INSECT PESTS FORMULAS FOR THEIR DESTRUCTION. 255 



SIX-SPOTTED MITE. 



Tetranychus 6-maculatus, Riley. 



This mite was introduced into 

 the lower portion of the State 

 on citrus trees from Florida. In 

 that State it has done consider- 

 able damage to citrus fruits. 

 Infested trees may be recognized 

 by a mottled appearance. The 

 mites congregate on the under- 

 side of the leaves, usually pro- 

 ducing a concavity. The upper 

 surface of the leaves is marked 

 with yellow blotches. 



Treatment. Formula No. 5. 



SIX-SPOTTED MITE. 

 a, insect, enlarged; b, tarsus; c, ros- 

 trum and palpus, still more enlarged; 

 d, tip of palpus, still more enlarged. 



FORMULAS FOR DESTROYING INSECT PESTS 

 AFFECTING THE CITRUS. 



The following formulas of insecticides for the destruction of 

 the various pests that affect citrus trees have proved the most 

 effectual in this State: 



(1) Rosin Solution. 



(For the Red and the Yellow Scale on citrus trees.) 



Rosin ._ 20 pounds. 



Caustic soda (70 per cent) 7 pounds. 



Fish oil 3 pints. 



Water, to make 100 gallons. 



Place the rosin, caustic soda, and fish oil in a boiler, pour 

 over them about 20 gallons of water, and cook thoroughly over 

 a brisk fire for three hours; then add hot water, a little occa- 

 sionally, and stir well, until diluted to 50 gallons of hot solu- 

 tion. Place this in the spray tank and add cold water to make 

 the necessary amount. Never add cold water when cooking. 



