35° 



APPLE. 

 Commonly known among growers as "the fungus." Usually 

 Scab. most evident on the fruit. Spray with Bordeaux 5-5-50 or 



3_3_5o; first, just before the blossoms open; second, just 

 as the blossoms fall; third, 10 to 14 

 days after the blossoms fall. The second 

 spraying seems to be the most important. 

 Spray thoroughly. For the use of insect 

 poisons with Bordeaux mixture, see codling- 

 moth and BUD-MOTH. See also Cornell Bulle- 

 tins 84 and 226. (Pig. 163.) 



This is the same as Pear 

 Fire-blight, blight. It usually makes 

 itself manifest on the apple 

 trees in three forms, blossom blight, twig 

 blight, and blight cankers on limbs and body 

 (Pig. 164). This disease is caused by bac- 

 teria which are distributed by bees and flies 

 and is not controlled by spraying. Cutting 

 out and destroying the diseased parts are the 

 chief measures to be taken. Cut out blighted 

 twigs in young trees as fast as they appear, 

 carried over winter in cankers on the main limbs and bodies of the trees. Remove 

 all such cankers with sharp knife cutting well into the healthy bark and wash 

 the wound with corrosive sublimate, i part to 

 1000 of water. Then paint the wound with heavy 

 lead oil paint. See Cornell Bulletin, 236. Destroy 

 or clean up all old pear and apple trees about the 

 premises because such trees harbor the disease. 



This important fungous disease 



New York should not be confused with the 



apple-tree "blight canker." Cankers are 



canker, usually found on the main limbs 



of old trees, black and rough 



(Pig. 165). Canker is very common on Twenty 



Ounce. Since^the fungus enters through wounds, 



avoid breaking the bark.' All wounds made in 



pruning should be promptly painted over. Cut 



out cankers and treat as for "blight cankers." 



Spray early in spring before the buds start with 



Bordeaux, 10-10-50, or soak the body and the limbs when making first'applica- 



tion for scab. See Geneva Bulletins 163 and 185. 



Fig. 162. Alfalfa leaf-spot. 

 The bacteria of this disease are 



Fig. 163. Apple-scab. 



ASPARAGUS. 



The most common and destructive disease of asparagus rust 



Rust. produces reddish or black pustules on the stems and branches. 



Late in the fall, bum all afEected plants. Fertilize liberally and 



cultivate thoroughly. During the cutting season, permit no plants to mature and 



