20 FUXGI AND FUXGICIDES 



Sulphur. — Flowers of sulphur form a valuable 

 fungicide to use against various mildews and other dis- 

 eases. The powder may be applied directly to the sur- 

 face of the plants to be protected, or used as a wash, or 

 in fumes. 



COMBIXIXG FUJ^GICIDES WITH IXSECTICIDES 



It is often desirable, in applying the fungicides 

 used in spraying, to combine with them certain insecti- 

 cides, to destroy insects attacking the crop at the same 

 time. The advantasres of this, in savinof time and ex- 

 pense, are obvious. The following two combinations 

 have been found practicable : 



Bordeaux Mixture and Arsenites. — Add four 

 ounces of London purple or Paris green to fifty gallons 

 of Bordeaux mixture. This is one of the very best 

 combined insecticides and fungicides. It can be used 

 safely and effectively upon a great variety of crops — 

 such as potatoes, for Colorado beetles and blight ; apples 

 and pears, for insects and scab ; and plums and peaches, 

 for curculio and leaf or fruit diseases. To use upon 

 fruits the Green formula is probably the best, as too 

 large an amount of copper sulphate occasionally prevents 

 the perfect development of apples and pears. The 

 remarks on page 16, concerning late applications of 

 the Bordeaux mixture, are equally applicable to this 

 combination. 



Copper Arsenic Solution. — The Ohio Experi- 

 ment Station recommends the following combination : 

 Copper carbonate, six ounces ; Paris green, four ounces ; 

 ammonia, two quarts; lime water, fifty gallons. "The 

 cop23er carbonate and Paris green may be mixed and dis- 

 solved in the ammonia (more or less ammonia wall be 

 required, according to the strength), after which add 

 the lime water. By lime w^ater is here meant clear lime 

 water made by dissolving as much lime in water as it 



