viii Contents 



CHAPTER XXXI 



PAGES 



Pollination 282-307 



Something new — Historical — Self-sterility — Causes of 

 self-sterility — Defective pistils — Insufficient pollen — 

 Difference in time of maturity between stigma and 

 pollen — Impotency of pollen — Conclusions — Choosing 

 varieties for pollination — Blossoming seasons — Blos- 

 soming chart — Mutual affinities — Various groups con- 

 sidered — Amount of pollen produced — Fruiting value 

 — Specific recommendations — Table of pollenizers — 

 The Domesticas and the Damsons — Agencies of polli- 

 nation — The June drop — Practical conclusion. 



CHAPTER XXXII 



Geography and Climatology .... 308-316 

 The relationship of the plant to its environment — 

 Hardiness — Differences in hardiness of plums — Spe- 

 cial investigations — Hardiness of representative va- 

 rieties — Maps — Lombard and Bradshaw — Ihe Dam- 

 sons — Burbank and Kelsey — The Americana group — 

 The Nigra group — The Wildgoose group — The Miner 

 group — The Wayland group — The Chicasaw group—- 

 Commercial range: The Domesticas — The Ameri- 

 canas — The Wildgoose varieties — Local peculiarities 

 — Phenology: Blossoming and ripening seasons- 

 Differences in different localities. 



CHAPTER XXXIII 



Diseases of the Plum 317-337 



Those of parasitic origin: Fruit rot — Black knot — 

 Shot hole — Plum pockets — Scab — Rust — Fly-speck — 

 Phoma — Powdery mildew — Lichens — Of Non-para- 

 sitic origin : Gummosis — Sunscald — Leaf curl — 

 Single-tree disease. 



C f APTER XXXIV 



Insect and Other Enemies of the Plum . . 338-348 

 Curculio — Gouger — Aphis — Scale — Borers — Tent cat- 

 erpillar — Canker worm — Bud moth — Red spider — 

 Bumble flower beetle — Other insects — Mice. 



CHAPTER XXXV 



Cooking Plums m . # 349-357 



The culinary usefulness of plums — Stewing — Canning 

 — Preserves — Spiced plums — Pickled plums — Jelly — 

 Plum juice — Marmalade, jam, or plum butter — Dry- 

 ing — Uncooked plums. 



