Laboratory Outlines in Plant Pathology
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In our eReader you can find the full English version of the book. Read Laboratory Outlines in Plant Pathology Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Laboratory Outlines in Plant Pathology
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In the material provided, note : — 1. The brown tips of certain needles. This is the first evidence of the disease when the needle becomes infected near the tip.
2. In some cases the entire needle may gradually become straw- yellow in color and then turn brown later in the season.
3. The long rows of black, shiny fruit-bodies of the pathogene on the dead needles. On which surface of the needle do they occur, dorsal or ventral ? draw.
On the twigs. The mycelium, grows from the affected needles i...nto the twig and produces hypertrophy. Later the affected twigs die. The branch bearing affected twdgs becomes gnarled and enlarged. Adventitious buds are forced and a witches'-broom is developed. In the specimens provided, OBSERVE : — 4. The hypertrophied twigs and branches.
5. The character of the brooms produced on the older trees.
(See Jour. Agr. Res. 6, pi. XXXII.) DRAW showing the effect on the woody parts of the tree.
ETIOLOGY The leaf-cast of yellow pine is caused by Hypoderma deformans Weir.
What to read after Laboratory Outlines in Plant Pathology?
You can find similar books in the "Read Also" column, or choose other free books by Herbert Hice Whetzel to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
In the material provided, note : — 1. The brown tips of certain needles. This is the first evidence of the disease when the needle becomes infected near the tip.
2. In some cases the entire needle may gradually become straw- yellow in color and then turn brown later in the season.
3. The long rows of black, shiny fruit-bodies of the pathogene on the dead needles. On which surface of the needle do they occur, dorsal or ventral ? draw.
On the twigs. The mycelium, grows from the affected needles i...nto the twig and produces hypertrophy. Later the affected twigs die. The branch bearing affected twdgs becomes gnarled and enlarged. Adventitious buds are forced and a witches'-broom is developed. In the specimens provided, OBSERVE : — 4. The hypertrophied twigs and branches.
5. The character of the brooms produced on the older trees.
(See Jour. Agr. Res. 6, pi. XXXII.) DRAW showing the effect on the woody parts of the tree.
ETIOLOGY The leaf-cast of yellow pine is caused by Hypoderma deformans Weir.
What to read after Laboratory Outlines in Plant Pathology?
You can find similar books in the "Read Also" column, or choose other free books by Herbert Hice Whetzel to read onlineMoreLess
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