Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Pig. 72. Parasitized Insects. Tri:atmi:\t of Pi;xci: Posib. a. Cabbage bug parasitized by Cordyteps nutans, b. cabbage bug parasitized by (\irdyceps sobolifera {a. and 6. after Lloyd), c. watermelon aphids parasitized by Lysiphlebus testaceipes, showing circular holes on the backs of the aphids through which parasite emerged, d. a female of L. testaceipes in the act of laying her eggs in the back of a green aphis (after Webster), e. Creosoted post after a period of service, /. a will
Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Pig. 72. Parasitized Insects. Tri:atmi:\t of Pi;xci: Posib. a. Cabbage bug parasitized by Cordyteps nutans, b. cabbage bug parasitized by (\irdyceps sobolifera {a. and 6. after Lloyd), c. watermelon aphids parasitized by Lysiphlebus testaceipes, showing circular holes on the backs of the aphids through which parasite emerged, d. a female of L. testaceipes in the act of laying her eggs in the back of a green aphis (after Webster), e. Creosoted post after a period of service, /. a willow post treated 4 hours in hot creosote and 10 hours in cold; set June 13, 1005, examined November i, 1914, and showing practically no deterioration after 9} years' service. 2. A split soft maple post treated 4 hours in hot creosote and 10 hours in cold; set in 190S and examined November is, 1914. The post was set below the creosote line and some decay has entered beneath the creosote shell, j. A 5-inch split Cottonwood post given a creosote bath treatment, set in 1905 and examined in 1914. The post shows practically no decomposition in either top or bottom. 4. An 8-inch ash post split in half, given butt creosote treatment of 6 hours in hot and 12 hours in cold, set 1905 and examined in November, 1914. The creosoted bottom is sound, penetration on the heart wood surface was less than in the sap wood. The heart wood portion of this post will undoubtedly give away first. The untreated top is in excellent condition. 5. A 4-inch untreated white cedar post after standing 9} years. /. A small treating tank in operation, {e. and /. after McDonald).
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