EXPERIMENT STATION BULLETINS. 



375 



jyart to 1000 of water. This solution, already prepared, cau be obtaiued 

 from tbe druggist at about 10 cents a pint. It cau be made by dissolv- 

 ing 4 small (or one large) corrosive sublimate antiseptic tablets in a 

 pint of water. Corrosive suhlimate is deadly poison. It must not le 

 used ill metal dishes. Keep tJic solution or the tahlets out of the reach 

 of children. Corrosive sublimate may cut down germination slightly. 



Spores are usually dead on seed two 

 or three years old. The use of old 

 seed of good germin'ating power is to 

 he advised. 



Irrigate the seed heds by gently 

 flooding or place tile for the sub-irriga- 

 tion. Do not icater heavily. 



If land enough is available, rotate 

 crops. This method is best for the 

 land, keeps down weeds, and is the 



ki^:eiS& 



-2" TILES 





IRRl&flTIOM DITCHES 



Fig. 5. Diagram of greenhouse showing at 

 left 2-inch tiles placed for sub-irriga- 

 tion, and at right two small ditch- 

 es through which water can 

 be flooded. 



cheapest and best way to fight all cel- 

 ery diseases. Tut new, clean soil in 

 the greenhouse — don't use old celery 

 soil". Uolaic the seed hed. but do not 



l>ut it Avhere celery stood the year before. Do not mulch the seed bed 



with old celery tops. Leave no celery trash about in the seed beds. 

 Cultivate the dirt (uray from young celery plaiit.^ so as to expose the 



crown. Tills allows tlie leaves to spread and helps to keep the heart 



leaves clean. 



//////MB./ ij h/ 



mil!!!!" 





Fig. 6. Right way to cultivate: Dirt thrown 

 away from plant, crown exposed. The 

 drip from the leaves does not fall 

 into the heart. 





Fig. 7. Wrong way to cultivate: Dirt 



banked up on young plant. The drip 



from the leaves falls on the 



young heart leaves. 



Do not ivork plants while the dew is on or directly after a rain. To 

 do this carries the fungus along the row on the cultivator or on the 

 worker's clothes. 



Drain the land well. Keep the ditches clean. Do not locate celery 

 fields in hollows or in jjlaces surrounded by trees or buildings. Do not 

 pile boards so as to shelter the rows from the wind. Ycntilation is essen- 

 tial for quick drying. 



*01d greenhouse soil can be made safe by steam sterilizing. Chemicals to drench the soil may also 

 be used. Use formaldehyde 1 gallon to 50 gallons water. Pour on as much as the soil will hold 

 (about a gallon to the square foot). Stir the soil thoroughly as the chemical is applied. Cover with 

 paper or canvas over night. Then work the soil each day till it dries and the fumes escape. From 

 three days to a week will be necessary to get the soil into shape. All boards, path.'?, tools, etc., must 

 also be drenched with the disinfectant. This treatment of grcenhovac f^oit, is nimcd more al soil dis- 

 eases than at leaf diseases. Two gallons formaldehyde (cost $2.00) will treat 100 square feet. , 



