1974 



ENCYCLOPEDIA OP PRACTICAL HORTICULTURE 



Black Rot. See Blossom End Rot, this 

 section. 



Blight 



^ Bacillus solanacearum Smith 



This disease has caused considerable 

 injury South. E. F. Smith has fully de- 

 scribed the disease and recommended as 

 precautions against it an early and com- 

 plete destruction of insect pests, and the 

 removal of any diseased vines. He also 

 advises the use of land on which there 

 have been no diseased plants, together 

 with seed taken from localities where 

 the disease has not existed. 



J. S. Robinson found that by spraying 

 plants affected with this blight three or 

 four times in the summer with Bordeaux 

 an increased yield of two to two and one- 

 half tons per acre was obtained. 



See also Downy Mildew. 



G. E. Stone, 

 Massachusetts Bulletin 138. 



^ Blossom-End Rot— Point Rot 



P. D. Bailey 



This disease is quite generally distrib- 

 uted throughout the country. It seldom 

 causes extensive loss, but from the fact 

 that it is more serious on the early crop, 

 the financial loss becomes a factor of 

 importance. 



This rot may occur at various stages 

 of development of the fruit, generally 

 before it has reached full size, and, as 

 has been stated, early in the season. It 

 makes its appearance at the blossom end 

 in the form of sunken brown spots which 

 gradually enlarge. Such spots are dry 

 and hard. Many times molds or bacteria 

 gain entrance at this point when the fruit 

 is imperfect and cause decay. Such 

 troubles should not be confused with the 

 one under consideration, although they 

 frequently follow it. 



Pig. 1. Blossom-End Rot of Tomato. 



Early stage, late stage and cross-section. 



— Georgia Experiment Station. 



