viii Contents 



PAGES 



Foot-rot 158-159 



Root-rot . . . 159-160 



Black-rot (black-shank) 160-162 



Scurf (soil-stain, rust, Jersey mark) 162-163 



Leaf-blight .... 163 



Leaf-spot 163-164 



White-rust (leaf-mold) 164 



Soft-rot . . 165 



Ring-rot . 165-166 



Dry-rot . . . 166 



Java black-rot ... .... ... 166 



Charcoal-rot ... 167 



Control of storage rots . . . . . . . 167-169 



CHAPTER IX 



Insecticides, Fungicides and Spbat Machineby 170-176 



Insecticides and fungicides . . 170-173 



Spray machinery . . ... 174-176 



Dusters ... 175-176 



Nozzles, hose, and fixtures . 176 



CHAPTER X 



Harvesting and Storage 177-206 



Storage 179-206 



Essentials in keeping sweet potatoes 180-184 



Advantages of the storage-house over the bank . 185-189 



Construction of the storage-house . . . 189-198 



Operation of the storage-house . . . . . 198-201 



Outbuildings for storage-houses 201-202 



Commercial curing-houses . . ... 202-203 



Banking ... • • ; 203-206 



CHAPTER XI 



Preparation for Market 207-237 



Market requirements 207-221 



Varieties . . . : . . . . . 208-210 



Selling period .... 210-212 



Containers . . .... . 212-221 



Proper production . . ... 221-226 



Quality . ... . 222-223 



Grading . 223-225 



Quantity . . . 225-226 



Storage .... . . . . 226 



Packing operations ... 226-229 



