FORTIETH ANNUAL REPORT. 



115 



GENERAL TREATMENT FOR RASPBERRIES, BLACKBERRIES 



AND DEWBERRIES. 



When to Spray. 



Orange rust, deter- 

 mined by the bright, 

 orange color on the un- 

 der side of the leaves. 



Anthracnose, grayish 

 spots on the canes and 

 leaves. 



"Worms" or "slugs.' 



What to Use and What For. 



No method of preventing. Dig the plant as soon 

 as discovered and burn. 



Cut out and burn all canes after fruiting. Spray- 

 ing may check the disease, but may not be profit- 

 able. If desirable, make first spraying when new 

 canes are 6 to 8 inches high, and repeat twice about 

 2 weeks apart. Do not set diseased young plants. 



Cut cut and burn borers in stem, gouty galls, and 

 tree-cricket eggs. 



Spray with an arsenical if fruit is just set, later 

 use hellebore or pyrethrum. 



GENERAL TREATMENT FOR STRAWBERRIES. 



When to Spray. 

 Young plantations. 



Fruiting plantations. 



What to Use and What For. 



Before setting the young plants, pick off all dis- 

 eased leaves and if root-lice are suspected, dip in 

 strong tobacco-water. After growth starts spray with 

 bordeaux, for leaf-spot and poison for leaf-curler, if 

 present. 



Spray with bordeaux before blossoming and re- 

 peat 10 days or 2 weeks later. After fruiting, mow 

 and burn over, if plantation is to be fruited again. 

 If leaf-rollers have been present, spray with an 

 arsenical after growth has started again, but before 

 leaves curl. 



For strawberry root-lice, see bulletin 244, page 88. 



GENERAL TREATMENT FOR POTATOES. 



When to Spray. 

 For scab. 



What to Use and What For. 



Soak the uncut tubers for two hours in 30 gal- 

 lons of water and one pint of formalin (can be se- 

 cured of any druggist). This solution can be used 

 several times. Do not put treated tubers back into 

 crates or bags that held scabby potatoes. Make the 

 treatment only a few days before planting if pos- 

 sible. Do not plant upon land that has recently 

 grown crops of scabby potatoes or beets. 



