450 Journal op the Department op Agriculture. 



inclies. This was distributed over eleven days, but most of it fell 

 as heavy showers on three days. 



Washes as listed were applied on 17th Septeraber, 1920 : — 



1. Plain limewash. 



2. One part sulphur, one part lime, and one part tobacco dusty 



in thin glue. 



3. Two parts sulphur, two parts lime, one part tobacco dust,. 



in thin glue. 



4. 1 lb. sulphur, 1 pint tobacco dust, and 1 lb. hard soap, iifc 



1 gallon of water. 



5. 1 lb. sulphur, 1 pint tobacco dust, 1 lb. soap, and 1 lb.. 



lime, in 1 gallon of water. 



On 25th September the following were added to the test : — 



6. One part portland cement and one part sulphur, in sour 



skimmed milk. 



7. One part portland cement, one part sulphur, and one part. 



lime, in sour skimmed milk. 



No rain fell until November, but by that time the limewash had 

 peeled off the trees. The other washes withstood the November rains, 

 consisting of six light showers, two of nearly one-half inch each, and 

 two rains of 1.07 and 1.42 inclies respectively, making a total of 4.02 

 inches. In December only 1.62 inches of rain fell, distributed over 

 nine days. 



In January, 1920, there were four days on which rain fell in 

 amounts ranging from .46 to 1.31 inches, besides eight other days on^ 

 which light showers occurred, making a total of 4.05 inches of rain- 

 fall for the month. The January rain washed away the mixtures 

 prepared with glue, and injured the others. 



In February there were six light showers, four ranging in amount 

 from approximately one-half to one inch each, besides one heavy 

 downpour in which 4.18 inches fell, most of it within a couple of 

 hours. The total rainfall for the month was 7.98 inches. The 

 February rains practically completed the work of the January ones, 

 as at the end of the month very little except traces of the washes 

 remained. Following the glue mixtures, Nos. 4 and 5 were the first 

 to go, then 6, and finally 7. 



No injury from any of the washes could be seen, except in one 

 case when the mixtures 4 and 5 were boiled. The alkali of the soap 

 evidently united with some of the sulphur, with the result that the 

 washes injured leaves and tender young shoots. When there v/as no 

 boiling, there was no injury. As regards the glue, it was used at the 

 rate of 1 lb. in 4 gallons of water. It would probably be better to 

 use a stronger mixture. 



Conclusions from E^perimejits. — The washes used the third year 

 M'ere the only ones of much value. It is not always safe to form. 

 definite conclusions from one season's results ; but, as the washes 

 appeared- to be perfectly safe, and as they withstood a much greater- 

 amount of rain than falls during the period when trees are liable- 



