Bulletin No. 116, pts. 1-5
Bulletin No. 116, pts. 1-5
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In 1868 Packard recorded the larva as feeding on the leaves, but the next year he corrected this error, and later observations by entomologists have failed to confirm this habit. The first larvae to hatch are from eggs which are laid by the earliest emerging moths in spring and are doubtless deposited on the unexpanded blossom buds or on the stems of the blossom clusters. These larvae attack the blossoms and the tiny berries. In the course of its movements, which must cover the entire blossom c...luster, the larva spins a silken web. This web binds to each other and to the stem the dried corollas, stamens, and partly devoured berries, forming a conspicuous mass (see fig. 5). Usually, however, these webs formed during the blossoming period of the grape are not very numerous except in those portions of vineyards where the infestation is very heavy. In addition to attacking the blos- soms and small berries of the young grape clusters the larva some- times burrows into the stem, destroying a part of the cluster (see PL V, fig.
What to read after Bulletin No. 116, pts. 1-5?
You can find similar books in the "Read Also" column, or choose other free books by United States. Bureau of Entomology. [from Old Catalog] to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
In 1868 Packard recorded the larva as feeding on the leaves, but the next year he corrected this error, and later observations by entomologists have failed to confirm this habit. The first larvae to hatch are from eggs which are laid by the earliest emerging moths in spring and are doubtless deposited on the unexpanded blossom buds or on the stems of the blossom clusters. These larvae attack the blossoms and the tiny berries. In the course of its movements, which must cover the entire blossom c...luster, the larva spins a silken web. This web binds to each other and to the stem the dried corollas, stamens, and partly devoured berries, forming a conspicuous mass (see fig. 5). Usually, however, these webs formed during the blossoming period of the grape are not very numerous except in those portions of vineyards where the infestation is very heavy. In addition to attacking the blos- soms and small berries of the young grape clusters the larva some- times burrows into the stem, destroying a part of the cluster (see PL V, fig.
What to read after Bulletin No. 116, pts. 1-5?
You can find similar books in the "Read Also" column, or choose other free books by United States. Bureau of Entomology. [from Old Catalog] to read onlineMoreLess
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