16, 1929. 
At the request of the Plant Quarantine and Control Administration, the 
Bureau of Entomology has submitted recommendations on the disinfection 
methods to be employed for the elimination of the Japanese and Asiatic 
beetles from nursery stock and other plant materials as well as from sand, 
soil, earth, peat, compost, and manure. These recommendations have been 
reviewed by members of the administration staff and found satisfactory as a 
basis of quarantine enforcement. They are therefore submitted for your guid- 
ance in carrying out treatments as a basis for certification under quarantines 
48 and 66. 
All treatments herein described fall within the methods authorized under 
the quarantine regulations, except those providing for the temporary disinfec- 
tion of soil plots, coldframes, hotbeds, etc., with carbon disulphide or naphtha- 
lene. These treatments have been authorized by the administration under the 
emergency existing in certain nurseries in the spring of 1929, but are not to be 
employed in the future except on specific authorization of the Chief of the Plant 
Quarantine and Control Administration. 
When improvements in the methods described in this paper are developed 
as a result of experience and experimental work, they will be incorporated in 
amendments or revisions of these instructions, and are not to be employed as a 
basis of certification until so authorized by the administration. 
C. L. Maklatt, 
Chief, Plant Quarantine and Control Administration. 
Disinfection of Nubseby Products for the Japanese and Asiatic Beetles 
Prepared by Walter E. Fleming, entomologist, Japanese beetle laboratory, 
United States Department of Agriculture, Moorestown, N. J., March, 1929 
table of contents 
Page 
*. Introduction.. 63 
2. Disinfection of soil in the absence of plants 64 
A. Potting soil 64 
1. Carbon-disulphide fumigation 64 
2. Naphthalene 65 
3. Steam 65 
B. Band, peat, compost, and manure.. 65 
C. Soil plots, coldframes, hotbeds 66 
1. Lead arsenate.. 66 
2. Carbon-disulphide fumigation 66 
3. Carbon-disulphide emulsion 66 
4. Naphthalene 67 
3. Disinfection of soil about the roots of plants.. 67 
A. Removing infestation by washing with water 67 
B. Hot water 68 
C. < !arbon-disulphlde-emulsion dip 68 
1). Carbon-disulphide-emulsion field treatment 
4. Directions for treating different nursery plants - 
\. Potted greenhouse plants 
B. Hardy herbaceous plants 
C. i >eciduous ornamental -limbs - ( 
i ». Deciduous ornamental trees 
i . i '.road leaf evergreens 
!•'. Narrow leaf evergreens 
1. INTRODIC ITION 
The Immature stages of the Japanese beetle, i'<>i>i!H<' japonica Newman, 
usually cause little economic damage by feeding on the roots of the different 
varieties of nursery plants. The adult, however, is a recognized agricultural 
