. Bulletin of the Department of Agriculture. Agriculture. THE PEAR THEIPS IN CALIFORNIA. ever, were found to bo (Eathrips) Frankliniella occidentalis Pergande and (Euthrips) Frankliniella tritici Fitch, neither of which is particu- hirly injurious to deciduous fruits. Reports of injury supposed to have been caused by this species were received from the Rogue River Valley hi Oregon, but a critical examination, in 1909, showed no signs of the work of the pear thrips. In the spring of 1910 many larviB of (Euthrips) tritici were found, but none of the species under consid- erati
. Bulletin of the Department of Agriculture. Agriculture. THE PEAR THEIPS IN CALIFORNIA. ever, were found to bo (Eathrips) Frankliniella occidentalis Pergande and (Euthrips) Frankliniella tritici Fitch, neither of which is particu- hirly injurious to deciduous fruits. Reports of injury supposed to have been caused by this species were received from the Rogue River Valley hi Oregon, but a critical examination, in 1909, showed no signs of the work of the pear thrips. In the spring of 1910 many larviB of (Euthrips) tritici were found, but none of the species under consid- eration could be obtained. Not until the year 1911 was tlje pear thrips positively known to be present in the United States outside of the infested districts of Cali- fornia. However, in the spring of 1911 Mr. P. J. Parrott found it in considerable numbers around Germantown and other points along the Hudson River in New York.^ Later in the year specimens of (Euthrips) Tseniothrips pyri were found among some Thy- sanoptera which had been col- lected in the spring by IVIr. Parrott in the vicinitv of Geneva, N. Y. " In May, 1912, Mr. A. L. Quaintance sent the authors a number of specimens of thrips collected in pear blos- soms from six differ- ent orchards by ]Mr. Fred Johnson at North East, Pa. All proved to be tlie pear thrips, (Euthrips) Tseniothrips pyri. In 1909 Bagnall - reported that numerous examples of this very injurious species, taken in phmi blossoms at Evesham, England, had been sent to him by Mr. Walter Collinge. So far as we know, this and the previously mentioned account by Theobald are the only published reports of the occurrence of this species outside of the United States. Two other species of Thysanoptera (Thrips plnjsapus L. and T. flam Schrank) are mentioned by Carpenter as the "pear-blossom thrips" 1 Parrott, P. J. Occurrence of Euthrips pyri Daniel in New York State In Science, n s., v. 34, no. 864, p. 94, July 21, 1911. 2 Batcnall, Richard S. A c
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