SPRAYING 



91 



growers to use lime-sulphur spray one year and 

 soluble oil the next. In other cases where the lime- 

 sulphur is depended upon for its fungicidal proper- 

 ties, growers prefer to use it every year rather than 

 to alternate with soluble oil. 



2. An early spring treatment with fungicide. — On 

 apple, pear and plum trees, this usually means a 

 thorough drenching with plain solution of copper 

 sulphate, 5 pounds to 50 gallons of water applied 

 before the buds start. 

 The lime sulphur spray 

 has been found decid- 

 edly better for peach 

 trees, and in fact this 

 spray is coming into 

 use on other fruit also. 

 The purpose of this 

 early spring spraying 

 is to kill the fungus 

 spores adhering to the 

 trees. In many or- 

 chards this is the most 

 valuable spraying of 

 the year. 



3. In orchards where 

 a special fight is to be made against fungi, particu- 

 larly apple and pear scab, another spraying is given 

 immediately before the blossoms open. In nearly 

 all cases this treatment will be made with plain bor- 

 deaux mixture. 



4. As soon as the blossoms have fallen from the 

 trees, operations should be begun for what is actually, 

 in ordinary practice, the big treatment of the 

 year's campaign. At this time the trees should be 

 treated with bordeaux mixture combined with some 



FIG. 49 NOZZLE OF IMPROVED 



VERMOREL TYPE 



