The New Encyclopaedia Britannica, Volume 24Encyclopaedia Britannica, 1974 - Encyclopedias and dictionaries |
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Page 368
... pests and pest control antigenicity of bites in man 9 : 256h crop destruction and control measures 1 : 353e - earwax's effect on activity 5 : 1132e flies ' importance to man and environment 5 : 819b forestry and pest control 7 : 532a ...
... pests and pest control antigenicity of bites in man 9 : 256h crop destruction and control measures 1 : 353e - earwax's effect on activity 5 : 1132e flies ' importance to man and environment 5 : 819b forestry and pest control 7 : 532a ...
Page 369
... pest control chemicals . Most insecticides are sprayed or dusted onto plants and surfaces . Stomach poisons , ingested by chewing in- sects such as caterpillars , retain their effective- ness over long periods of time but are danger ...
... pest control chemicals . Most insecticides are sprayed or dusted onto plants and surfaces . Stomach poisons , ingested by chewing in- sects such as caterpillars , retain their effective- ness over long periods of time but are danger ...
Page 858
... pest , Knip- ling first conceived the idea of using steriliza- tion as a pest - control weapon . Observing in the laboratory that female screwworms ap- peared to be monogamous , that is , capable of mating only once , and aware of ...
... pest , Knip- ling first conceived the idea of using steriliza- tion as a pest - control weapon . Observing in the laboratory that female screwworms ap- peared to be monogamous , that is , capable of mating only once , and aware of ...
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