EXPERIMENT STATION BULLETINS. 



325 



GENERAL TREATMENT FOR GRAPES. 



When to Spray. 



When the shoots are 

 about 8 to 10 inches 

 long. 



Just before blooming. 



Just as the blossoms 

 fall. 



About 10 days or 2 

 weeks later. 



What to Use and What For. 

 Bordeaux mixture for black-rot. 



Bordeaux mixture for black-rot, with poison for 

 the grape-berry moth and rose-chafer. 



Same as before. 



Bordeaux mixture and poison for black-rot and 

 berry-moth. The need for this spraying depends upon 

 the weather conditions and the amount of rot preva- 

 lent in the vineyard. If it is thought advisable to 

 make later sprayings, some material should be used 

 that will not stain the fruit. 



In vineyards where flea-beetles appear, Bordeaux 

 and a strong arsenical poison just before the buds 

 burst. 



In vineyards where the grape-berry moth is seri- 

 ous, spray with Bordeaux and an arsenical poison 

 during the middle of July, before the 20th. 



For leaf-hoppers (sometimes, but incorrectly, called 

 "thrip") tobacco-water or kerosene-emulsion while 

 the insects are young. (Burning rubbish late in the 

 fall will destroy many hibernating leaf -hoppers.) 



GENERAL TREATMENT FOR CURRANTS AND GOOSEBERRIES. 



When to Spray. 

 Before growth starts. 



Just as the leaves are 

 expanding, if worms ap- 

 pear. 



What to Use and What For. 



Lime-sulphur wash for San Jose scale or European 

 fruit scale, if present. Cut out and burn wilted and 

 hollow canes containing borers. 



Bordeaux mixture and poison, % pound of Paris 

 green or 2 pounds of arsenate of lead, to 50 gal- 

 lons. Repeat If worms reappear before fruit is % 

 grown, if later, then use pyrethrum or hellebore. 



If leaf-bugs or aphids appear, spray with tobacco- 

 water or kerosene-emulsion while the bugs are red 

 and wingless, and before leaves become curled. 



Gooseberry-mildew. Where this disease is known 

 to be serious, begin from the time the buds start and 

 spray with potassium-sulphide, 1 oz. to 2 gallons of 

 water, and repeat about every 10 days. 



