Archive image from page 266 of Culture of the citrus in. Culture of the citrus in California cultureofcitrusi00lelo Year: 1902 ( INSECT PESTS—FORMULAS FOR THEIR DESTRUCTION. 263 SIX-SPOTTED MITE. Tetranychus G-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. Trea
Archive image from page 266 of Culture of the citrus in. Culture of the citrus in California cultureofcitrusi00lelo Year: 1902 ( INSECT PESTS—FORMULAS FOR THEIR DESTRUCTION. 263 SIX-SPOTTED MITE. Tetranychus G-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; h, 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.
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