The New Encyclopaedia Britannica, Volumes 1-10Encyclopaedia Britannica, 1974 - Reference [1] Propaedia: outline of knowledge and guide to the Britannica.--[2]-[11] Micropaedia: ready reference and index.--[12]-[30] Macropaedia: knowledge in depth. |
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Page 794
... PEST CONTROL Honeybees have diseases and enemies : diseases of the brood ; diseases that affect only the adult bees ; insect enemies of the adults and of the comb ; and other enemies , including toads , lizards , birds , mice , skunks ...
... PEST CONTROL Honeybees have diseases and enemies : diseases of the brood ; diseases that affect only the adult bees ; insect enemies of the adults and of the comb ; and other enemies , including toads , lizards , birds , mice , skunks ...
Page 1047
... pest of elm trees . When this pathogen estab- lished itself in North America , however , it severely in- fected ... pests . Almost all insect species are attacked by one para- sitoid or another . Some parasitoids are gregarious , with ...
... pest of elm trees . When this pathogen estab- lished itself in North America , however , it severely in- fected ... pests . Almost all insect species are attacked by one para- sitoid or another . Some parasitoids are gregarious , with ...
Page 1052
... pests Vocaliza- tions Wing shape Wing. mutual antagonism , in which both interacting species may suffer , be reduced in ... pest outbreaks have oc- curred when a species has , by invasion into a new region , escaped the natural restraints ...
... pests Vocaliza- tions Wing shape Wing. mutual antagonism , in which both interacting species may suffer , be reduced in ... pest outbreaks have oc- curred when a species has , by invasion into a new region , escaped the natural restraints ...
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The New Encyclopaedia Britannica, Volumes 1-10 Encyclopaedia Britannica Publishers, Inc. Staff No preview available - 1974 |
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