INSECTICIDES AND EQUIPMENT FOR CONTROLLING INSECTS 41 



Table 2. — Quantities of some common insecticidal materials required for small 

 quantities of sprays, based on generally accepted formula* 



Material 



With 1 gallon of water 



Calcium arsenate... I VA tablespoonfuls 



Lead arsenate. 



Magnesium arsenate. 



Paris green 



Tartar emetic 



Derris powder (4 percent). 



Cryolite 



Hellebore 



Brown sugar.. . 

 Copper sulfate . 

 Hydrated lime- 

 Calcium casemate. 



With 3 gallons of water 



Flour | 2H tablespoonfuls. 



3 tablespoonfuls 



7 teaspoonfuls 



VA teaspoonfuls. . 

 1*4 tablespoonfuls 



1 tablespoonful... 

 5 tablespoonfuls. . 

 7 teaspoonfuls 



5 tablespoonfuls.. 



Heap 



6H teaspoonfuls. . 



6 tablespoonfuls 1 cup 



2 tablespoonfuls M cup 



11 tablespoonfuls or % cup 



9 tablespoonfuls or Yi cup 



7 tablespoonfuls 



VA tablespoonfuls 



2 ounces or 4^ tablespoonfuls. 



3 tablespoonfuls 



15 tablespoonfuls or 1 cup 



7 tablespoonfuls 



1 cup 



8 ounces or 1% cups 



6H tablespoonfuls 



cup. 



With 100 

 I 

 water 



Pounds 

 4 

 4 

 4 

 2 

 4 

 21 

 3 5 



1 All measurements are level, not heaped or rounded. 



2 These dilutions give a rotenone content of approximately 0.OC5 percent in the completed spray. For a 

 rotenone content of 0.01 percent, the quantities given should be doubled. 



3 These dilutions give a rotenone content of approximately 0.025 percent in the completed spray. 



Table 3. — Volumes of given weights of insecticidal materials, for determining 

 amounts to be used for making up small quantities of sprays or dusts 



Material 



Volume of materials 

 equal to — 



Material 



Volume of materials 

 equal to— 





1 ounce 



1 pound 



1 ounce 



1 pound 





Unit 



2 l A tablespoonfuls . 

 2,Yi tablespoonfuls. 



5 tablespoonfuls. . . 

 2% tablespoonfuls. 



6 tablespoonfuls.. . 



5 teaspoonfuls 



8 teaspoonfuls 



6 tablespoonfuls... 



4 tablespoonfuls... 



5 tablespoonfuls. .. 



3 tablespoonfuls. .. 



4 tablespoonfuls. .. 

 4H tablespoonfuls. 



Cups 

 2V 2 

 VA 

 5 



2% 

 6 



m 



2% 



6 



4 



5 



3 



4 



4H 



Magnesium arsenate.. 



Mercuric chloride 



Naphthalene 



Nicotine sulfate 



Paradichlorobenzene . 

 Paris green.. _ _ ... 



Unit 



4 tablespoonfuls. .. 

 1 tablespoonful 



5 tablespoonfuls. .. 



5 teaspoonfuls 



2>2 tablespoonfuls. 

 VA tablespoonfuls. 



5 tablespoonfuls . . 



6 tablespoonfuls. .. 

 V/ z tablespoonfuls. 

 2 l A tablespoonfuls. 



8K teaspoonfuls. .. 

 0> l A teaspoonfuls. . . 

 6 tablespoonfuls... 



Cups 

 4 





1 



Calcium arsenate 



Calcium caseinate 



Chalk 



5 

 2 

 2H 



Copper sulfate (pow- 



VA 



dered) . 

 Crvolite . 



Pyrethrum powder. .. 



5 

 6 



Derris powder.. 



Sodium arsenite 



Sulfur (superfine, 

 flowers of) . 



Sulfur (wettable) 



Tartar emetic 



2A 





Hydrated lime 



Kaolin . . .. 



3 

 2 





6 









Table 4. — Talles of measures 



LIQUID MEASURE 



5 milliliters =1 teaspoonful. 



3 teaspoonfuls =1 tablespoonful. 



2 tablespoonfuls = 1 fluid ounce. 



16 fluid ounces =1 pint (2 cups or 32 tablespoonfuls). 



8 pints = l gallon. 



Equivalent Quantities of Liquid Insectictdai. Materials When Mixing by Parts 



Quantity 



Dilution 



of water 

 (gallons) 



1 to 400 



1 to 800 



1 to 1,000 



1 to 1,600 



100 



1 quart 



1 pint. 



12.8 fluid ounces 



3.1' fluid ounces 



4 teaspoonfuls 



\i teaspoonfol 



1 -2 pint. 



2 fluid ounces. 



2} : teaspoonfuls. 



.spoonful. 



25 



5... 



8 fluid ounces (1 cup).. 



1.6 fluid ounces 



2 teaspoonfuls 



4 fluid ounces (} -j cap). 



1 











