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SUMMARY 



1. There is no reaction between dilute Lime-sulphur solution and dilute 

 Nicotine solution. 



2. In the use of Nicotine compounds with dilute Lime-sulphur solution, the 

 best dilution of Lime-sulphur solution to use is one to forty. 



3. The use of acid Nicotine Compounds, as "Nico-sul" is not advisable 

 with dilute Lime-sulphur solution, because a sediment is produced composed 

 mostly of free sulphur, which decreases its value as an insecticide or fungicide 

 to that amount. 



4. If a too alkaline Nicotine Compound is used a sediment composed prin- 

 cipally of Lime (CaO) and a small amount of free sulphur is produced. 



5. To obtain the best results it is advisable to use an exactly neutral or as 

 near neutral Nicotine Compound as is obtainable; such as "Nico-fume", with 

 dilute Lime-sulphur solutions. In which case only a trace of sediment is formed. 



6. Acid Lead Arsenate cannot be used with dilute Lime-sulphur solutions. 



7. Neutral Lead Arsenate is the best to use with dilute Lime-sulphur so- 

 lution, and also to use with dilute Lime-sulphur and Nicotine Compounds for 

 the control of San Jose scale, Red Bugs, etc, with one spraying. 



8. As soft a water, as is obtainable, should be used in making up Lead Ar- 

 senate for spraying because waters high in dissolved salts, or in carbon dioxide, 

 makes proportionally more arsenic (As2 O$ ) soluble. 



9. Carbon Dioxide pressure sprayers cannot be used in the spraying of Lead 

 Arsenate, or when Lead Arsenate and dilute Lime-sulphur solution are mixed, 

 as more soluble arsenic (As2 Os ) is dissolved. 



10. To avoid soluble Arsenic in Lead Arsenate and to neutralize the acidity 

 of the Lead Arsenate in its use with the Lime-sulphur solution, use an excess 

 of milk of Lime with the mixture. It can also be used to neutralize the acid- 

 ity of Nicotine Compounds. 



1 1 . Carbon Dioxide pressure sprayers can be used safely with the dilute 

 Nicotine preparations. 



