. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 58 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. ciously to the blossom clusters large numbers of them can be destroyed in this manner. This method of control, however, necessitates that they be collected daily for a 2:)eriod of two or three weeks or as long- as they are at all numerous. "Where large areas are to be covered, handpicking becomes expensive and involves a great deal of time, and. Fi<i. 21.—Grape cluster frora which berries injured by rose- chafer have fallen. (Original.) in addition to this many
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 58 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. ciously to the blossom clusters large numbers of them can be destroyed in this manner. This method of control, however, necessitates that they be collected daily for a 2:)eriod of two or three weeks or as long- as they are at all numerous. "Where large areas are to be covered, handpicking becomes expensive and involves a great deal of time, and. Fi<i. 21.—Grape cluster frora which berries injured by rose- chafer have fallen. (Original.) in addition to this many of the beetles are not removed from the vines until they have accomplished more or less inj^uy. SPRAYING WITH ARSENICALS. Since the spraying of grapevines for other insect pests, such as the grape rootworm and the grape-beriy moth, has been shoAvn to be effective and has become a common practice, increased effort has been. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Entomology. Washington : G. P. O.
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