No. 1,] Remedies for plant diseases. u 



REMEDIES FOR PLANT DISEASES. 



[The following are some reliable formulse for the treatment of fungi and 

 insect pests. They have been taken from the Report of the Agriculturoi Experi- 

 ment Station of the University of California, and are reprinted here for the 

 benefit of the many inquirers in this country to whom the original reports are not, 

 perhaps, accessible. It should be very constantly borne in mind that " Paris 

 Green " and " London Purple " contain the powerful poison arsenic, and should 

 therefore be used with the greatest caution, especially in the case of plants any 

 part of which is used in the preparation of food or drink. The same caution 

 applies, though with less emphasis, to *' Bordeaux mixture," which contains an 

 irritant copper salt.] 



For powdery MILDEWS use SULPHUR, dusting it on the 

 plants. 



For fungi in general use BORDEAUX MIXTURE, made as 

 follows : For every lo gallons take i pound of lime and i pound of 

 bluestone. Dissolve these separately in hot water and mix when 

 cool, adding the rest of the water. Spray on the plants. Or spray 

 with AMMONIACAL COPPER CARBONATE SOLUTION, made 

 as follows : Dissolve i ounce of copper carbonate in 6 ounces of 

 ammonia and add lo gallons of water. 



For FUNGI and SCALE INSECTS use LIME, SALT AND 

 SULPHUR MIXTURE, a winter wash composed of lime 8 pounds, 

 salt 3 pounds, and sulphur 4 pounds, for each 12 gallons of water. 

 Mix one-fourth of the water, one-fourth of the lime, and all the sul- 

 phur, and boil for one and a half hours ; put the salt with the rest of 

 the lime and slake with hot water ; add to the above and boil half 

 an hour longer ; add the remainder of the water and apply as a spray. 



For SCALE INSECTS use RESIN SOAP as follows: For 

 100 gallons for summer use take resin 18 pounds, caustic soda 

 (98%) 2>\ pounds, and fish oil 2\ pints ; for "winter use, resin 30 

 pounds, caustic soda 65 pounds, and fish oil 4^ pints. The material 

 is put in a kettle and covered with four or five inches of water. 

 The lid is put on and the mixture boiled two hours or more, and then 

 the rest of the water is added, a little at a time. Spray on the plants. 

 Or use the GAS TREATMENT: Cover the plant with an oiled 

 tent, and for each 100 cubic feet of contents place in a bowl beneath 

 the tent § ounce of water, \ ounce of sulphuric acid (oil of vitriol), 

 and \ ounce of potassium cyanide (58°/q). Be careful not to inhale 

 the poisonous gas, not to allow it to escape from the tent for half 



