 ... the leaves and fruit of all these species of Citrus the effects of its attack are essentially the same, although the rust is most noticeable on the Sweet and Bitter Orange. Effect of Attacks upon the Foliage. — Like certain internal animal parasites...  Florida Fruits and how Raise Them - Página 115por Helen Garnie Warner - 1886 - 343 páginasVista completa - Acerca de este libro
 | U.S Department of Agriculture - 1884 - 752 páginas
...Foliage. — Like certain internal animal parasites, -which feed only upon the fat of their hosts, and do not touch its vital organs, the mite does not...drop, no matter how severely attacked, but there is loss of vitality, and the growth of the plant is checked. This is especially noticed in young trees,... | |
 | United States. Department of Agriculture - 1884 - 760 páginas
...the Foliage. — Like certain internal animal parasites, which feed only upon the fat of their hosts, and do not touch its vital organs, the mite does not...drop, no matter how severely attacked, but there is loss of vitality, and the growth of the plant is checked. This is especially noticed in young trees,... | |
 | United States. Department of Agriculture - 1884 - 744 páginas
...the Foliage. — Like certain internal animal parasites, Which feed only upon the fat of their hosts, and do not touch its vital organs, the mite does not...functions of the leaf. The chlorophyl is untouched, aud the plant is robbed of a portion only of its essential oil. The leaves never drop, no matter how... | |
 | United States. Department of Agriculture - 1884 - 756 páginas
...the Foliage. — Like certain internal animal parasites, which feed only upon the fat of their hosts, and do not touch its vital organs, the mite does not destroy the vital functions of the leaf. The chloropliyl is untouched, and the plant is robbed of a portion only of its essential oil. The leaves... | |
 | Henry Guernsey Hubbard - 1885 - 276 páginas
...the Foliage. — Like certain internal animal parasites which feed only upon the fat of their hosts, and do not touch its vital organs, the Mite does not...drop, no matter how severely attacked, but there is loss of vitality, and the growth of the plant is checked. This is especially noticed in young trees,... | |
 | Helen Harcourt - 1886 - 360 páginas
...directly by this agency, and therefore spread most rapidly in the direction of the prevailing currents. Spiders of the web-making kinds are necessarily dependent...of the plant is checked. This is especially noticed in young trees, which are frequently overrun by the pests in early summer, and during the remainder... | |
 | 1884 - 814 páginas
...the Foliage. — Like certain internal animal parasites, which feed only upon the fat of their hosts, and do not touch its vital organs, the mite does not...robbed of a portion only of its essential oil. The leave* never drop, no matter how severely attacked, but there is loss of vitality, and the growth of... | |
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