CONTENTS 



Page 



Introduction 3 



Care during and after har- 

 vest 3 



Effect of removing spray- 

 residue 7 



Common names of diseases. 7 



Apples 7 



Alternaria rot 7 



Ammonia injury 9 



Apple maggot injury 9 



Apple-cedar and quince rusts 10 



Bitter pit 11 



Bitter rot 13 



Black rot 14 



Blotch 15 



Blue mold rot 16 



Box-wood scald 18 



Brown core and internal 



browning 18 



Brown rot 20 



Bruises 21 



Bull's-eye rot 22 



Chemical injuries 23 



Codling moth injury 26 



Core rot 27 



Cork (boron-deficiency cork) 27 



Drought spot 29 



Fisheye rot 29 



Flyspeck 30 



Freezing injury 30 



Fruit spot 34 



Gray mold rot 35 



Hail injury 36 



Heat injury 37 



Honeydew and sooty mold 37 



Internal break-down 37 



Internal browning 38 



Jonathan spot 38 



King David spot 39 



Leaf hopper specking 39 



Leaf roller and green fruit- 

 worm injury 39 



Miscellaneous rots 40 



Pansy spot 40 



Pear leaf blister mite injury 41 



Phytophthora rot 41 



Pink mold rot 42 



Plum curculio injury 42 



Powdery mildew 43 



Quince rust 44 



Red spots 44 



Rhizopus rot . 44 



2 



Page 



San Jose scale injury 44 



Scab 45 



Scald 47 



Side rot 48 



Skin and flesh cracking 49 



Soft scald 51 



Soggy break-down 51 



Sooty blotch 52 



Spongy dry rot 52 



Spray injury 53 



Stigmonose (insect punc- 

 tures) 54 



Sunburn, sunscald, and de- 

 layed sunscald 55 



Washing injuries 55 



Water core 55 



Pears 56 



Ammonia injury 56 



Black end 57 



Black rot 58 



Black spot 58 



Blue mold rot 58 



Brown rot 58 



Bruising 58 



Bull's-eye rot 58 



Core break-down 58 



Freezing injury 59 



Gray mold rot 59 



Pear leaf blister mite in- 

 jury 60 



Pear psylla injury 61 



Pink mold rot 61 



Powdery mildew 61 



Rhizopus rot 61 



San Jose scale injury 61 



Scab 61 



Scald 62 



Side rot 62 



Silicate injury 63 



Sooty blotch 63 



Spray injury 63 



Stigmonose (insect punc- 

 tures) 63 



Stony pit, corky spot, and 



boron-deficiency pitting 63 



Quinces 65 



Black rot 65 



Black spot 65 



Blue mold rot 65 



Brown rot 65 



Oriental fruit moth injury 65 



Literature cited -- 66 



