Bulletin Volume 116, (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ...moth of all of the parasites mentioned in this list. In addition to the parasites previously mentioned as attacking the larva; and pupae, on September 7, 1906, a large number of parasitized eggs of the grape-berry moth were found in a badly infested portion of the vineyard of Mr. W. S. Wheeler at North East, Pa. A number of adults were reared from these parasitized eggs and later identified by Dr. Howard as Trichogramma pretiosa Riley. This is the first record of parasitized eggs of this insect that has come to our notice, and it is the only instance in which this condition has been observed during this investigation. 1 Can. Ent., vol. 36, pp. 333-334, November, 1904. DEGREE OF VINEYARD INFESTATION IN ERIE COUNTY, PA. The infestation of vineyards by this pest is by no means general. It frequently happens that serious infestation will be confined to one or two rows along the edge of a vineyard or running in for a few vines at the end of a number of rows, or again, in an irregular patch at the corner of a vineyard. Usually such areas of very serious infestation are adjoining hedgerows, fences, or bordering rough lands which admit of the accumulation of leaves and trash. On the other hand, the worst infestation over a large area coming under our observation was in a vineyard which was surrounded by neither hedges nor ditches, was a considerable distance from woodlots or rough land, and was subject to clean culture and excellent care. Again, it is not unusual to find a vineyard portions of which have been badly infested for a number of seasons but adjacent vineyards comparatively free from infestation. Because of this seemingly erratic infestation it is exceedingly difficult either to estimate the actual damage wrought by the pest or to secure reliable results ...