Immunity to DDT in flies debated on farms
Debate over whether flies become immune or resistant to DDT after years of use. Entomologists acknowledge insects can develop resistance, citing lab-created DDT resistant fly strains and comparisons to other pests. Practical failures may reflect inferior product or untreated breeding sites where DDT acts slowly.
MENTIONED IN THIS ARTICLE
Uncle Sam
Olive Taxes Drove Olive Orchards From The Balkan Province
In a historical note from Macedonia under Ottoman rule, Turks used heavy olive tax burdens to deter competition from rival nationalities. The taxes forced many olive owners to cut down their trees, harming a key local industry.
MENTIONED IN THIS ARTICLE
Balkan
Macedonia
Insecticide Pyrenone Aids Livestock Fly Control
New insecticide pyrenone proves effective against livestock flies and is now used in some sprays. Protein supplements in rations boost profits, with grain prices making supplements more affordable. Farmers with pullets should expect strong egg prices next season as care improves. Benzene hexachloride, recommended for hog lice, is being added to hog oils for dips, wallows, oilers, and rubbing posts.
Reviving Grindstone With a Sharp Tool for Dressing
A farm grindstone, battered across its diameter and worn flat in one spot, was easily trued by dressing it with a sharp pointed tool attached to a small board. The tool’s cutting tip is made of carboloy carbide, the hardest metal made by man.
Tests Show Tung Meal Poisonous to Chickens
Tests at the Florida Agricultural Experiment Station show tung meal is an unsatisfactory protein source for chicks. Raw or processed forms caused high mortality at 10 and 15 percent levels, and at 5 percent and higher levels it interfered with feed utilization and growth.
MENTIONED IN THIS ARTICLE
Florida Agricultural Experiment Station
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