APPLE RUST 



201 



Spraying with Bordeaux mixture is considered to be a partial 

 remedy for this disease. There is evidence that rich soils will 

 cause fruits to suffer from bitter rot worse than where the trees 

 are partially starved. 



Apple Canker. — This form of attack is noticed on the large 

 twigs and main branches, and 

 sometimes on the trunk of trees. 

 The best remedy is to scrape 

 away and thoroughly cleanse the 

 diseased parts. Wash with cop- 

 per sulfate solution. Spraying 

 thoroughly with lime-sulfur is 

 believed to be helpful. Scraping 

 and cleaning, however, should 

 always precede the washing with 

 antiseptics. 



Sun Scald. — The appearance 

 of sun scald is somewhat similar 

 to the canker disease. The bark 

 on the main parts dies and peels 

 from an attack of sun scald. 

 Scraping clean and washing with 

 antiseptics are recommended. 



In setting young trees care 

 should be exercised to allow their 

 own growth to shade their trunks. 

 Trees are sometimes severely at- 

 tacked by sun scald after a winter 



With much SnOW. It IS Supposed scab holds this disease in check. (Virginia 



that the reflection of the sun from 



the surface of the snow will blister the bark so openly exposed at 

 that season of the year. Tying the trunks with paper will pro- 

 tect them in the winter as well as in the summer. This method 

 may be easily practiced in the home orchard. 



Apple rust is a fungous disease which seriously attacks the 

 leaves, twigs and young fruits of pears and apples. The fungus 

 has an alternate generation in the form. of a fleshy growth on cedar 

 trees, known as the cedar apple (Figs. 125 and 126). 



A remedy for the disease is to cut down all cedar trees in the 

 vicinity of the orchard. Spraying with lime-sulfur or Bordeaux 

 mixture, as for scab will aid in controlling the rust. 



Fig. 127. 

 apple leaf. 



Frog-eye leaf spot disease on 

 The usual spraying to prevent 



