. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. VINEYARD SPRAYING AGAINST ROSE-CHAFER. 55 a very ragged fruit cluster is the result. (KSee figs. 20-21.) By the time the berries have attained the size of buckshot, or even smaller, the danger has practically passed. This danger period covers about three weeks, dating from about June 13 to July 5. It is, however, from about June 15 to 25 that the beetles appear in maximum num- bers in the Lake Erie Valley, swarming into vineyards planted on light sandy soil from adjacent and rough sod lands and doing an immense a
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. VINEYARD SPRAYING AGAINST ROSE-CHAFER. 55 a very ragged fruit cluster is the result. (KSee figs. 20-21.) By the time the berries have attained the size of buckshot, or even smaller, the danger has practically passed. This danger period covers about three weeks, dating from about June 13 to July 5. It is, however, from about June 15 to 25 that the beetles appear in maximum num- bers in the Lake Erie Valley, swarming into vineyards planted on light sandy soil from adjacent and rough sod lands and doing an immense amount of damage in a very short period. It is in the sandy soils of these pastures and rough sod lands along the lake shore that the insect breeds. Detached vineyards with general farm. Fig. 18.—The rose-chafer (Macrodactylus suhspinosus) : a, Adult or beetle; b, larva; c, d, mouthparts of larva ; e, pupa; /, injury to leaves and blossoms of grape, with beetles at work, a, b, e, Much enlarged; c, d, more enlarged; /, slightly reduced. (From Marlatt.) lands intervening are much more likely to suffer from serious infes- tation than where the vineyards are continuous and practically all of the soil is under clean cultivation. Tlius there is an area in the township of Xorth East, Pa., about 2 or 3 miles in length, lying parallel with the lake shore, where the soil is of a light gravel-and- sand composition, Avhich in former years was badly infested by rose- chafers. Within the past few years practically all of the general farm lands of this area have been broken up and planted to vine- yards. These vineyards are now subject to clean culture, with the result that there has been no serious invasion by this pest over this area for several 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. Bu
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