/ } \\\l \1. REPORTS 01 DEPARTMEN1 01 AGRICULTURE, i 
lirplanes Treated to Destro) Hitchhiking Beetles 
Aj3 pari of the broad campaign to prevent spread of the beetle by 
airplane, more than 3,000 residual DDT plane treatments were applied 
at •"> I airfields. Some 12,000 aerosol applications were made in planes 
at 52 fields. Cooperative I>IM" foliage treatments at 22 military and 
commercial airfi< Ids totaled I s . More than 2,000 beet lea were removed 
from passengers' baggage and clothing at 7 airfields. In addition, 
1,135,000 beetles were taken in traps operated at \J. airfields in the 
infested area. 
Cooperative Bureau, military and commercial airline tests to de- 
velop suitable aerosol -pace treatments to kill the Japai tie in 
airplanes was advanced this spring by the use of a new type of con- 
er. This is filled with the regular DDT-pyrethrum and is fitted 
with special valves. The container is nonrefillable and more economi- 
cal than those previously used. A quantity of such containera was 
obtained from a commercial filling company on an experimental I 
Huge Quantities of Plant Material Certified 
During L951 there were moved under quarantine certification to all 
parts of the United States and Canada approximately L42 
plant-. L,300, » pounds of soil, 250 refrigerator carloads and 
truckloadsof fresh fruits and veg 'table . The est imated value of these 
items i- approximately $15,000,000. 
Extensive Foliage and Soil Treatments at Isolated Infestations 
l)i ring tin' spring of L952 cooperative State-Federal -oil fol 
treatments were applied to seven beetle collection location- outside of 
Federal regulated area- in Georgia, [llinois, Indiana. Kentucky, and 
West Virginia. One hundred and twenty-three acres were surface 
soil treated with chlordane in five localities in West Virginia a- a pari 
of the State's Japanese beet le retardation program. 
Japanese Beetle Soil Treatments Effective for Man\ ^ ears 
The studies of numerous materials for controlling grubs of the 
Japanese beetle in the soil have been continued in the laboratory at 
Moorestown, N. -I. Toxaphene was found to compare very favorably 
with DDT for the control of Japanese beet le grubs in turf. A.n ap 
plication of this material at the rate of 25 pound- per a ere in 1947 was 
found to he -till effective in eliminating grubs in L951. During tin 4 
same period TDE lias been consistently If- effective than DDT. Pre 
liminary laboratory tests ^\' lindane gave inconsistent results. Hep 
(achlor, 2 pound- an acre, compared favorably with dieldrin and 
chlordane at the rate of :'• and l" pounds an acre, respectively, in 
killing grubs in -oil. Endrin was equivalent to dieldrin in toxicity 
;. Japa ' • beetle grubs, while isodrin was much more toxic than 
dieldrin. 
A i pear study of the effect of DDT in the soil upon the gro\* th of 
• ■i.i . rye, soybeans, and corn, concluded in 1951, showed that 1 > I > 1 
i |, I., <;o pound- per acre had no deleterious effect on the grass or the 
