blight ; Chinese chestnut as a class in the more resistant and the 
hardier of the two. Fortunately, these two Asiatic chestnuts are 
also very resistant to ink disease. Japanese chestnut has been 
introduced into Europe in many places because of its resistance 
to root disease. Because of the spread of blight in Europe, these 
old Japanese chestnut introductions and their hybrids are receiving 
increased attention, even though Japanese chestnut lacks some of 
the desirable qualities of European chestnut. 
33. It is recommended that each country interested in chestnut 
make a survey of its introduced Asiatic chestnuts. Arboretums 
and botanical gardens are easily checked, and usually they have 
good records as to the source of their plants. Private gardens, 
estates, and horticulturists sometimes have Asiatic chestnuts 
unrecorded by chestnut workers. Some of these may be very desi- 
rable in a planting of bredding program. Even if they are not 
growing well, some of their progeny may have more value under 
different soil and climatic conditions. In a breeding and propagation 
program, it is quite an advantage to have seed and scion wood 
easily obtainable. 
34. It would be valuable to have records on Asiatic chestnuts 
of known origin listed for the possible use of European breeders. 
Collections of the best material of known origin, or of demonstrated 
outstanding value, should be assembled at several European 
locations with different climatic conditions. 
35. In France there are more old Asiatic chestnuts and their 
hybrids than in any other European country, and more breeding 
work has been done there. Most of these Asiatic chestnuts are of 
the Japanese species. At Brive, France, there is a very fine 
collection of Asiatic chestnuts, grown from seed that the United 
States Department of Agriculture Division of Forest Pathology 
sent to Dr. J. Dufrenoy in the spring of 1929. It is my understanding 
that the records on these trees have been lost. The material sent 
to Dr. Dufrenoy included seed from many different parts of Japan 
and Korea, as well as some from China. It should be valuable for 
testing under different conditions even though the parentage is 
unknown. Nuts from this orchard planting will be hybrids between 
many different strains and selections from different parts of Asia, 
and among the progeny tested in different parts of Europe there may 
be some valuable material adapted to local conditions. There are 
also in France a considerable number of hybrids between European 
and other Japanese chestnuts. The seedlings of some of these 
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