viii CONTENTS 



CHAPTER IV HOW TO RAISE A FRUIT TREE 



PAGE 



Section 22. Grafting 83 



23. Budding 86 



24. Planting and pruning 88 



CHAPTER V THE DISEASES OF PLANTS 



Section 25. The cause and nature of plant disease . . 94 



26. Yeast and bacteria 100 



27. Prevention of plant diseases . . . .102 



28. Some special plant diseases . . . .103 



Fire blight of the pear and apple . .103 



Oat and wheat smuts . . . .107 



The potato scab . . . . .109 



Late potato blight . . . . . 1 1 1 



The club root . . . . . .114 



The black knot . . . . .114 



The peach curl . . . . . 1 1 5 



The cotton wilt 115 



The fruit mold .116 



CHAPTER VI ORCHARD, GARDEN, AND FIELD 

 INSECTS 



Section 29. Insects in general 118 



30. Orchard insects : San Josd scale ; codling 



moth ; plum curculio ; grape phylloxera ; 

 cankerworm ; apple-tree tent caterpillar ; 

 pear-tree girdler; peach borer . . .126 



31. Garden and field insects: cabbage worm; 



chinch bug; plant louse ; squash bug ; flea- 

 beetle ; weevil ; Hessian fly ; potato beetle ; 

 tobacco worm . . . . . .140 



