1-L(j JOURNAL OF AGBICULTUEE OF P. E. 



Compatibilities. 



It is very often (lesiriil)le to eoml)ine other materials with the 

 lime-sulphur, especially poison for biting insects. This permits of 

 a saving of time and consequently of money. Lead arsenate (neu- 

 tral) may be used in this manner without any fear of injuries result- 

 ing, although it does produce a chemical change in the lime-sulphur 

 which shows as a darkening of the solution. As a matter of fact, 

 the addition of the arsenate, actually increases the fungicidal value 

 of the sulphur. 



Substances other than the lead arsenate should be used with 

 extreme caution. Those of an acid nature — Paris green, for exam- 

 pi — are dangerous, and even an acid lead arsenate shoidd be avoided. 

 Lime-sulphur and soap form an inefficient but non-injurious com- 

 bination. Sulphur and oil emulsions are dangerous if used together, 

 the emulsion being destroyed and free oil liberated. 



DISINFECTANTS. 



For disinfecting field crates, pruning instruments, and other equip- 

 ment, the following may be used: 



Copper sulphate. — Used as a solution made up at the rate of 

 four pounds of copper to one hundred gallons of water. 



Corrosive suhlimate {mercuric hichloride) . — Used in solution at 

 the rate of one part of the poison to a thousand of water. The most 

 satisfactory method of obtaining this substance is in the form of tab- 

 lets to be purchased at most drug stores. A tablet in a pint of water 

 gives a solution of the desired strength. 



Formaldehyde. — Formaldehyde or formalin is purchased in liq- 

 uid form, forty per cent strength. For disinfecting purposes one 

 part of this s;tock is to be added to ninety of water. 



APPENDIX II. 

 CITRUS FUNGI. 



A considerable number of fungi have been collected on the leaves, 

 fruits, twigs, and other parts of the different citrus species. A list 

 is given here to afford some idea of the prevalence and distribution 

 of the various forms determined. 



A.fpcrfjillv.'i flavtui Link, frreen mold on rotting frnit, generally secondary. Not 



common. 

 Aspergillus niger Van Tiegh. Black mold on rotting fruit, generally secondary. 



Not common. 



