. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 82 LEAFHOPPEKS AFFECTING CEREALS, ETC. nymphs occurring July 16. Wliilc this record would indicate two generations eacli year, it indicates also the fact that an early mowing in May coinciding with the time at which the species occurs in the egg form in the stems of grasses would effectually control it. Other species of the genus, the egg deposition of wliich occurred at a different period, were not so completely exterminated as tliis one. The results in this case, however, would seem to show that mowing, at a ti
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 82 LEAFHOPPEKS AFFECTING CEREALS, ETC. nymphs occurring July 16. Wliilc this record would indicate two generations eacli year, it indicates also the fact that an early mowing in May coinciding with the time at which the species occurs in the egg form in the stems of grasses would effectually control it. Other species of the genus, the egg deposition of wliich occurred at a different period, were not so completely exterminated as tliis one. The results in this case, however, would seem to show that mowing, at a time when the eggs occur on the plants, may be a very effectual method of reducing the numbers of this species, wliich has a definitely limited period of egg deposition. It would, of course, be open to the same. Fig. 17.—Map showiug distribtitiou of Deltoccphalws afflais. (Original.) methods of destruction by hopperdozer, si)raying, and burning as any of the other species. Deltocephalus affinis Gillette and Ball. The species DeltocepJialus affinis has been discussed under the names dehilis and melscJieim£ri in earher articles, but it is first mentioned as an economic species in a report of the Division of Entomology, United States Department of Agriculture, in 1890. It was an extremely abun- dant and apparently destructive species in Iowa during a number of years when it was observed in that State. It occurs in greatest abun- dance in bluegrass in lawns and upon pastures or meadows, showing a distinct preference for open and sunny situations rather than sliaded locations. It was abundant in both wheat and grass at Sault Ste. Marie, June 23 and 24, 1910, mainly in the adult stage. DISTRIBUTION. It has a very extensive distribution (see fig. 17), having been reported under various names from the New England States and. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these il
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