CONTENTS. 
Cause and symptoms 
Means of spread and entrance...... ..... 2.022222 002020 cece eee eee 9 
The control of the:disease. 2. 32s. .o/dscijes 22s sooneuisuneay pec cc cee Geren 10 
Elimination and quarantine... . 22.72.20. 0.000.0 Joleen ee 10 
Fundamental observations and experiments...................--.... 10 
Fhegal Consid erations 23: os:9.2.a5e0-< 2 acc anteacnaaiee ne eects Shale een aaeiaiens 1 
The method in detail. .............. 0.0. .0020 2222202200222 2 cece eee 12 
Locating advance infections (‘‘scouting”)........-...-.---..--- 12 
Destroying advance infections..............2.2.-2-2-2-222-2--6-- 13 
Establishing the ‘‘immune zone” ...........-.---.-2-0.2-2-2++-- 13 
Quarantine: oes aie he ve a 2 Wchava sn fan ei oa aes alan chelate sca 14 
Program for the second year..........-.-----+--2---22++ee-eee ee 14 
The example of Pennsylvania.................-2-2.2-22-02 2-2-2222 e eee 14 
Inspection of diseased nursery stock...............2.0-020022-2-0 22 eee 17 
Individual treatment of diseased trees............-.-.2----02-222 22-222 ee 18 
Advice to chestnut orchardists.......-.......--.-2-2--2- 2-2-2222 e eee 20 
Advice to owners of chestnut woodland.................-----2---------- 20 
Advice to owners of ornamental chestnut trees. .........-..------------- 21 
Advancing popular knowledge of the disease........-. ee reer 22 
Cooperation of the Department of Agriculture.......--..---..-------- 22 
Public cooperation.....-.........- 2.202022 - 22 eee eee eee ee ee eee 23 
The protection of the Southern States...........---------------+--------- 23 
Summary. ..-..-.-----2 22-222 e eee eee tte eee eee 23 
Page. 
Fig. 1. Map showing the present known distribution of the chestnut bark 
. SGISCA8E so saeeeie ces meee saree e a teclecewoe es eer ees e Rees 6 
2. Large chestnut trée partly killed by the bark disease.......----.----- 7 
3. Diseased chestnut bark showing pustules and form of discharge of sum- 
mer spores in damp weather... ..--.-------++--22-+2rtcrrrtttite 7 
4. Dead chestnut bark showing pustules of the parasitic fungus bearing 
winter spores......-.----- sti ipo 4 ae OMe ees wage Tes 8 
467 
