Dispersion of Gipsy-Moth Larvæ By the Wind
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In our eReader you can find the full English version of the book. Read Dispersion of Gipsy-Moth Larvæ By the Wind 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 Dispersion of Gipsy-Moth Larvæ By the Wind
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To quickly assess the difficulty of the text, read a short excerpt:
SCREEN EXPERIMENT CONDUCTED ON PLUM ISLAND, MASS., IN 1914.
April 14, 1914, a screen (PL III, fig. 2) was erected on the edge of the marsh near the Merrimac River. It was of the same size and proportions as that erected 1 mile farther north, at Salisbury Beach.
The slirubbery, composed mostly of beach plum, bayberry, wild rose, sumac, poplar, and wiUow, on the north end of the island, was ex- amined for egg clusters and these were creosoted. This practically obliterated the source of infestatio...n to the eastward of the screen.
The location of the screen (PL III, fig. 2) was such that it was 2 miles from infested woodlands across the marshes and Merrimac River to the northwest, west, and southwest. Frequent examina- tions made it possible to determine the direction from which all the caterpillars came. It is not supposed that all the caterpillars caught during the time west winds prevailed came from the nearest infesta- tions (2 miles), but in some instances 5 miles or more. There was, however, a small infestation on a few roadside willows 1 mile to the southwest, but these were so thoroughly cleaned and tanglefooted in the spring that no caterpillars could be found on them during the dispersion season.
What to read after Dispersion of Gipsy-Moth Larvæ By the Wind?
You can find similar books in the "Read Also" column, or choose other free books by Collins, Charles Walter. [from Old Catalog] to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
SCREEN EXPERIMENT CONDUCTED ON PLUM ISLAND, MASS., IN 1914.
April 14, 1914, a screen (PL III, fig. 2) was erected on the edge of the marsh near the Merrimac River. It was of the same size and proportions as that erected 1 mile farther north, at Salisbury Beach.
The slirubbery, composed mostly of beach plum, bayberry, wild rose, sumac, poplar, and wiUow, on the north end of the island, was ex- amined for egg clusters and these were creosoted. This practically obliterated the source of infestatio...n to the eastward of the screen.
The location of the screen (PL III, fig. 2) was such that it was 2 miles from infested woodlands across the marshes and Merrimac River to the northwest, west, and southwest. Frequent examina- tions made it possible to determine the direction from which all the caterpillars came. It is not supposed that all the caterpillars caught during the time west winds prevailed came from the nearest infesta- tions (2 miles), but in some instances 5 miles or more. There was, however, a small infestation on a few roadside willows 1 mile to the southwest, but these were so thoroughly cleaned and tanglefooted in the spring that no caterpillars could be found on them during the dispersion season.
What to read after Dispersion of Gipsy-Moth Larvæ By the Wind?
You can find similar books in the "Read Also" column, or choose other free books by Collins, Charles Walter. [from Old Catalog] to read onlineMoreLess
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