George G. Gyrisco
Cornell University
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Ecology | 1960
H. H. Shorey; R. H. Burrage; George G. Gyrisco
The European chafer, Amphimallon niajalis (Razoumnowsky) (Scarabaeidae) is an introduced pest of turf which has become established in several areas in New York, Connecticut, and West Virginia. The largest of these infested areas include major portions of Wayne, Ontario, and Monroe Counties, New York. The larvae of the European chafer feed primarily on fibrous root systems and often cause considerable damage to stands of grasses and winter grains. The adults, which are active (luring June and July, do not feed. They emerge from the soil at sunset, fly to trees, mate, and return to the soil before sunrise. With the exception of these adult nocturnal flights, the entire life cycle is completed in the soil. In New York, one year is normally required for development from egg to adult. There are 3 larval instars, with the 3rd instar larva being the usual overwintering stage. Burrage and Gyrisco (1954a, 1954b) have demonstrated that the larvae of the European chafer are not distributed at random in permanent l)asture sod. The (listribution of the larvae more closely approximated a negative binomial than a Poisson series, indicating that there is more clustering of larvae in the soil than would be expected if they were distributed at random. Some of this clustering probably arises because, although deposited singly, the eggs are laid in small groups in the soil. Clustering also could be attril)utal)le to environmental factors which might produce differences in the suitability or accessibility to the European chafer of different areas within a field. Certain of these factors have been investigated by Gyrisco et al. (1954), who found that areas in fields kept fallow or covered by tall grass contained fewer larvae than areas having a short grass cover. They noted also that larval infestations were usually light in poorly drained locations. In the course of sampling studies conducted between 1949 and 1958, several environmental
Entomologia Experimentalis Et Applicata | 1959
William G. Evans; George G. Gyrisco
By using a large cage in the field and a system of marking, the flight activities of 36 females and 49 males of the European chafer were followed during June and July, 1954.
Annals of The Entomological Society of America | 1966
Lowell R. Nault; George G. Gyrisco
Annals of The Entomological Society of America | 1960
R. L. Ridgway; George G. Gyrisco
Journal of Economic Entomology | 1954
R. H. Burrage; George G. Gyrisco
Journal of Economic Entomology | 1963
H. Y. Forsythe; George G. Gyrisco
Annals of The Entomological Society of America | 1967
Ronald J. Prokopy; Edward J. Armbrust; Warren R. Cothran; George G. Gyrisco
Journal of Economic Entomology | 1954
R. H. Burrage; George G. Gyrisco
Journal of Economic Entomology | 1952
Lemac Hopkins; L. B. Norton; George G. Gyrisco
Journal of Economic Entomology | 1964
D. D. Hardee; Walter H. Gutenmann; G. I. Keenan; George G. Gyrisco; Donald J. Lisk; F. H. Fox; G. W. Trimberger; R. F. Holland