The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 50
... insects , diseases , and irrigation are more readily and economically controlled . The production of trans- plants is often a specialty of growers who sell their pro- duce to other vegetable growers . The seeds may be plant- ed at a ...
... insects , diseases , and irrigation are more readily and economically controlled . The production of trans- plants is often a specialty of growers who sell their pro- duce to other vegetable growers . The seeds may be plant- ed at a ...
Page 51
... insects but do not affect bees , which are valuable for their role in pollination ( see PEST CONTROL ) . Frost ... insect , and disease injury and should be at the proper stage of maturity . Common ( unrefrigerated ) storage and cold ...
... insects but do not affect bees , which are valuable for their role in pollination ( see PEST CONTROL ) . Frost ... insect , and disease injury and should be at the proper stage of maturity . Common ( unrefrigerated ) storage and cold ...
Page 727
... insect species in 1945. Release of insects continued for a number of years , the effort being carried to Oregon , Washington , and Idaho by 1950. The insects spread rapid- ly after introduction , and recent reports indicate that some ...
... insect species in 1945. Release of insects continued for a number of years , the effort being carried to Oregon , Washington , and Idaho by 1950. The insects spread rapid- ly after introduction , and recent reports indicate that some ...
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