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Disease Control by Plant Breeding
Biological Problems arising from the Control of Animal
Antibiotics in Animal Feedingstuffs
8 other sections not shown
Africa agriculture animals Anon antibiotics aphid areas arising attack bacteria become beet biological breeding cabbage cattle caused cent coccidiosis control of disease crops damage danger death-rate disease control disease resistance drug-resistant drugs ecological econ economic effect efficient eliminated Eliot Slater endemic epidemic eradication ethical selection example factors fertility fungi fungicides genes genetic grower growth hazards herds hospital human immunity important increase infection insecticides intelligence Johne's disease Jour malaria mental method of control mortality natural selection occur organism over-population parasite pathogen pea moth penicillin penicillin-resistant pest control pesticides pests and diseases piroplasmosis plant breeder population possible present problem production pyogenes races reduced resistant strains resistant varieties result rinderpest rust schizophrenia sensitive serious soil species spray chemicals standard of living staphylococci strains of Staph streptomycin susceptible swine erysipelas to-day tolerance toxic treatment tsetse tsetse fly tuberculosis vaccine virulence virus wheat World Health Organization