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Crilley (105) on September 23,' 1936, advised that Peruvian 
cube stocks at Iquitos, Peru, were low. 
"Several sources state that exploitation has de- 
creased in consequence of the low-prevailing prices for 
cube in the New York and European markets. Another reason 
for reduced stocks is that old cube plantations are about 
exhausted and new plantings will not begin to produce until 
next year. 
"Exporters of cube in Iquitos frequently guarantee 
a rotenone content not less than 5 percent. In many cases 
shipments have contained from 5 to 8 percent while in others 
the range has been from 3-1/2 percent to 11 percent rotenone 
content. One Iquitos firm states that for some time it has 
been selling its entire production exclusively to European 
consumers, but at present it can only supply "5 tons monthly 
at 3 cents gold per lb. C. I. F. New York per unit of rotenone 
content, without limit, on weight at time of unloading, which 
is the price obtained in Europe." 
Schraud (369), American Vice Consul at Puerto Cortes, Honduras, 
in 1936 reported that a firm in San Pedro Sula is of the opinion 
that cube root and other rotenone-bearing plants grown in Honduras 
can be exported to the United States. 
Crilley (102), U. S. Department of Commerce, Bureau of Foreign 
and Domestic Commerce, reported on December 23, 1936, that Peruvian 
cube production may be curtailed. 
Cube planters in the Iquitos district have decided to limit 
root extraction until the local price increases to 60 centavos per 
kilo, according to reports received in Lima. It is also said that 
further plantings might not be made. Planters claim American users of 
rotenone pay 20 cents U. S. Cy. per pound for cube of 8 percent 
content or 2.5 cents U. S. Cy. for each one percent rotenone, which 
does not justify the low prices of 40 to 50 centavos per kilo paid to 
planters by cube buyers in Iquitos. One editorial in a Lima paper 
advocated Government intervention in regulating cube prices and suggest- 
ed the establishment of a chemical laboratory in Iquitos to assist pro- 
ducers in ascertaining the exact rotenone content of their shipments. 
The Xoloniaal Institute of Amsterdam (251) in 1936 summarized 
recent Dutch work on the insecticidal value of derris and Lonchocarpus. 
Rotenone also occurs in the roots of various species of Lonchocarpus 
(especially Lonchocarpus nico u) . These are commonly known by their 
native names of cube (Peru), timbo (Brazil), nekoe (Surinam) (L. 
chrysophyllus ) , nicou (French Guiana), and haiari (British Guiana). 
Cube root is becoming a serious competitor of derris via the American 
market, being exported to the U. S. A. on the Amazon. Biological 
tests suggest, however, that, with the same rotenone content, derris 
is to" be preferred to cube owing to the greater activity of the non- 
rotenone components. In recent years Lonchocarpus (white and black 
