Field Assessment of Greenbug (Homoptera: Aphididae) Demography on Corn
作者:
G. W. Mccauley,
D. C. Margolies,
J. C. Reese,
期刊:
Environmental Entomology
(OUP Available online 1992)
卷期:
Volume 21,
issue 5
页码: 1072-1076
ISSN:0046-225X
年代: 1992
DOI:10.1093/ee/21.5.1072
出版商: Oxford University Press
关键词: Schizaphis graminum;biotype E;corn
数据来源: OUP
摘要:
Biotype E green bugs from populations maintained either on Corn,Zea maysL., or grain sorghum,Sorghum bicolor(L.) Moench., were studied to determine their ability to use Corn as a host in the field. Two Corn germplasm accessions (‘Antigua’ and OH-45), two commercial Corn hybrids (AGRIPRO-AP670andASGROW/OSGOLD-2570), one susceptible grain sorghum (NC+630x), and two resistant sorghums (PI264453 and PI266965) were used. Daily mortality and fecundity schedules were measured, and demographic statistics were calculated. In general, longevity was greater for Corn-reared than for sorghum-reared greenbugs. All life history measures indicated that green bugs did as well on ‘Antigua’ Corn as on sorghum. However, of 64 greenbugs tested on OH-45 and ASGROW/OS GOLD-2570, only 1 and 6, respectively, survived to adulthood. Development time was significantly longer on OH-45, AGRIPRO-AP670, and ASGROW/OS GOLD-2570 for the first, second, and third instars, but not the fourth. This supports early greenhouse studies suggesting that green bugs can physiologically adapt to a new host. These results indicate that greenbugs can develop and reproduce to some extent on commercial Corn hybrids in the field, but not as well as suggested by greenhouse studies.
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