Population Trends of Onion Maggots1Correlated with Air Thermal Unit Accumulations2
作者:
C. J. Eckenrode,
E. V. Vea,
K. W. Stone,
期刊:
Environmental Entomology
(OUP Available online 1975)
卷期:
Volume 4,
issue 5
页码: 785-789
ISSN:0046-225X
年代: 1975
DOI:10.1093/ee/4.5.785
出版商: Oxford University Press
数据来源: OUP
摘要:
Four years of field trapping indicated 3 distinct broods of onion maggot adults in a New York growing season. Early- and late-season injuries closely followed the population trends. Laboratory studies using 8 constant temperatures established a threshold of 40°F for adult emergence. The average air thermal unit accumulations for 50% catch of spring, second, and third broods were 712, 1187 and 1257, respectively. Incorporation of temperature accumulations, earliest dates of population buildup, and field-monitoring provides New York growers with an early-warning system.
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