The Technical World Magazine, Volume 15Technical World Company, 1911 |
From inside the book
Results 11-15 of 97
Page 176
... tree , plant , bulb and package of fruit is taken possession of by these officials and carefully examined . Those found free from the suspicion of insect pests are promptly passed , and others are either fumigated or burned , as ...
... tree , plant , bulb and package of fruit is taken possession of by these officials and carefully examined . Those found free from the suspicion of insect pests are promptly passed , and others are either fumigated or burned , as ...
Page 177
... trees for the ornamentation of his grounds . In the early seventies , the pest that became known as the San Jose scale , appeared on trees belonging to him , rapidly spreading to other orchards in the neigh- borhood , and later to all ...
... trees for the ornamentation of his grounds . In the early seventies , the pest that became known as the San Jose scale , appeared on trees belonging to him , rapidly spreading to other orchards in the neigh- borhood , and later to all ...
Page 178
... trees infested with a scale pest , box them carefully , and ship them to the distant coun- try in which the enemy of the pest is found . There they are unpacked and ex- posed to the action of the eggs in those of the scales . Then the trees ...
... trees infested with a scale pest , box them carefully , and ship them to the distant coun- try in which the enemy of the pest is found . There they are unpacked and ex- posed to the action of the eggs in those of the scales . Then the trees ...
Page 235
... tree - hop- pers " have sucking mouthpieces and live on the juice or sap of small trees and plants , which they extract from the stems by means of their sharp beaks , consisting of several bristles enclosed in a fleshy joined sheath ...
... tree - hop- pers " have sucking mouthpieces and live on the juice or sap of small trees and plants , which they extract from the stems by means of their sharp beaks , consisting of several bristles enclosed in a fleshy joined sheath ...
Page 236
... tree - hoppers are practically harmless and are not usually found in sufficiently large numbers to constitute a pest . Nearly all the best and most curious specimens are obtained from various tropical parts of South and Cen- tral ...
... tree - hoppers are practically harmless and are not usually found in sufficiently large numbers to constitute a pest . Nearly all the best and most curious specimens are obtained from various tropical parts of South and Cen- tral ...
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